Freezing Dates
Using the NWS COOP data archive, significant dates relating to fall are
extracted and presented on this page. The specific dates are the first
occurance of that temperature and may have occured again in subsequent
years.
The "Record Lows" columns show the first fall occurance of a low
temperature. The "Average Lows" column shows when certain climatological
thresholds are surpassed in the fall.
COOP Site: | Record Lows: | Average Lows: | |||||
---|---|---|---|---|---|---|---|
Temp <= 32°F | Temp <= 28°F | Below 40°F | Below 32°F | Below 28°F | Temp: | Date: | Temp: | Date: |
HOLSTEIN 5 NNW | 30 | {2020}-10-02 | 28 | {2019}-10-12 | 10-08 | 10-15 | 10-27 |
BATTLE CREEK 3NE | 32 | {2014}-09-13 | 24 | {2012}-09-23 | 10-04 | 10-17 | 10-31 |
ROCK-RAPIDS | 31 | {1974}-09-03 | 26 | {1894}-09-10 | 10-07 | 10-24 | 11-05 |
LITTLE SIOUX 2NW | 31 | {2007}-09-15 | 27 | {2012}-09-23 | 10-08 | 10-25 | 11-01 |
Spencer Airport | -1 | {2010}-08-16 | -1 | {2010}-08-16 | 10-09 | 10-26 | 11-10 |
SIBLEY-5-NNE | 30 | {1950}-08-20 | 23 | {1955}-09-11 | 10-07 | 10-26 | 11-03 |
ESTHERVILLE MUNICIPAL AP | 31 | {2014}-09-13 | 28 | {2007}-09-15 | 10-10 | 10-26 | 11-07 |
Spencer Area | -1 | {2010}-08-16 | -1 | {2010}-08-16 | 10-09 | 10-27 | 11-08 |
SIOUX-RAPIDS | 31 | {1974}-09-03 | 28 | {1991}-09-19 | 10-09 | 10-27 | 11-07 |
CHEROKEE | 31 | {1974}-09-03 | 27 | {1955}-09-11 | 10-07 | 10-27 | 11-07 |
Spencer | 31 | {1974}-09-03 | 28 | {2007}-09-15 | 10-09 | 10-27 | 11-08 |
SANBORN | 32 | {1974}-09-03 | 25 | {1929}-09-18 | 10-10 | 10-27 | 11-07 |
Estherville 4E | 32 | {1924}-09-09 | 27 | {1929}-09-18 | 10-07 | 10-27 | 11-06 |
STANLEY | 31 | {2014}-09-13 | 26 | {2012}-09-23 | 10-11 | 10-27 | 11-01 |
SIOUX CITY ANG | 31 | {2012}-09-23 | 20 | {2004}-10-02 | 10-11 | 10-27 | 11-10 |
Elkader 6SSW (Osborn) | 32 | {1893}-08-29 | 0 | {2002}-09-02 | 10-09 | 10-28 | 11-10 |
MASON-CITY | 30 | {1915}-08-30 | 28 | {1923}-09-14 | 10-10 | 10-28 | 11-09 |
FOREST-CITY | 31 | {1949}-09-01 | 27 | {1929}-09-18 | 10-13 | 10-28 | 11-10 |
FAYETTE | 32 | {1949}-09-01 | 27 | {1902}-09-12 | 10-10 | 10-28 | 11-10 |
POCAHONTAS | 31 | {1946}-09-02 | 27 | {1929}-09-18 | 10-10 | 10-28 | 11-10 |
CARROLL-2-SSW | 28 | {1974}-09-03 | 28 | {1974}-09-03 | 10-16 | 10-28 | 11-10 |
SIOUX CENTER 2 SE | 31 | {1974}-09-03 | 24 | {1991}-09-19 | 10-16 | 10-28 | 11-10 |
Ida Grove Area | 32 | {1974}-09-03 | 27 | {1918}-09-20 | 10-16 | 10-28 | 11-10 |
WEBSTER-CITY | 30 | {1955}-09-11 | 25 | {1929}-09-18 | 10-12 | 10-28 | 11-10 |
NORTHWOOD | 32 | {1953}-09-13 | 28 | {1929}-09-18 | 10-10 | 10-28 | 11-08 |
MASON CITY MUNICIPAL AP | 31 | {2014}-09-13 | 26 | {2011}-09-15 | 10-09 | 10-28 | 11-07 |
OELWEIN 1E | 32 | {2011}-09-15 | 28 | {2012}-10-05 | 10-13 | 10-28 | 11-11 |
SWEA CITY 4 W | 32 | {1974}-09-03 | 26 | {1974}-09-22 | 10-09 | 10-29 | 11-10 |
Le Mars | 31 | {1955}-09-11 | 28 | {1902}-09-12 | 10-12 | 10-29 | 11-08 |
DAVENPORT WFO | 30 | {2012}-09-23 | 27 | {2012}-10-05 | 10-15 | 10-29 | 11-11 |
ANAMOSA 3 SSW | 30 | {2012}-09-24 | 26 | {2015}-10-17 | 10-15 | 10-29 | 11-12 |
Milford | 32 | {1974}-09-03 | 28 | {1929}-09-18 | 10-10 | 10-31 | 11-08 |
Iowa - Northwest Climate Division | 30 | {1902}-09-12 | 26 | {1918}-09-20 | 10-13 | 10-31 | 11-10 |
PRIMGHAR | 30 | {1902}-09-12 | 25 | {1901}-09-18 | 10-16 | 10-31 | 11-10 |
AMES MUNICIPAL AP | 31 | {2007}-09-15 | 27 | {2003}-09-30 | 10-14 | 10-31 | 11-11 |
MARSHALLTOWN MUNICIPAL AP | 30 | {2007}-09-15 | 27 | {2012}-09-23 | 10-14 | 10-31 | 11-11 |
DECORAH-2-N | 32 | {1915}-08-30 | 28 | {1946}-09-02 | 10-10 | 11-01 | 11-11 |
IOWA-FALLS | 31 | {1915}-08-30 | 28 | {1894}-09-18 | 10-12 | 11-01 | 11-10 |
NEW-HAMPTON | 28 | {1949}-09-01 | 28 | {1949}-09-01 | 10-13 | 11-01 | 11-10 |
ATLANTIC-1-NE | 30 | {1893}-09-02 | 28 | {1902,1955}-09-12 | 10-16 | 11-01 | 11-10 |
ALGONA | 29 | {1893}-09-02 | 27 | {1929}-09-18 | 10-17 | 11-01 | 11-10 |
Emmetsburg | 0 | {2005}-09-03 | 0 | {2005}-09-03 | 10-13 | 11-01 | 11-10 |
SAC-CITY | 32 | {1974}-09-03 | 28 | {1918}-09-20 | 10-16 | 11-01 | 11-11 |
HAMPTON-2-NW | 32 | {1955}-09-11 | 28 | {1955}-09-12 | 10-12 | 11-01 | 11-10 |
AUDUBON | 30 | {1902,1955}-09-12 | 27 | {1896}-09-19 | 10-17 | 11-01 | 11-10 |
SPIRIT LAKE | 31 | {1902}-09-12 | 28 | {1929}-09-18 | 10-17 | 11-01 | 11-10 |
STORM-LAKE-2-E | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-17 | 11-01 | 11-10 |
Iowa Drought Region 1 - Northwest | 30 | {1902}-09-12 | 25 | {1918}-09-20 | 10-17 | 11-01 | 11-10 |
LOWDEN | 32 | {2014}-09-13 | 26 | {2012}-09-24 | 10-14 | 11-01 | 11-11 |
OSAGE | 30 | {1949}-09-14 | 28 | {1929}-09-18 | 10-13 | 11-01 | 11-10 |
JEFFERSON | 32 | {1893}-08-29 | 28 | {1929}-09-18 | 10-17 | 11-02 | 11-11 |
ALLISON | 32 | {1915}-08-30 | 28 | {1926}-09-25 | 10-17 | 11-02 | 11-11 |
Postville | 32 | {1919}-09-02 | 20 | {1918}-09-21 | 10-17 | 11-02 | 11-11 |
FORT-DODGE | 32 | {1974}-09-03 | 27 | {1902}-09-13 | 10-16 | 11-02 | 11-11 |
GRINNELL-3-SW | 31 | {1976}-09-10 | 27 | {1991}-09-20 | 10-17 | 11-02 | 11-11 |
Waterloo Area | 32 | {1917}-09-11 | 28 | {1929}-09-18 | 10-13 | 11-02 | 11-11 |
Oelwein Area | 28 | {1955}-09-11 | 28 | {1955}-09-11 | 10-10 | 11-02 | 11-11 |
TOLEDO | 31 | {1917}-09-11 | 27 | {1896}-09-20 | 10-17 | 11-02 | 11-11 |
MAPLETON NO. 2 | 31 | {1955}-09-11 | 27 | {1991}-09-19 | 10-15 | 11-02 | 11-10 |
WATERLOO | 32 | {1917}-09-11 | 28 | {1929}-09-18 | 10-13 | 11-02 | 11-10 |
MAQUOKETA-2-W | 31 | {1917}-09-11 | 28 | {1983}-09-23 | 10-17 | 11-02 | 11-12 |
Boone | 32 | {1975}-09-12 | 27 | {1929}-09-18 | 10-17 | 11-02 | 11-11 |
Iowa Drought Region 2 - Northcentral | 32 | {1902}-09-12 | 27 | {1913}-09-22 | 10-17 | 11-02 | 11-11 |
Iowa - West Central Climate Division | 31 | {1902}-09-12 | 28 | {1918}-09-20 | 10-17 | 11-02 | 11-11 |
PERRY | 32 | {1955}-09-12 | 27 | {1929}-09-18 | 10-17 | 11-02 | 11-11 |
MARSHALLTOWN | 31 | {1955}-09-12 | 28 | {1896}-09-20 | 10-13 | 11-02 | 11-11 |
CHARLES-CITY | 32 | {1902,1955}-09-12 | 28 | {1991}-09-20 | 10-16 | 11-02 | 11-11 |
LOGAN | 30 | {1902}-09-12 | 28 | {1902}-09-13 | 10-17 | 11-02 | 11-11 |
GUTHRIE-CENTER | 31 | {1902}-09-12 | 28 | {1991}-09-19 | 10-17 | 11-02 | 11-11 |
GRUNDY-CENTER | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-13 | 11-02 | 11-11 |
DENISON | 29 | {1902}-09-12 | 21 | {1918}-09-21 | 10-18 | 11-02 | 11-11 |
MANCHESTER-2 | 32 | {2014}-09-13 | 27 | {1984}-09-16 | 10-13 | 11-02 | 11-11 |
Ames Area | 31 | {1902}-09-13 | 26 | {1918}-09-21 | 10-17 | 11-02 | 11-11 |
Iowa - North Central Climate Division | 32 | {1902,2014}-09-13 | 28 | {1929}-09-18 | 10-17 | 11-02 | 11-10 |
Sioux City Area | 30 | {1902}-09-13 | 25 | {1995}-09-22 | 10-17 | 11-02 | 11-10 |
SIOUX-CITY-WSO-AP | 30 | {1902}-09-13 | 25 | {1995}-09-22 | 10-17 | 11-02 | 11-10 |
Iowa - Northeast Climate Division | 32 | {1902}-09-13 | 26 | {1926}-09-26 | 10-17 | 11-02 | 11-11 |
AMES-8-WSW | 31 | {1902}-09-13 | 26 | {1918}-09-21 | 10-18 | 11-02 | 11-12 |
CLARINDA | 31 | {1902}-09-13 | 28 | {1918}-09-21 | 10-18 | 11-02 | 11-19 |
WAUKON | 32 | {1937,2011}-09-16 | 25 | {1942}-09-25 | 10-13 | 11-02 | 11-10 |
CASCADE | 32 | {2023}-08-31 | 28 | {1953,1974}-09-22 | 10-10 | 11-03 | 11-11 |
OAKLAND-2-E | 32 | {1974}-09-03 | 28 | {1995}-09-22 | 10-17 | 11-03 | 11-11 |
WILLIAMSBURG | 32 | {1917}-09-11 | 28 | {1991}-09-20 | 10-18 | 11-03 | 11-12 |
RED-OAK | 32 | {1940}-09-11 | 28 | {1995}-09-22 | 10-19 | 11-03 | 11-21 |
BELLE-PLAINE | 31 | {1917}-09-11 | 28 | {1916,1929}-09-18 | 10-17 | 11-03 | 11-12 |
CORNING | 32 | {1902}-09-12 | 27 | {1983}-09-21 | 10-17 | 11-03 | 11-13 |
VINTON | 32 | {1902,1953}-09-13 | 28 | {1982}-09-21 | 10-17 | 11-03 | 11-12 |
Iowa Drought Region 3 - Northeast | 32 | {1902}-09-13 | 27 | {1926}-09-26 | 10-19 | 11-03 | 11-12 |
Iowa Average | 32 | {1902}-09-13 | 24 | {1942}-09-28 | 10-19 | 11-03 | 11-11 |
Cedar Rapids Area | 31 | {2007}-09-15 | 28 | {2012}-09-24 | 10-18 | 11-03 | 11-19 |
Creston | 31 | {1924}-09-15 | 28 | {1991}-09-19 | 10-18 | 11-03 | 11-13 |
Dubuque Airport | 32 | {2007}-09-15 | 28 | {1956}-09-20 | 10-16 | 11-03 | 11-13 |
Iowa - Central Climate Division | 31 | {1929}-09-18 | 28 | {1913}-09-22 | 10-19 | 11-03 | 11-11 |
AMES 5 SE | 32 | {1902}-09-13 | 28 | {1926}-09-26 | 10-19 | 11-04 | 11-20 |
CHARITON | 32 | {1955}-09-12 | 28 | {1918,1991}-09-20 | 10-17 | 11-05 | 11-21 |
Iowa Drought Region 4 - Southwest | 32 | {1902}-09-12 | 26 | {1942}-09-28 | 10-19 | 11-05 | 11-19 |
MOUNT-AYR | 32 | {1902}-09-13 | 28 | {1991}-09-19 | 10-19 | 11-05 | 11-19 |
Cedar Rapids Airport | 31 | {2007}-09-15 | 28 | {2012}-09-24 | 10-17 | 11-05 | 11-13 |
Dubuque Area | 32 | {2007}-09-15 | 28 | {1956}-09-20 | 10-19 | 11-05 | 11-21 |
BEACONSFIELD | 27 | {1991}-09-19 | 27 | {1991}-09-19 | 10-19 | 11-05 | 11-20 |
BELLEVUE-L-AND-D-12 | 32 | {1986}-08-30 | 28 | {1974,1995}-09-23 | 10-17 | 11-06 | 11-21 |
Iowa City | 32 | {1923}-09-14 | 28 | {1916}-09-18 | 10-19 | 11-06 | 11-21 |
CEDAR-RAPIDS-1 | 32 | {2007}-09-15 | 24 | {1926}-09-26 | 10-20 | 11-06 | 11-21 |
Iowa - East Central Climate Division | 32 | {1929}-09-18 | 28 | {1926}-09-26 | 10-20 | 11-06 | 11-21 |
NEWTON | 32 | {1929}-09-18 | 23 | {1942}-09-28 | 10-20 | 11-06 | 11-21 |
RATHBUN DAM | 0 | {2012}-08-09 | 0 | {2012}-08-09 | 10-17 | 11-07 | 11-21 |
WINTERSET | 31 | {1955}-09-12 | 26 | {1896}-09-20 | 10-19 | 11-07 | 11-21 |
OSCEOLA-3-WSW | 31 | {2007}-09-15 | 28 | {1974}-09-22 | 10-19 | 11-07 | 11-21 |
SHENANDOAH-1-NE | 32 | {1937}-09-16 | 28 | {1918}-09-20 | 10-19 | 11-07 | 11-21 |
GUTTENBERG-L-AND-D-10 | 32 | {1973}-09-18 | 25 | {1942}-09-28 | 10-24 | 11-07 | 11-21 |
IOWA CITY MUNICIPAL AP | 32 | {1991}-09-20 | 26 | {1995}-09-23 | 10-19 | 11-07 | 11-21 |
FAIRFIELD | 32 | {1917}-09-11 | 28 | {1918}-09-21 | 10-24 | 11-08 | 11-22 |
COLUMBUS JUNCT 2 SSW | 31 | {1955}-09-12 | 28 | {1991}-09-20 | 10-24 | 11-08 | 11-22 |
Iowa - Southwest Climate Division | 32 | {1902}-09-13 | 26 | {1942}-09-28 | 10-24 | 11-08 | 11-21 |
WASHINGTON | 30 | {1902}-09-13 | 28 | {1983}-09-23 | 10-24 | 11-08 | 11-21 |
OSKALOOSA | 31 | {1902}-09-13 | 27 | {1991}-09-20 | 10-19 | 11-08 | 11-21 |
SIGOURNEY | 32 | {1902}-09-13 | 25 | {1913}-09-21 | 10-19 | 11-08 | 11-22 |
GREENFIELD | 32 | {1981}-09-17 | 27 | {1913}-09-22 | 10-19 | 11-08 | 11-21 |
Lamoni | 32 | {1901}-09-18 | 27 | {1942}-09-28 | 10-24 | 11-08 | 11-21 |
Allerton | 31 | {1991}-09-19 | 27 | {1913}-09-22 | 10-19 | 11-08 | 11-21 |
Iowa - South Central Climate Division | 32 | {1918}-09-21 | 25 | {1942}-09-28 | 10-25 | 11-08 | 11-21 |
Iowa Drought Region 5 - Southeast | 32 | {1918}-09-21 | 24 | {1942}-09-28 | 10-25 | 11-08 | 11-21 |
Des Moines Airport | 31 | {1995}-09-22 | 26 | {1942}-09-28 | 10-24 | 11-08 | 11-21 |
Des Moines Area | 31 | {1995}-09-22 | 26 | {1942}-09-28 | 10-24 | 11-08 | 11-21 |
CLINTON-1 | 31 | {1902}-09-13 | 28 | {1928}-09-25 | 10-20 | 11-09 | 11-22 |
Ottumwa | 32 | {2007}-09-15 | 23 | {1942}-09-28 | 10-24 | 11-09 | 11-22 |
Iowa - Southeast Climate Division | 32 | {1896}-09-20 | 25 | {1942}-09-28 | 10-25 | 11-09 | 11-22 |
KEOSAUQUA | 31 | {1917}-09-11 | 28 | {1916}-09-18 | 10-24 | 11-10 | 11-22 |
MOUNT-PLEASANT | 32 | {1902}-09-13 | 28 | {1942}-09-24 | 10-25 | 11-10 | 11-22 |
CENTERVILLE | 31 | {1913}-09-13 | 28 | {1913}-09-22 | 10-25 | 11-10 | 11-22 |
Burlington Airport | 30 | {1918}-09-18 | 25 | {1942}-09-28 | 10-27 | 11-10 | 11-24 |
MUSCATINE | 29 | {1991}-09-20 | 23 | {1942}-09-28 | 10-25 | 11-10 | 11-21 |
DUBUQUE-LOCK-AND-DAM | 31 | {1956}-09-20 | 24 | {1899}-09-30 | 10-25 | 11-10 | 11-22 |
Donnellson | 31 | {1991}-09-20 | 25 | {1942}-09-28 | 10-19 | 11-10 | 11-22 |
DES MOINES WSFO-JOHNSTON | 31 | {1999}-09-21 | 28 | {2004}-10-02 | 10-21 | 11-10 | 11-12 |
LAMONI | -1 | {2011,2012}-08-07 | -1 | {2011,2012}-08-07 | 10-26 | 11-11 | 11-21 |
Fort Madison | 32 | {1913}-09-22 | 26 | {1942}-09-28 | 10-27 | 11-11 | 11-24 |
Le Claire L&D 14 | 32 | {1942}-09-26 | 28 | {1942}-09-28 | 10-28 | 11-11 | 11-23 |
BURLINGTON | 32 | {1984}-09-26 | 28 | {1974}-10-02 | 10-28 | 11-11 | 11-27 |
MUSCATINE 2N | 27 | {2003}-10-02 | 27 | {2003}-10-02 | 10-17 | 11-11 | 11-22 |