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Data Calendar for Mason City US18

The calendar chart below shows the daily reported climate variables. You can click on a date to display the values for all sites for that day. Time stamps are displayed in the America/Chicago timezone. Wind speeds are in mph and temperatures in Fahrenheit. Values flagged with a (E) are estimated by the IEM.

Year:  

Month:  

 

Dec 2025Jan 2026 Feb 2026
SundayMondayTuesdayWednesday ThursdayFridaySaturday
2829303101
High: 17
Low: 3
Precip: 0.00
Avg Wind: NW @ 6.2
Gust: 17 (9:45 PM)
RH% Min/Max: 66-97
Feel Min/Max: -7 to 17		02
High: 18
Low: 14
Precip: 0.00
Avg Wind: NNW @ 6.0
Gust: 15 (3:00 AM)
RH% Min/Max: 75-97
Feel Min/Max: 1 to 18		03
High: 21
Low: 14
Precip: 0.00
Avg Wind: WNW @ 4.7
Gust: 13 (3:50 PM)
RH% Min/Max: 72-95
Feel Min/Max: 4 to 18
04

Precip: 0.00
Avg Wind: SSE @ 11.0
Gust: 28 (12:00 PM)
RH% Min/Max: 87-98		05
High: 42
Low: 30
Precip: 0.00
Avg Wind: E @ 5.6
Gust: 12 (4:30 PM)
RH% Min/Max: 71-100
Feel Min/Max: 24 to 39		06
High: 36
Low: 27
Precip: 0.00
Avg Wind: WNW @ 7.4
Gust: 27 (1:50 PM)
RH% Min/Max: 89-100
Feel Min/Max: 20 to 35		07
High: 46
Low: 27
Precip: 0.00
Avg Wind: ESE @ 6.1
Gust: 20 (12:40 PM)
RH% Min/Max: 68-100
Feel Min/Max: 22 to 44		08
High: 42
Low: 31
Precip: 0.00
Avg Wind: N @ 8.3
Gust: 30 (8:05 PM)
RH% Min/Max: 89-99
Feel Min/Max: 22 to 42		09
High: 35
Low: 28
Precip: 0.00
Avg Wind: NW @ 10.1
Gust: 28 (3:50 AM)
RH% Min/Max: 72-99
Feel Min/Max: 18 to 31		10
High: 36
Low: 19
Precip: 0.00
Avg Wind: WNW @ 16.7
Gust: 36 (5:15 PM)
RH% Min/Max: 66-99
Feel Min/Max: 1 to 27
11
High: 30
Low: 17
Precip: 0.00
Avg Wind: W @ 12.9
Gust: 32 (1:45 AM)
RH% Min/Max: 75-92
Feel Min/Max: 0 to 24		12
High: 44
Low: 28
Precip: 0.00
Avg Wind: WSW @ 9.9
Gust: 24 (12:20 AM)
RH% Min/Max: 65-94
Feel Min/Max: 17 to 39		13
High: 48
Low: 33
Precip: 0.00
Avg Wind: WNW @ 18.3
Gust: 36 (2:10 PM)
RH% Min/Max: 70-87
Feel Min/Max: 20 to 42		14
High: 33
Low: 13
Precip: 0.00
Avg Wind: NW @ 17.3
Gust: 38 (3:50 AM)
RH% Min/Max: 52-99
Feel Min/Max: -1 to 24		15
High: 13
Low: 12
Precip: 0.00
Gust: 11 (12:00 AM)
RH% Min/Max: 77-84
Feel Min/Max: 0 to 12		16

Precip: M		17
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25262728293031

The data presented here provided by IEM API webservice: daily.json. A simple CSV option exists as well.

Daily High/Low Plot


Description: This chart of the monthly temperature data. The bars are the observations and the dots are climatology.

Daily Rainfall


Description: This chart is of daily precipitation for the month. The red line would be an average month while the blue line and bars are observations.

Daily Average Wind Speeds


Description: This chart is of the daily average wind speeds.

The data presented here provided by IEM API webservice: daily.json. A simple CSV option exists as well.