The following tables present IEM computed monthly data summaries based on
daily data provided by or computed for the IEM. A download interface
exists for the daily summary information. The climatology is provided by the
nearest NCEI climate station (USW00025507) within the current 1991-2020
dataset.
To load shown data into Microsoft Excel,
highlight the table information with your mouse and then copy/paste into Excel.
Precipitation Totals [inch]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
0.00
0.00
0.00
0.00
0.00
0.00
1949
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1950
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1951
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1952
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1953
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1954
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1955
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1956
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1957
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1958
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1959
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1960
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1961
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1962
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1963
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1964
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1965
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1966
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1967
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1968
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1969
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1970
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1971
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1972
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1973
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1974
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1975
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1976
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1977
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1978
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1979
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1980
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1981
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1982
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1983
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1984
4.85
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1985
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1986
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1987
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1988
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1989
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1990
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1991
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1992
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1993
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1994
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1995
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1996
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1997
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.11
0.00
0.00
0.00
0.00
1998
0.00
0.00
0.00
0.70
2.04
1.25
1.35
1.69
1.29
1.73
2.10
1.04
1999
2.20
1.46
1.94
0.60
0.71
0.46
0.81
2.52
2.85
2.83
1.50
1.94
2000
1.81
0.49
1.83
0.36
0.18
0.63
2.55
1.14
2.24
2.32
4.54
4.64
2001
5.21
1.64
1.66
0.65
0.21
0.03
1.96
2.16
1.84
0.68
0.79
2.76
2002
1.35
1.81
0.06
0.24
0.21
0.18
1.27
1.54
2.32
5.88
5.80
1.94
2003
1.48
1.29
0.10
0.75
0.56
0.96
0.28
2.30
1.00
2.83
1.55
3.84
2004
0.97
1.38
0.71
0.97
0.91
0.55
0.75
0.21
4.74
2.93
2.67
3.44
2005
0.35
0.81
1.49
1.03
0.37
1.14
0.79
1.23
5.07
1.85
1.42
2.34
2006
0.76
3.59
1.08
0.89
0.47
1.64
0.65
3.92
1.99
1.73
0.54
3.93
2007
2.14
0.36
0.29
1.68
0.32
0.42
1.27
1.03
3.34
2.54
7.29
3.16
2008
26.14
1.95
0.93
0.98
1.10
0.57
2.41
1.69
3.63
2.11
1.55
1.06
2009
1.82
0.71
0.67
0.31
0.83
0.40
0.94
2.02
2.46
1.70
3.34
2.79
2010
0.24
1.87
2.57
2.18
0.31
0.80
3.45
1.97
1.26
4.21
2.83
1.56
2011
1.30
2.09
0.23
1.54
0.36
0.87
0.91
3.24
2.93
2.82
2.33
5.83
2012
2.55
6.88
0.80
0.57
1.15
1.98
1.37
1.79
5.25
2.03
0.51
4.40
2013
4.12
1.21
0.96
0.53
1.06
0.48
0.83
3.33
2.30
4.20
1.38
1.48
2014
2.73
1.00
1.90
0.25
0.97
1.20
1.57
2.75
2.49
1.17
2.91
2.74
2015
1.77
0.81
1.44
3.79
0.31
0.52
1.20
1.06
4.96
2.84
3.23
3.87
2016
4.40
5.02
1.01
1.88
0.68
0.79
1.53
3.02
4.67
1.45
3.48
2.11
2017
2.67
1.62
0.06
0.58
1.15
0.45
1.19
2.89
3.12
3.70
1.51
5.03
2018
2.02
0.91
0.84
0.56
1.45
2.54
0.68
2.67
3.26
4.45
3.69
4.61
2019
2.17
1.16
2.39
2.00
0.80
0.14
1.81
0.64
3.40
3.16
3.97
5.23
2020
0.64
1.81
1.07
1.09
0.69
0.23
2.23
1.22
M
0.37
3.48
3.18
2021
2.81
1.40
1.62
0.82
0.55
0.54
1.56
2.62
1.81
3.66
2.20
2.94
2022
2.14
2.08
0.78
1.04
0.16
0.12
2.92
5.98
2.92
2.13
1.47
2.52
2023
1.88
1.19
1.20
0.62
1.42
1.25
4.25
5.33
2.24
1.22
3.11
2.55
2024
1.81
2.26
1.15
1.30
1.75
0.08
1.89
3.37
2.86
4.01
3.00
3.75
2025
5.75
0.20
0.46
M
M
M
M
M
M
M
M
M
NCEI Climatology
2.15
1.87
1.32
1.15
0.78
0.87
1.45
2.31
3.28
2.61
2.87
3.27
Average Wind Speed [MPH]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
5.8
6.5
5.7
7.9
6.1
5.2
1949
6.3
4.7
5.4
5.9
5.9
7.2
5.0
5.0
4.2
5.6
7.4
6.9
1950
3.4
7.8
6.3
7.0
7.4
5.8
4.2
5.2
6.4
5.1
7.7
5.1
1951
7.4
7.0
7.5
6.9
6.7
5.9
6.5
4.7
5.8
6.8
4.1
7.7
1952
6.8
6.6
7.3
6.8
7.2
8.2
6.5
4.9
4.8
4.9
7.0
6.5
1953
7.0
9.3
6.3
6.0
6.5
7.4
5.8
6.2
5.9
6.3
5.3
6.9
1954
6.2
6.2
6.1
5.6
6.7
6.5
5.9
5.5
4.3
7.6
4.8
5.8
1955
5.2
4.7
6.7
5.1
6.6
4.7
3.9
6.4
5.1
5.5
2.3
3.5
1956
4.7
5.8
5.1
6.3
6.5
4.7
4.0
3.3
3.6
3.7
5.6
3.5
1957
4.2
5.8
5.9
6.5
5.9
6.8
5.7
4.4
5.9
4.7
7.5
6.1
1958
6.6
6.2
6.0
6.0
7.2
7.1
5.8
5.8
6.2
6.7
6.2
6.3
1959
7.1
8.1
8.0
8.2
7.7
7.4
7.1
7.1
5.7
6.3
8.7
8.7
1960
6.5
6.0
9.7
9.4
8.5
8.6
6.8
7.2
7.2
7.6
6.6
7.4
1961
7.8
5.3
8.3
8.2
8.3
7.1
7.5
6.9
8.3
9.4
9.2
7.5
1962
7.5
5.5
6.9
7.2
7.4
7.0
6.1
6.5
6.2
6.5
6.6
6.5
1963
5.4
6.8
8.3
9.0
8.1
9.3
7.5
8.3
4.9
7.0
6.6
7.8
1964
6.7
10.2
6.4
8.4
8.6
7.0
6.8
5.9
5.4
6.5
8.2
7.1
1965
6.0
7.4
7.1
7.4
9.7
9.2
7.0
7.7
8.3
8.5
7.5
9.3
1966
9.0
10.0
12.4
10.4
10.4
7.7
8.2
6.6
7.3
9.3
6.7
7.8
1967
7.3
7.9
8.4
9.3
8.1
5.9
7.0
5.8
6.8
6.3
9.9
7.6
1968
7.4
6.2
7.7
8.9
7.8
7.7
7.4
7.3
6.8
6.7
7.6
6.8
1969
6.0
8.4
7.6
8.5
9.2
8.9
7.2
7.9
7.6
8.6
8.7
8.8
1970
7.0
9.2
9.1
9.3
8.1
9.4
7.2
7.8
7.2
8.0
7.7
8.1
1971
8.3
8.5
8.1
9.1
10.2
8.4
8.4
6.4
6.4
8.7
7.5
8.9
1972
8.3
7.8
7.9
7.4
8.4
7.9
7.5
5.7
7.2
7.7
7.8
7.1
1973
7.5
6.1
6.9
8.4
8.4
7.2
7.3
7.5
7.0
6.4
6.3
7.8
1974
5.7
7.2
6.7
7.6
8.2
8.6
7.7
7.7
8.0
9.3
8.9
8.6
1975
9.9
9.8
7.9
8.4
9.7
8.8
7.7
7.1
6.8
7.4
7.5
8.5
1976
7.2
6.6
8.5
8.2
8.5
8.7
7.1
6.8
8.3
8.0
9.7
9.9
1977
9.0
8.4
8.8
8.8
9.3
7.4
7.2
7.3
8.3
8.2
7.2
5.8
1978
6.1
9.7
6.7
7.5
8.5
8.6
7.1
7.2
7.3
8.8
8.2
10.2
1979
7.2
8.4
8.0
7.1
7.5
8.8
7.4
8.5
8.4
8.2
10.9
9.4
1980
10.0
8.0
9.0
8.8
8.7
7.5
6.8
7.1
6.3
8.5
6.7
7.4
1981
8.9
7.7
9.4
8.4
7.9
8.2
6.5
5.1
7.2
7.3
9.6
9.1
1982
7.7
8.2
8.8
9.4
9.4
9.6
8.7
7.6
8.4
9.2
8.3
9.7
1983
8.8
7.0
6.8
8.9
8.2
8.7
8.2
8.9
9.2
8.9
10.0
6.6
1984
9.3
9.3
7.9
8.3
9.2
9.0
7.3
8.5
6.9
8.0
8.4
8.1
1985
9.0
8.9
9.7
10.4
10.2
7.8
6.9
7.2
7.9
6.7
8.0
9.2
1986
7.7
8.5
7.5
9.0
8.2
8.7
8.9
7.8
7.4
7.3
8.3
8.6
1987
10.2
9.2
8.2
9.1
8.2
9.0
7.5
7.5
8.1
9.3
8.3
8.2
1988
8.2
11.2
8.8
9.7
7.3
7.6
7.7
7.4
7.6
8.1
8.8
9.8
1989
9.4
6.6
7.7
7.4
9.0
8.8
8.3
7.2
7.3
8.7
9.2
8.4
1990
8.3
7.9
7.9
7.6
8.2
8.6
7.5
7.0
8.9
7.6
9.1
7.9
1991
8.1
8.1
9.0
9.6
9.3
9.3
8.4
7.3
8.8
7.8
7.4
9.4
1992
8.7
8.0
9.1
8.8
10.5
9.9
8.4
8.4
9.9
8.4
9.5
9.7
1993
10.7
8.2
9.9
9.1
9.1
9.9
9.4
7.9
10.8
8.2
9.2
9.7
1994
7.0
8.5
10.6
8.7
9.3
9.0
8.1
8.6
7.9
8.9
8.9
7.0
1995
7.9
7.0
8.4
8.1
8.3
7.9
7.3
7.4
7.0
9.3
7.8
7.1
1996
5.8
7.9
6.7
8.6
9.2
8.4
8.7
8.1
9.0
8.3
7.8
7.5
1997
8.9
9.0
8.7
9.5
9.6
8.9
8.2
8.1
8.3
6.7
7.3
8.9
1998
4.5
4.5
6.8
7.9
7.9
6.8
5.2
6.6
6.3
6.2
5.4
5.6
1999
7.0
5.8
6.0
7.7
7.8
6.4
6.3
4.6
6.6
5.9
6.1
7.2
2000
6.3
4.1
6.8
5.4
6.6
7.1
5.6
6.2
5.0
5.0
5.8
7.9
2001
8.1
5.8
7.0
6.8
7.2
6.7
5.0
4.3
5.3
7.1
4.9
7.9
2002
6.3
8.1
6.2
7.2
6.0
6.6
5.8
5.1
5.7
7.3
6.7
5.1
2003
7.2
5.0
8.2
6.9
7.3
5.6
6.5
6.4
5.5
4.9
6.8
6.5
2004
6.3
6.1
8.0
7.5
6.9
7.0
5.7
5.3
5.7
5.5
6.9
7.9
2005
5.5
5.5
7.3
6.2
6.5
7.2
6.1
6.0
6.4
5.8
6.1
6.0
2006
5.2
8.6
5.8
6.9
7.1
6.2
6.7
5.7
5.1
6.0
4.6
6.6
2007
7.6
4.6
6.0
6.5
5.6
6.9
4.9
4.9
5.3
5.9
6.8
5.8
2008
5.8
7.0
6.5
6.5
7.0
6.4
5.0
3.8
4.8
5.4
6.1
4.8
2009
5.9
4.8
7.1
5.7
5.8
6.0
5.8
5.0
5.0
5.3
7.0
6.0
2010
3.2
6.3
7.2
6.7
6.1
5.4
4.8
4.7
4.3
4.5
6.4
5.6
2011
7.1
7.4
5.6
7.3
7.3
6.9
5.7
4.2
5.2
4.9
7.6
9.0
2012
6.7
8.3
5.6
4.9
6.2
5.6
5.1
4.5
7.0
4.1
4.2
6.7
2013
5.5
6.0
6.1
6.8
5.3
5.5
5.5
4.0
5.7
6.6
5.3
4.3
2014
6.6
6.0
5.4
5.5
6.4
5.4
5.2
5.1
4.5
4.3
6.8
6.2
2015
5.9
5.9
7.3
7.2
6.3
5.8
5.8
6.7
5.4
4.9
7.8
6.8
2016
6.8
8.4
5.1
6.8
6.6
6.0
5.8
4.3
5.6
5.8
5.2
5.6
2017
6.0
6.1
6.5
5.3
7.1
6.1
5.2
4.9
4.7
7.1
5.2
7.1
2018
6.1
6.7
5.8
6.6
6.8
6.4
6.2
6.6
4.1
5.1
5.0
7.1
2019
5.2
5.4
6.3
5.8
6.3
6.2
5.2
5.7
5.2
5.5
5.1
6.9
2020
5.3
7.1
5.9
5.9
5.8
6.5
5.7
6.0
6.3
5.8
7.5
6.5
2021
6.1
6.3
5.6
6.3
5.7
6.7
5.8
5.9
5.2
5.9
5.6
6.1
2022
6.1
7.0
6.1
5.9
7.3
5.9
5.5
4.8
4.4
5.5
5.2
5.6
2023
3.9
6.1
6.6
5.5
6.6
6.1
4.7
5.3
4.8
4.0
6.2
5.9
2024
5.7
8.1
5.1
6.8
5.9
6.3
5.3
6.5
4.9
6.3
5.1
6.0
2025
7.7
2.7
4.8
M
M
M
M
M
M
M
M
M
NCEI Climatology
M
M
M
M
M
M
M
M
M
M
M
M
Average Daily High Temperature [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
56.42
57.20
51.33
42.87
27.83
24.03
1949
26.53
24.18
38.03
38.13
47.29
53.43
58.00
59.52
53.47
43.68
37.33
24.65
1950
28.61
22.86
38.77
41.30
46.81
54.40
58.19
61.29
53.53
43.61
28.87
26.26
1951
22.61
29.79
27.52
41.07
48.77
54.37
60.55
59.52
54.60
42.26
35.93
27.16
1952
21.13
31.69
33.03
38.87
45.32
52.63
58.74
60.29
54.20
45.90
40.27
30.58
1953
25.84
32.71
33.61
44.50
50.13
60.27
63.29
59.48
54.30
42.19
35.00
32.35
1954
24.77
23.93
34.13
41.37
50.81
56.60
60.58
60.10
56.30
47.74
37.97
20.87
1955
33.32
29.50
36.00
38.50
48.26
52.50
59.58
58.26
53.73
40.81
28.93
21.71
1956
21.10
25.14
31.23
41.40
46.90
54.13
58.52
59.26
53.37
39.23
29.43
20.55
1957
30.03
29.32
38.81
44.33
51.97
59.57
61.26
61.52
54.77
49.29
42.23
24.23
1958
31.81
34.93
39.94
46.53
51.00
57.43
59.81
58.58
53.37
41.55
31.73
30.32
1959
25.26
34.93
26.84
39.97
51.45
58.63
58.42
59.58
54.83
46.23
38.23
28.77
1960
30.90
37.07
34.10
39.63
52.52
56.50
60.39
58.87
52.77
44.87
32.97
38.00
1961
33.58
29.36
29.55
41.07
51.81
57.20
59.58
59.45
54.83
40.55
31.60
20.13
1962
27.29
32.93
32.52
43.33
48.74
55.17
60.74
60.65
52.80
45.19
35.57
28.87
1963
33.13
33.64
35.87
40.27
52.77
53.77
61.03
60.87
57.20
44.90
26.37
37.10
1964
29.48
31.03
30.58
39.90
47.39
58.13
60.13
59.77
55.93
44.81
33.97
18.97
1965
24.90
25.89
40.42
43.10
46.48
51.30
56.65
58.10
55.17
39.48
33.60
24.90
1966
28.03
29.89
25.74
41.87
45.42
55.50
58.45
57.00
54.33
39.61
33.00
25.55
1967
24.94
29.18
36.58
42.80
52.52
55.33
62.00
61.32
52.90
43.55
38.00
26.81
1968
23.68
32.28
37.13
40.10
50.61
56.60
60.94
61.32
53.70
40.94
36.67
20.52
1969
19.55
28.46
37.87
44.00
50.13
56.73
58.87
58.84
54.60
47.84
31.80
37.19
1970
21.03
37.32
39.94
40.07
50.52
55.73
57.16
57.39
52.47
40.71
37.73
24.13
1971
15.68
29.89
27.03
37.23
43.48
51.80
58.10
58.68
52.77
42.39
31.67
28.16
1972
20.84
26.72
24.42
35.31
45.84
51.90
59.61
59.35
52.72
43.35
35.67
27.45
1973
18.90
30.07
34.23
43.00
48.35
54.93
59.61
58.87
52.73
42.19
30.30
29.71
1974
20.94
25.86
35.23
43.60
51.90
58.47
61.03
62.16
57.53
44.39
35.57
29.61
1975
24.23
26.46
34.03
39.00
48.26
55.50
60.10
60.13
54.77
44.19
29.00
25.87
1976
27.52
28.45
32.61
42.20
49.00
56.10
61.87
59.84
53.07
43.26
39.53
36.00
1977
41.65
40.36
33.58
41.33
48.45
58.73
62.87
62.52
55.90
43.74
27.87
22.84
1978
34.58
34.82
38.39
45.63
50.00
55.97
59.48
62.77
55.37
46.35
36.93
35.45
1979
35.61
23.86
38.81
45.17
51.06
56.33
62.32
62.06
57.93
47.45
41.17
25.52
1980
26.13
36.41
37.68
45.70
49.90
55.67
57.23
53.71
55.03
45.61
37.20
18.52
1981
39.26
34.36
41.77
45.07
53.81
57.63
60.71
59.74
52.67
44.32
34.37
29.35
1982
26.35
26.96
35.55
39.13
47.13
54.03
58.00
58.32
53.50
38.23
37.20
36.10
1983
28.10
35.96
41.87
43.73
50.71
57.60
60.55
60.39
53.03
43.74
38.90
33.45
1984
31.39
28.28
44.19
41.83
50.29
58.43
59.26
61.13
55.20
45.26
35.53
35.71
1985
40.61
25.93
35.35
33.63
47.16
52.23
58.71
57.39
53.40
39.06
31.43
40.74
1986
34.74
33.04
33.74
38.67
49.13
55.13
59.84
57.32
54.23
47.03
37.63
38.26
1987
34.48
37.00
38.65
43.30
50.13
54.53
60.35
61.65
52.10
44.87
35.07
30.32
1988
33.00
35.34
37.39
41.80
51.71
57.30
61.16
59.16
53.33
42.65
31.83
33.39
1989
17.23
32.71
34.94
44.53
49.65
56.30
62.00
61.94
55.90
43.42
30.93
35.19
1990
27.45
20.86
38.42
48.13
52.06
57.87
60.58
60.71
54.37
43.32
27.20
31.26
1991
29.71
31.04
36.16
44.57
49.61
56.23
59.19
59.65
55.20
45.68
37.67
31.94
1992
32.48
26.62
33.84
43.47
50.39
57.83
60.97
58.94
49.80
42.97
36.53
29.03
1993
29.61
32.68
38.81
47.23
54.52
57.40
63.68
61.87
54.90
46.84
38.37
37.26
1994
34.23
29.50
33.35
45.20
50.84
58.50
60.52
61.61
54.80
42.65
31.20
30.81
1995
30.45
31.93
30.55
47.27
51.61
57.37
60.32
60.00
57.20
46.58
32.73
32.84
1996
24.58
30.10
40.26
45.30
52.52
57.20
61.35
60.52
53.77
39.26
34.97
27.45
1997
29.29
39.54
36.00
46.77
55.84
60.07
63.74
63.03
57.97
41.48
40.20
28.71
1998
29.61
36.25
41.03
44.00
48.71
58.87
59.97
58.32
53.93
46.29
37.53
28.29
1999
26.03
20.79
31.35
40.50
48.13
56.37
60.32
59.45
54.53
41.90
33.00
27.55
2000
23.87
37.79
37.65
44.30
51.32
56.60
58.32
59.77
53.30
44.00
40.80
39.52
2001
37.27
36.84
37.26
44.96
49.48
60.41
60.09
61.78
55.41
40.44
34.12
26.00
2002
34.74
34.60
34.65
42.58
53.34
58.30
62.52
60.04
58.19
50.30
44.87
34.16
2003
38.38
41.63
35.22
46.56
53.14
57.73
64.12
62.72
56.61
49.05
35.79
31.17
2004
24.74
37.62
33.74
44.53
53.35
59.63
64.00
65.65
53.81
47.36
39.81
36.24
2005
35.11
35.18
40.09
48.26
56.59
61.95
65.05
62.55
56.73
45.35
29.99
38.75
2006
26.15
33.67
34.13
42.50
53.03
56.30
59.13
57.32
54.80
46.87
26.13
30.58
2007
27.77
30.18
24.97
44.70
50.48
56.83
59.81
61.03
56.07
44.45
39.83
33.13
2008
28.04
28.41
37.78
40.36
50.09
54.45
58.00
59.18
53.82
40.98
32.54
29.10
2009
26.68
29.37
32.65
42.83
53.24
57.73
61.32
59.95
54.54
48.16
33.18
34.35
2010
32.36
36.40
33.97
41.84
50.57
54.86
57.36
58.41
54.44
44.37
35.25
24.81
2011
30.88
29.98
34.12
41.62
51.25
53.27
59.39
57.25
52.86
44.31
27.44
30.81
2012
15.93
33.47
29.01
42.93
47.05
53.68
56.33
57.36
54.99
43.27
31.83
29.41
2013
36.14
36.49
35.67
38.86
50.49
60.49
65.15
62.29
57.40
51.77
37.78
31.08
2014
43.96
33.21
39.75
47.86
59.70
58.60
64.95
64.36
61.01
47.05
45.47
41.74
2015
36.49
39.75
43.45
48.51
56.83
65.51
62.91
63.73
52.90
49.17
38.68
33.02
2016
38.54
40.55
43.74
49.59
56.87
62.30
63.87
64.93
58.90
50.51
38.90
32.12
2017
30.38
34.47
33.16
49.77
55.17
61.60
63.81
60.68
56.05
47.57
34.90
39.88
2018
32.53
35.26
38.31
47.23
51.44
58.66
63.16
62.55
58.33
51.06
42.66
34.86
2019
32.86
36.48
44.77
46.04
53.61
61.93
65.61
65.45
57.37
48.05
44.77
36.71
2020
19.03
32.21
34.43
46.80
55.77
58.83
64.48
61.88
57.20
47.17
36.98
36.87
2021
36.65
31.19
33.16
45.38
53.00
58.33
61.71
60.74
54.43
45.84
26.33
30.68
2022
28.90
38.49
40.46
44.90
54.71
63.07
62.48
60.19
55.80
46.32
37.13
32.26
2023
36.32
32.93
35.58
40.90
50.52
57.80
61.87
63.16
55.17
46.48
41.50
31.55
2024
29.84
36.41
37.35
44.73
50.94
60.70
61.58
61.61
56.77
46.29
36.13
40.52
2025
38.81
39.21
43.23
M
M
M
M
M
M
M
M
M
NCEI Climatology
31.80
34.93
37.10
46.09
53.80
59.30
63.10
62.59
56.70
47.10
37.60
34.00
Average Daily Low Temperature [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
44.87
41.80
37.07
32.39
15.73
10.87
1949
13.43
8.39
25.90
24.97
31.00
40.70
43.26
43.74
41.77
31.10
26.93
11.77
1950
13.06
10.00
26.94
28.97
34.03
40.57
43.13
44.45
40.90
29.77
13.23
15.03
1951
9.90
16.68
9.74
31.27
34.39
42.13
43.81
46.13
40.53
28.45
24.27
15.52
1952
7.68
21.31
20.94
27.30
31.94
37.93
45.42
44.42
39.83
34.23
30.70
20.84
1953
12.13
20.07
19.68
29.80
34.16
44.07
45.55
47.48
40.17
29.90
23.60
22.77
1954
12.03
5.07
18.84
24.17
36.45
41.90
45.03
44.74
40.70
34.68
28.07
8.35
1955
21.90
17.46
23.03
24.63
34.90
40.03
43.16
44.74
38.73
29.71
15.93
8.74
1956
7.48
9.86
14.39
26.57
35.81
39.33
45.19
44.26
37.33
25.55
17.67
9.13
1957
17.90
12.75
26.26
28.83
33.71
42.20
44.42
45.74
42.53
33.52
33.10
13.29
1958
21.94
23.64
26.77
30.07
37.94
43.73
47.39
46.87
37.73
26.87
22.10
19.77
1959
13.61
23.36
8.84
27.17
34.32
40.57
46.00
46.23
38.83
29.52
25.87
18.71
1960
20.26
24.24
18.97
27.80
38.23
40.10
46.16
43.55
39.87
32.71
22.20
27.19
1961
21.90
16.96
11.48
29.77
34.32
42.07
46.23
44.94
41.17
27.42
19.00
8.45
1962
16.74
20.57
18.13
29.60
34.35
42.23
45.90
45.48
36.33
32.58
23.60
18.90
1963
21.87
20.93
21.52
26.37
34.16
40.67
46.90
46.87
42.60
32.81
13.83
27.48
1964
19.23
20.21
17.74
28.57
31.06
42.73
44.13
45.97
41.63
31.84
23.30
5.77
1965
14.29
13.43
31.39
29.00
35.10
40.77
45.61
44.55
46.60
27.68
20.93
13.03
1966
18.10
16.54
13.06
29.27
34.35
43.17
46.55
46.71
42.77
30.39
22.47
15.77
1967
12.58
17.54
24.03
30.37
36.42
45.37
48.61
48.61
43.63
31.39
29.40
19.26
1968
14.13
22.93
23.55
28.77
37.16
42.83
46.26
47.00
37.90
30.55
27.20
11.45
1969
8.77
16.93
25.81
33.50
38.03
45.40
48.35
42.90
40.37
37.39
23.73
30.65
1970
12.42
29.43
31.26
29.97
37.52
43.27
46.71
45.35
38.60
28.90
28.27
15.52
1971
4.87
18.61
10.35
28.27
34.16
41.43
46.35
48.74
39.67
31.94
20.77
18.26
1972
10.97
12.28
8.06
19.62
35.35
41.97
45.87
47.90
41.93
33.03
25.30
17.23
1973
6.00
14.04
22.35
32.60
36.03
42.30
46.13
45.00
39.50
30.35
16.03
19.65
1974
8.45
13.93
17.61
29.73
34.06
41.53
45.74
46.06
42.87
32.06
24.50
19.45
1975
13.23
10.68
18.81
27.07
35.94
41.43
45.55
44.84
41.53
30.03
15.97
12.90
1976
17.29
13.76
21.00
28.40
35.32
40.73
46.29
46.03
40.50
30.06
31.57
26.81
1977
32.52
31.04
20.87
29.10
34.94
44.33
46.97
50.48
42.03
34.10
14.83
11.35
1978
25.48
26.71
25.55
31.07
38.97
43.53
47.06
47.13
39.77
35.00
27.07
24.19
1979
25.87
7.71
27.71
31.83
36.81
41.60
48.35
47.65
43.87
37.97
31.07
12.29
1980
12.35
26.48
26.84
33.10
39.10
44.27
47.35
45.65
41.33
34.29
27.40
6.90
1981
31.87
23.61
30.58
29.57
40.55
42.10
48.52
48.00
42.37
34.84
25.80
21.03
1982
15.90
14.68
25.65
27.87
36.81
44.30
47.65
47.06
43.43
27.39
27.90
28.61
1983
18.90
25.07
30.32
33.13
41.48
46.20
49.06
48.23
40.67
33.97
30.47
25.23
1984
22.52
17.21
31.97
31.17
37.77
46.23
49.97
49.10
43.23
33.94
25.00
25.74
1985
31.65
15.64
25.29
22.63
35.58
41.50
48.42
46.48
42.00
27.13
18.80
30.06
1986
25.52
21.21
20.29
25.53
35.00
44.77
46.74
47.77
41.97
34.10
26.60
29.55
1987
25.23
27.50
24.71
30.23
38.55
45.40
49.03
47.84
40.50
34.39
27.63
19.74
1988
22.71
25.59
29.65
31.47
38.26
45.10
49.61
48.61
39.43
32.35
21.60
21.81
1989
4.61
18.96
20.19
31.20
37.32
43.53
48.94
51.00
46.20
32.87
21.03
25.26
1990
17.84
7.61
26.58
31.90
40.97
45.07
48.71
49.48
44.17
30.97
14.03
20.23
1991
19.35
19.32
23.13
32.77
37.84
44.43
49.23
45.65
45.57
32.55
27.73
22.84
1992
23.81
15.41
22.52
29.57
36.35
46.77
50.19
48.97
36.00
29.81
27.57
18.58
1993
19.29
22.07
28.00
33.97
41.58
44.87
49.55
49.74
43.87
34.97
27.20
27.84
1994
26.00
17.36
22.94
32.93
39.61
45.33
49.19
48.97
40.63
32.00
19.87
19.94
1995
19.94
20.82
16.35
34.57
40.16
45.70
49.61
47.35
46.83
35.81
20.70
23.61
1996
13.35
16.52
26.90
31.37
37.29
44.37
48.35
47.19
39.40
25.23
24.80
15.68
1997
15.94
32.11
21.26
32.03
38.94
44.63
51.19
49.90
44.23
26.16
29.63
14.90
1998
17.48
25.61
27.68
31.53
38.26
44.60
48.42
45.77
41.93
32.52
26.37
16.87
1999
14.48
5.54
17.97
29.00
34.81
43.97
48.10
47.48
42.77
30.94
21.10
17.19
2000
11.94
27.07
26.61
29.57
36.13
44.03
48.23
44.87
39.20
33.03
31.20
30.55
2001
28.47
24.94
27.87
31.46
33.79
42.49
48.03
47.09
41.80
27.93
21.80
13.29
2002
24.73
22.82
20.68
27.03
36.22
43.69
47.95
47.11
43.70
38.86
33.97
23.93
2003
26.35
31.81
21.75
31.56
36.78
44.48
50.60
47.94
38.62
36.68
24.41
18.82
2004
11.29
27.97
22.55
33.00
42.06
46.60
51.49
49.33
39.23
36.66
29.59
25.93
2005
23.10
20.75
27.95
31.80
41.54
45.34
50.91
50.10
45.26
33.46
17.63
27.70
2006
14.82
21.98
22.10
31.79
38.61
44.70
48.86
47.19
42.70
36.42
10.96
20.32
2007
14.16
17.68
8.06
31.47
35.42
42.50
47.71
47.32
43.30
31.19
29.57
20.61
2008
14.54
12.93
27.94
27.43
36.83
42.28
47.02
46.10
43.39
28.14
21.93
18.52
2009
14.44
14.88
20.38
29.37
35.68
41.34
48.29
45.70
41.36
36.06
21.43
23.86
2010
21.00
26.20
21.27
30.39
36.03
43.23
46.83
46.76
40.08
30.66
24.20
11.86
2011
19.08
17.38
16.39
29.12
35.32
43.40
45.29
46.09
40.99
32.31
15.87
21.37
2012
2.66
22.60
16.88
29.34
35.26
42.59
44.67
45.88
44.94
30.92
19.81
17.90
2013
25.11
26.19
24.91
24.67
35.83
46.22
48.20
51.33
45.01
40.76
25.44
17.93
2014
33.35
20.29
25.13
32.39
40.82
45.93
50.39
51.84
45.78
32.70
34.15
32.25
2015
25.15
25.78
30.07
35.59
42.96
50.36
49.67
47.10
38.66
37.17
26.15
22.81
2016
29.16
30.69
31.43
36.49
41.37
47.24
52.31
51.91
44.23
35.99
26.37
20.51
2017
18.62
21.22
15.19
34.02
39.92
47.39
50.97
49.10
44.32
35.51
19.70
27.93
2018
20.85
21.07
24.51
33.37
39.52
45.71
50.23
50.69
42.63
38.79
29.03
22.80
2019
23.40
26.51
32.97
31.87
41.32
46.20
51.58
48.10
43.03
35.71
34.90
24.52
2020
4.48
19.28
19.56
31.90
38.48
43.60
50.26
49.94
46.52
34.14
24.64
24.90
2021
26.39
20.96
17.90
28.97
36.84
44.77
49.26
47.03
39.07
34.03
14.90
16.77
2022
16.97
28.21
30.55
31.10
37.65
45.30
50.13
50.10
44.23
34.77
25.07
19.03
2023
26.39
19.71
22.03
28.00
38.74
46.83
50.16
50.52
41.53
33.45
27.93
17.61
2024
16.61
23.76
25.55
30.80
38.68
46.20
49.45
48.06
44.10
33.42
24.00
30.48
2025
28.58
24.82
30.45
M
M
M
M
M
M
M
M
M
NCEI Climatology
19.00
21.71
23.10
31.29
38.20
44.70
49.20
48.01
42.30
33.30
24.80
21.40
Average Daily Temperature (high+low)/2 [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
50.65
49.50
44.20
37.63
21.78
17.45
1949
19.98
16.29
31.97
31.55
39.15
47.07
50.63
51.63
47.62
37.39
32.13
18.21
1950
20.84
16.43
32.85
35.13
40.42
47.48
50.66
52.87
47.22
36.69
21.05
20.65
1951
16.26
23.23
18.63
36.17
41.58
48.25
52.18
52.82
47.57
35.35
30.10
21.34
1952
14.40
26.50
26.98
33.08
38.63
45.28
52.08
52.35
47.02
40.06
35.48
25.71
1953
18.98
26.39
26.65
37.15
42.15
52.17
54.42
53.48
47.23
36.05
29.30
27.56
1954
18.40
14.50
26.48
32.77
43.63
49.25
52.81
52.42
48.50
41.21
33.02
14.61
1955
27.61
23.48
29.52
31.57
41.58
46.27
51.37
51.50
46.23
35.26
22.43
15.23
1956
14.29
17.50
22.81
33.98
41.35
46.73
51.85
51.76
45.35
32.39
23.55
14.84
1957
23.97
21.04
32.53
36.58
42.84
50.88
52.84
53.63
48.65
41.40
37.67
18.76
1958
26.87
29.29
33.35
38.30
44.47
50.58
53.60
52.73
45.55
34.21
26.92
25.05
1959
19.44
29.14
17.84
33.57
42.89
49.60
52.21
52.90
46.83
37.87
32.05
23.74
1960
25.58
30.66
26.53
33.72
45.37
48.30
53.27
51.21
46.32
38.79
27.58
32.60
1961
27.74
23.16
20.52
35.42
43.06
49.63
52.90
52.19
48.00
33.98
25.30
14.29
1962
22.02
26.75
25.32
36.47
41.55
48.70
53.32
53.06
44.57
38.89
29.58
23.89
1963
27.50
27.29
28.69
33.32
43.47
47.22
53.97
53.87
49.90
38.85
20.10
32.29
1964
24.35
25.62
24.16
34.23
39.23
50.43
52.13
52.87
48.78
38.32
28.63
12.37
1965
19.60
19.66
35.90
36.05
40.79
46.03
51.13
51.32
50.88
33.58
27.27
18.97
1966
23.06
23.21
19.40
35.57
39.89
49.33
52.50
51.85
48.55
35.00
27.73
20.66
1967
18.76
23.36
30.31
36.58
44.47
50.35
55.31
54.97
48.27
37.47
33.70
23.03
1968
18.90
27.60
30.34
34.43
43.89
49.72
53.60
54.16
45.80
35.74
31.93
15.98
1969
14.16
22.70
31.84
38.75
44.08
51.07
53.61
50.87
47.48
42.61
27.77
33.92
1970
16.73
33.38
35.60
35.02
44.02
49.50
51.94
51.37
45.53
34.81
33.00
19.82
1971
10.27
24.25
18.69
32.75
38.82
46.62
52.23
53.71
46.22
37.16
26.22
23.21
1972
15.90
19.50
16.24
27.47
40.60
46.93
52.74
53.63
47.33
38.19
30.48
22.34
1973
12.45
22.05
28.29
37.80
42.19
48.62
52.87
51.94
46.12
36.27
23.17
24.68
1974
14.69
19.89
26.42
36.67
42.98
50.00
53.39
54.11
50.20
38.23
30.03
24.53
1975
18.73
18.57
26.42
33.03
42.10
48.47
52.82
52.48
48.15
37.11
22.48
19.39
1976
22.40
21.10
26.81
35.30
42.16
48.42
54.08
52.94
46.78
36.66
35.55
31.40
1977
37.08
35.70
27.23
35.22
41.69
51.53
54.92
56.50
48.97
38.92
21.35
17.10
1978
30.03
30.77
31.97
38.35
44.48
49.75
53.27
54.95
47.57
40.68
32.00
29.82
1979
30.74
15.79
33.26
38.50
43.94
48.97
55.34
54.85
50.90
42.71
36.12
18.90
1980
19.24
31.45
32.26
39.40
44.50
49.97
52.29
49.68
48.18
39.95
32.30
12.71
1981
35.56
28.98
36.18
37.32
47.18
49.87
54.61
53.87
47.52
39.58
30.08
25.19
1982
21.13
20.82
30.60
33.50
41.97
49.17
52.82
52.69
48.47
32.81
32.55
32.35
1983
23.50
30.52
36.10
38.43
46.10
51.90
54.81
54.31
46.85
38.85
34.68
29.34
1984
26.95
22.74
38.08
36.50
44.03
52.33
54.61
55.11
49.22
39.60
30.27
30.73
1985
36.13
20.79
30.32
28.13
41.37
46.87
53.56
51.94
47.70
33.10
25.12
35.40
1986
30.13
27.12
27.02
32.10
42.06
49.95
53.29
52.55
48.10
40.56
32.12
33.90
1987
29.85
32.25
31.68
36.77
44.34
49.97
54.69
54.74
46.30
39.63
31.35
25.03
1988
27.85
30.47
33.52
36.63
44.98
51.20
55.39
53.89
46.38
37.50
26.72
27.60
1989
10.92
25.84
27.56
37.87
43.48
49.92
55.47
56.47
51.05
38.15
25.98
30.23
1990
22.65
14.23
32.50
40.02
46.52
51.47
54.65
55.10
49.27
37.15
20.62
25.74
1991
24.53
25.18
29.65
38.67
43.73
50.33
54.21
52.65
50.38
39.11
32.70
27.39
1992
28.15
21.02
28.18
36.52
43.37
52.30
55.58
53.95
42.90
36.39
32.05
23.81
1993
24.45
27.38
33.40
40.60
48.05
51.13
56.61
55.81
49.38
40.90
32.78
32.55
1994
30.11
23.43
28.15
39.07
45.23
51.92
54.85
55.29
47.72
37.32
25.53
25.37
1995
25.19
26.38
23.45
40.92
45.89
51.53
54.97
53.68
52.02
41.19
26.72
28.23
1996
18.97
23.31
33.58
38.33
44.90
50.78
54.85
53.85
46.58
32.24
29.88
21.56
1997
22.61
35.82
28.63
39.40
47.39
52.35
57.47
56.47
51.10
33.82
34.92
21.81
1998
23.55
30.93
34.35
37.77
43.48
51.73
54.19
52.05
47.93
39.40
31.95
22.58
1999
20.26
13.16
24.66
34.75
41.47
50.17
54.21
53.47
48.65
36.42
27.05
22.37
2000
17.90
32.43
32.13
36.93
43.72
50.32
53.27
52.32
46.25
38.52
36.00
35.03
2001
32.87
30.89
32.56
38.21
41.64
51.45
54.06
54.43
48.61
34.18
27.96
19.65
2002
29.73
28.71
27.66
34.80
44.78
51.00
55.23
53.57
50.95
44.58
39.42
29.05
2003
32.37
36.72
28.49
39.06
44.96
51.11
57.36
55.33
47.62
42.86
30.10
25.00
2004
18.02
32.79
28.15
38.77
47.71
53.12
57.75
57.49
46.52
42.01
34.70
31.08
2005
29.11
27.96
34.02
40.03
49.07
53.64
57.98
56.32
51.00
39.41
23.81
33.22
2006
20.49
27.83
28.11
37.15
45.82
50.50
53.99
52.26
48.75
41.65
18.55
25.45
2007
20.97
23.93
16.52
38.08
42.95
49.67
53.76
54.18
49.68
37.82
34.70
26.87
2008
21.29
20.67
32.86
33.89
43.46
48.36
52.51
52.64
48.61
34.56
27.23
23.81
2009
20.56
22.13
26.51
36.10
44.46
49.54
54.81
52.82
47.95
42.11
27.30
29.11
2010
26.68
31.30
27.62
36.12
43.30
49.04
52.10
52.59
47.26
37.52
29.72
18.33
2011
24.98
23.68
25.25
35.37
43.28
48.33
52.34
51.67
46.93
38.31
21.65
26.09
2012
9.30
28.04
22.94
36.14
41.16
48.14
50.50
51.62
49.96
37.09
25.82
23.66
2013
30.63
31.34
30.29
31.76
43.16
53.35
56.67
56.81
51.20
46.26
31.61
24.51
2014
38.65
26.75
32.44
40.12
50.26
52.27
57.67
58.10
53.40
39.88
39.81
37.00
2015
30.82
32.77
36.76
42.05
49.89
57.94
56.29
55.42
45.78
43.17
32.42
27.92
2016
33.85
35.62
37.58
43.04
49.12
54.77
58.09
58.42
51.56
43.25
32.64
26.31
2017
24.50
27.85
24.17
41.90
47.55
54.50
57.39
54.89
50.19
41.54
27.30
33.90
2018
26.69
28.17
31.41
40.30
45.48
52.19
56.70
56.62
50.48
44.92
35.85
28.83
2019
28.13
31.49
38.87
38.96
47.47
54.07
58.60
56.77
50.20
41.88
39.83
30.61
2020
11.76
25.74
26.99
39.35
47.13
51.22
57.37
55.91
51.86
40.65
30.81
30.89
2021
31.52
26.07
25.53
37.18
44.92
51.55
55.48
53.89
46.75
39.94
20.62
23.73
2022
22.94
33.35
35.51
38.00
46.18
54.18
56.31
55.15
50.02
40.55
31.10
25.65
2023
31.35
26.32
28.81
34.45
44.63
52.32
56.02
56.84
48.35
39.97
34.72
24.58
2024
23.23
30.09
31.45
37.77
44.81
53.45
55.52
54.84
50.43
39.85
30.07
35.50
2025
33.69
32.02
36.84
M
M
M
M
M
M
M
M
M
NCEI Climatology
25.40
28.32
30.10
38.69
46.00
52.00
56.15
55.30
49.50
40.20
31.20
27.70
Average Relative Humidity [%]
This value is computed via a simple average of available observations weighted
by the duration between observations.
