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: |
BATTLE CREEK 3NE | 32 | {2014}-09-13 | 24 | {2012}-09-23 | 10-04 | 10-15 | 10-31 |
ROCK-RAPIDS | 31 | {1974}-09-03 | 26 | {1894}-09-10 | 10-07 | 10-24 | 11-05 |
ESTHERVILLE MUNICIPAL AP | 31 | {2014}-09-13 | 28 | {2007}-09-15 | 10-10 | 10-24 | 11-07 |
Spencer Airport | 32 | {2014}-09-13 | 28 | {2007}-09-15 | 10-04 | 10-24 | 11-10 |
LITTLE SIOUX 2NW | 31 | {2007}-09-15 | 27 | {2012}-09-23 | 10-08 | 10-25 | 11-11 |
HOLSTEIN 5 NNW | 30 | {2020}-10-02 | 28 | {2019}-10-12 | 10-12 | 10-25 | 11-10 |
SIBLEY-5-NNE | 30 | {1950}-08-20 | 23 | -09-11 | 10-07 | 10-26 | 11-03 |
STANLEY | 31 | {2014}-09-13 | 26 | {2012}-09-23 | 10-11 | 10-26 | 11-11 |
SIOUX CITY ANG | 31 | {2012}-09-23 | 20 | {2004}-10-02 | 10-12 | 10-26 | 11-10 |
Elkader 6SSW (Osborn) | 32 | {1893}-08-29 | 0 | {2002}-09-02 | 10-09 | 10-27 | 11-10 |
CHEROKEE | 31 | {1974}-09-03 | 27 | -09-11 | 10-07 | 10-27 | 11-07 |
SANBORN | 32 | {1974}-09-03 | 25 | {1929}-09-18 | 10-10 | 10-27 | 11-07 |
SIOUX-RAPIDS | 31 | {1974}-09-03 | 28 | {1991}-09-19 | 10-09 | 10-27 | 11-07 |
Spencer | 31 | {1974}-09-03 | 28 | {2007}-09-15 | 10-09 | 10-27 | 11-08 |
Spencer Area | 31 | {1974}-09-03 | 28 | {2007}-09-15 | 10-09 | 10-27 | 11-08 |
Estherville 4E | 32 | {1924}-09-09 | 27 | {1929}-09-18 | 10-07 | 10-27 | 11-06 |
MASON-CITY | 30 | {1915}-08-30 | 28 | {1923}-09-14 | 10-10 | 10-28 | 11-09 |
FAYETTE | 32 | {1949}-09-01 | 27 | {1902}-09-12 | 10-10 | 10-28 | 11-10 |
FOREST-CITY | 31 | {1949}-09-01 | 27 | {1929}-09-18 | 10-13 | 10-28 | 11-09 |
POCAHONTAS | 31 | {1946}-09-02 | 27 | {1929}-09-18 | 10-10 | 10-28 | 11-10 |
SIOUX CENTER 2 SE | 31 | {1974}-09-03 | 24 | {1991}-09-19 | 10-16 | 10-28 | 11-10 |
Iowa - Northwest Climate Division | 32 | {1974}-09-03 | 26 | {1918}-09-20 | 10-12 | 10-28 | 11-08 |
Iowa Drought Region 1 - Northwest | 32 | {1974}-09-03 | 28 | {1991}-09-19 | 10-12 | 10-28 | 11-08 |
LEMARS | 31 | -09-11 | 28 | {1902}-09-12 | 10-12 | 10-28 | 11-08 |
WEBSTER-CITY | 30 | -09-11 | 25 | {1929}-09-18 | 10-12 | 10-28 | 11-10 |
LAKE PARK | 30 | {1940}-09-12 | 28 | {1916}-09-15 | 10-12 | 10-28 | 11-08 |
MASON CITY MUNICIPAL AP | 31 | {2014}-09-13 | 26 | {2011}-09-15 | 10-09 | 10-28 | 11-07 |
SWEA CITY 4 W | 32 | {1974}-09-03 | 26 | {1974}-09-22 | 10-09 | 10-29 | 11-10 |
OELWEIN 1E | 32 | {2011}-09-15 | 28 | {2012}-10-05 | 10-13 | 10-29 | 11-11 |
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 | 10-13 | 10-29 | 11-12 |
Milford | 32 | {1974}-09-03 | 28 | {1929}-09-18 | 10-13 | 10-31 | 11-08 |
Ida Grove Area | 32 | {1974}-09-03 | 27 | {1918}-09-20 | 10-16 | 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 | 10-13 | 10-31 | 11-11 |
MARSHALLTOWN MUNICIPAL AP | 30 | {2007}-09-15 | 27 | {2012}-09-23 | 10-14 | 10-31 | 11-11 |
ROCK VALLEY | 32 | {2007,2011}-09-15 | 28 | {1995}-09-22 | 10-12 | 10-31 | 11-10 |
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 | 10-17 | 11-01 | 11-10 |
ALGONA | 29 | {1893}-09-02 | 27 | {1929}-09-18 | 10-17 | 11-01 | 11-10 |
CARROLL-2-SSW | 28 | {1974}-09-03 | 28 | {1974}-09-03 | 10-16 | 11-01 | 11-10 |
SAC-CITY | 32 | {1974}-09-03 | 28 | {1918}-09-20 | 10-16 | 11-01 | 11-11 |
HAMPTON-2-NW | 32 | -09-11 | 28 | {1955}-09-12 | 10-13 | 11-01 | 11-10 |
Iowa Drought Region 2 - Northcentral | 32 | {1902}-09-12 | 27 | {1913}-09-22 | 10-17 | 11-01 | 11-11 |
AUDUBON | 30 | {1902,1955}-09-12 | 27 | {1896}-09-19 | 10-17 | 11-01 | 11-10 |
Emmetsburg | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-13 | 11-01 | 11-10 |
ROCKWELL-CITY | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-17 | 11-01 | 11-10 |
SPIRIT LAKE | 31 | {1902}-09-12 | 28 | {1929}-09-18 | 10-17 | 11-01 | 11-10 |
LOWDEN | 32 | {2014}-09-13 | 26 | {2012}-09-24 | 10-13 | 11-01 | 11-11 |
Iowa - North Central Climate Division | 32 | {1902}-09-13 | 28 | {1929}-09-18 | 10-12 | 11-01 | 11-10 |
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 |
GUTHRIE-CENTER | 31 | {1893}-09-02 | 28 | {1991}-09-19 | 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 | 10-17 | 11-02 | 11-11 |
Oelwein Area | 20 | {1942}-09-05 | 20 | {1942}-09-05 | 10-16 | 11-02 | 11-11 |
GRINNELL-3-SW | 31 | {1976}-09-10 | 27 | {1991}-09-20 | 10-17 | 11-02 | 11-11 |
MAPLETON NO. 2 | 31 | -09-11 | 27 | {1991}-09-19 | 10-15 | 11-02 | 11-08 |
TOLEDO | 31 | -09-11 | 27 | {1896}-09-20 | 10-17 | 11-02 | 11-11 |
WATERLOO | 32 | -09-11 | 28 | {1929}-09-18 | 10-13 | 11-02 | 11-11 |
Waterloo Area | 32 | -09-11 | 28 | {1929}-09-18 | 10-13 | 11-02 | 11-11 |
Iowa - West Central Climate Division | 31 | {1902}-09-12 | 28 | {1918}-09-20 | 10-17 | 11-02 | 11-11 |
Boone | 32 | {1975}-09-12 | 27 | {1929}-09-18 | 10-17 | 11-02 | 11-11 |
CHARLES-CITY | 32 | {1902,1955}-09-12 | 28 | {1991}-09-20 | 10-16 | 11-02 | 11-11 |
DENISON | 29 | {1902}-09-12 | 21 | {1918}-09-21 | 10-18 | 11-02 | 11-11 |
GRUNDY-CENTER | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-13 | 11-02 | 11-11 |
LOGAN | 30 | {1902}-09-12 | 28 | {1902}-09-13 | 10-17 | 11-02 | 11-11 |
MARSHALLTOWN | 31 | {1955}-09-12 | 28 | {1896}-09-20 | 10-13 | 11-02 | 11-11 |
PERRY | 32 | {1955}-09-12 | 27 | {1929}-09-18 | 10-17 | 11-02 | 11-11 |
STORM-LAKE-2-E | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-17 | 11-02 | 11-10 |
MANCHESTER-2 | 32 | {2014}-09-13 | 27 | {1984}-09-16 | 10-13 | 11-02 | 11-11 |
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 | 28 | {1974}-09-22 | 10-13 | 11-02 | 11-11 |
Ames Area | 31 | {1902}-09-13 | 26 | {1918}-09-21 | 10-17 | 11-02 | 11-11 |
Sioux City Area | 30 | {1902}-09-13 | 25 | {1995}-09-22 | 10-17 | 11-02 | 11-10 |
Iowa Average | 32 | {1902}-09-13 | 24 | {1942}-09-28 | 10-17 | 11-02 | 11-11 |
Iowa - Central Climate Division | 32 | {2007}-09-15 | 28 | {1913}-09-22 | 10-17 | 11-02 | 11-11 |
OAKLAND-2-E | 32 | {1974}-09-03 | 28 | {1995}-09-22 | 10-17 | 11-03 | 11-11 |
BELLE-PLAINE | 31 | -09-11 | 28 | {1916,1929}-09-18 | 10-17 | 11-03 | 11-12 |
CASCADE | 32 | -09-11 | 28 | {1953,1974}-09-22 | 10-10 | 11-03 | 11-11 |
MAQUOKETA-2-W | 31 | -09-11 | 28 | {1983}-09-23 | 10-17 | 11-03 | 11-12 |
RED-OAK | 32 | -09-11 | 28 | {1995}-09-22 | 10-19 | 11-03 | 11-21 |
WILLIAMSBURG | 32 | -09-11 | 28 | {1991}-09-20 | 10-18 | 11-03 | 11-12 |
Iowa Drought Region 4 - Southwest | 32 | {1902}-09-12 | 26 | {1942}-09-28 | 10-19 | 11-03 | 11-13 |
CORNING | 32 | {1902}-09-12 | 27 | {1983}-09-21 | 10-17 | 11-03 | 11-13 |
CLARINDA | 31 | {1902}-09-13 | 28 | {1918}-09-21 | 10-19 | 11-03 | 11-19 |
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 | 10-17 | 11-03 | 11-12 |
AMES-8-WSW | 31 | {1902}-09-13 | 26 | {1918}-09-21 | 10-18 | 11-03 | 11-12 |
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 | 10-17 | 11-03 | 11-12 |
Cedar Rapids Area | 31 | {2007}-09-15 | 28 | {2012}-09-24 | 10-18 | 11-03 | 11-19 |
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 |
MOUNT-AYR | 32 | {1902}-09-13 | 28 | {1991}-09-19 | 10-19 | 11-05 | 11-19 |
Iowa - Southwest Climate Division | 32 | {1902}-09-13 | 26 | {1942}-09-28 | 10-19 | 11-05 | 11-19 |
Cedar Rapids Airport | 31 | {2007}-09-15 | 28 | {2012}-09-24 | 10-17 | 11-05 | 11-12 |
Dubuque Area | 32 | {2007}-09-15 | 28 | {1956}-09-20 | 10-19 | 11-05 | 11-21 |
Iowa - East Central Climate Division | 32 | {1929}-09-18 | 28 | {1926}-09-26 | 10-18 | 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 |
NEWTON | 32 | {1929}-09-18 | 23 | {1942}-09-28 | 10-20 | 11-06 | 11-21 |
WINTERSET | 31 | {1955}-09-12 | 26 | {1896}-09-20 | 10-19 | 11-07 | 11-21 |
OGDEN | 32 | {2007}-09-15 | 26 | {2003}-10-02 | 10-14 | 11-07 | 11-11 |
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 | 10-19 | 11-07 | 11-21 |
IOWA CITY MUNICIPAL AP | 32 | {1991}-09-20 | 26 | {1995}-09-23 | 10-19 | 11-07 | 11-21 |
FAIRFIELD | 32 | -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 |
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 | 11-21 |
WASHINGTON | 30 | {1902}-09-13 | 28 | {1983}-09-23 | 10-19 | 11-08 | 11-21 |
GREENFIELD | 32 | {1981}-09-17 | 27 | {1913}-09-22 | 10-19 | 11-08 | 11-21 |
KNOXVILLE | 31 | {1916}-09-18 | 28 | {1926}-09-26 | 10-24 | 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 | {1991}-09-19 | 25 | {1942}-09-28 | 10-19 | 11-08 | 11-21 |
Iowa - Southeast Climate Division | 32 | {1896}-09-20 | 25 | {1942}-09-28 | 10-24 | 11-08 | 11-22 |
Iowa Drought Region 5 - Southeast | 32 | {1991}-09-20 | 24 | {1942}-09-28 | 10-19 | 11-08 | 11-21 |
Des Moines Airport | 31 | {1995}-09-22 | 26 | {1942}-09-28 | 10-24 | 11-08 | 11-21 |
RATHBUN DAM | 32 | {1974}-09-22 | 28 | {1985}-10-01 | 10-18 | 11-08 | 11-21 |
Des Moines Area | 31 | {1995}-09-22 | 26 | {1942}-09-28 | 10-24 | 11-08 | 11-21 |
KEOSAUQUA | 31 | -09-11 | 28 | {1916}-09-18 | 10-24 | 11-09 | 11-22 |
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 |
CENTERVILLE | 31 | {1913}-09-13 | 28 | {1913}-09-22 | 10-25 | 11-10 | 11-22 |
MOUNT-PLEASANT | 32 | {1902}-09-13 | 28 | {1942}-09-24 | 10-25 | 11-10 | 11-22 |
Burlington Airport | 30 | {1918}-09-18 | 25 | {1942}-09-28 | 10-27 | 11-10 | 11-24 |
Donnellson | 31 | {1991}-09-20 | 25 | {1942}-09-28 | 10-19 | 11-10 | 11-22 |
DUBUQUE-LOCK-AND-DAM | 31 | {1956}-09-20 | 24 | {1899}-09-30 | 10-25 | 11-10 | 11-22 |
MUSCATINE | 29 | {1991}-09-20 | 23 | {1942}-09-28 | 10-24 | 11-10 | 11-21 |
DES MOINES WSFO-JOHNSTON | 31 | {1999}-09-21 | 28 | {2004}-10-02 | 10-21 | 11-10 | 11-12 |
LAMONI | 29 | {2004}-10-02 | 27 | {2012}-10-06 | 10-24 | 11-10 | 11-20 |
Fort Madison | 32 | {1913}-09-22 | 26 | {1942}-09-28 | 10-27 | 11-11 | 11-24 |
BURLINGTON | 32 | {1984}-09-26 | 28 | {1974}-10-02 | 10-27 | 11-11 | 11-27 |
Le Claire L&D 14 | 32 | {1942}-09-26 | 28 | {1942}-09-28 | 10-28 | 11-11 | 11-23 |
MUSCATINE 2N | 27 | {2003}-10-02 | 27 | {2003}-10-02 | 10-17 | 11-11 | 11-22 |
NORTHWOOD | -10 | {1929}-11-29 | -10 | {1929}-11-29 | 11-29 | 11-29 | 11-29 |