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 |
Spencer Airport | 32 | {2014}-09-13 | 28 | {2007}-09-15 | 10-04 | 10-24 | 11-10 |
SIBLEY-5-NNE | 30 | {1950}-08-20 | 23 | -09-11 | 10-07 | 10-26 | 11-03 |
CHEROKEE | 31 | {1974}-09-03 | 27 | -09-11 | 10-07 | 10-27 | 11-07 |
ROCK-RAPIDS | 31 | {1974}-09-03 | 26 | {1894}-09-10 | 10-07 | 10-24 | 11-05 |
Estherville 4E | 32 | {1924}-09-09 | 27 | {1929}-09-18 | 10-07 | 10-27 | 11-06 |
LITTLE SIOUX 2NW | 31 | {2007}-09-15 | 27 | {2012}-09-23 | 10-08 | 10-25 | 11-11 |
Elkader 6SSW (Osborn) | 32 | {1893}-08-29 | 0 | {2002}-09-02 | 10-09 | 10-27 | 11-10 |
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 |
SWEA CITY 4 W | 32 | {1974}-09-03 | 26 | {1974}-09-22 | 10-09 | 10-29 | 11-10 |
Spencer Area | 31 | {1974}-09-03 | 28 | {2007}-09-15 | 10-09 | 10-27 | 11-08 |
MASON CITY MUNICIPAL AP | 31 | {2014}-09-13 | 26 | {2011}-09-15 | 10-09 | 10-28 | 11-07 |
MASON-CITY | 30 | {1915}-08-30 | 28 | {1923}-09-14 | 10-10 | 10-28 | 11-09 |
DECORAH-2-N | 32 | {1915}-08-30 | 28 | {1946}-09-02 | 10-10 | 11-01 | 11-11 |
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 |
SANBORN | 32 | {1974}-09-03 | 25 | {1929}-09-18 | 10-10 | 10-27 | 11-07 |
CASCADE | 32 | -09-11 | 28 | {1953,1974}-09-22 | 10-10 | 11-03 | 11-11 |
ESTHERVILLE MUNICIPAL AP | 31 | {2014}-09-13 | 28 | {2007}-09-15 | 10-10 | 10-24 | 11-07 |
STANLEY | 31 | {2014}-09-13 | 26 | {2012}-09-23 | 10-11 | 10-26 | 11-11 |
IOWA-FALLS | 31 | {1915}-08-30 | 28 | {1894}-09-18 | 10-12 | 11-01 | 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 |
WEBSTER-CITY | 30 | -09-11 | 25 | {1929}-09-18 | 10-12 | 10-28 | 11-10 |
LEMARS | 31 | -09-11 | 28 | {1902}-09-12 | 10-12 | 10-28 | 11-08 |
LAKE PARK | 30 | {1940}-09-12 | 28 | {1916}-09-15 | 10-12 | 10-28 | 11-08 |
Iowa - North Central Climate Division | 32 | {1902}-09-13 | 28 | {1929}-09-18 | 10-12 | 11-01 | 11-10 |
ROCK VALLEY | 32 | {2007,2011}-09-15 | 28 | {1995}-09-22 | 10-12 | 10-31 | 11-10 |
SIOUX CITY ANG | 31 | {2012}-09-23 | 20 | {2004}-10-02 | 10-12 | 10-26 | 11-10 |
HOLSTEIN 5 NNW | 30 | {2020}-10-02 | 28 | {2019}-10-12 | 10-12 | 10-25 | 11-10 |
NEW-HAMPTON | 28 | {1949}-09-01 | 28 | {1949}-09-01 | 10-13 | 11-01 | 11-10 |
FOREST-CITY | 31 | {1949}-09-01 | 27 | {1929}-09-18 | 10-13 | 10-28 | 11-09 |
Milford | 32 | {1974}-09-03 | 28 | {1929}-09-18 | 10-13 | 10-31 | 11-08 |
Waterloo Area | 32 | -09-11 | 28 | {1929}-09-18 | 10-13 | 11-02 | 11-11 |
WATERLOO | 32 | -09-11 | 28 | {1929}-09-18 | 10-13 | 11-02 | 11-11 |
HAMPTON-2-NW | 32 | -09-11 | 28 | {1955}-09-12 | 10-13 | 11-01 | 11-10 |
MARSHALLTOWN | 31 | {1955}-09-12 | 28 | {1896}-09-20 | 10-13 | 11-02 | 11-11 |
Emmetsburg | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-13 | 11-01 | 11-10 |
GRUNDY-CENTER | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-13 | 11-02 | 11-11 |
MANCHESTER-2 | 32 | {2014}-09-13 | 27 | {1984}-09-16 | 10-13 | 11-02 | 11-11 |
LOWDEN | 32 | {2014}-09-13 | 26 | {2012}-09-24 | 10-13 | 11-01 | 11-11 |
Iowa - Northeast Climate Division | 32 | {1902}-09-13 | 28 | {1974}-09-22 | 10-13 | 11-02 | 11-11 |
OSAGE | 30 | {1949}-09-14 | 28 | {1929}-09-18 | 10-13 | 11-01 | 11-10 |
AMES MUNICIPAL AP | 31 | {2007}-09-15 | 27 | {2003}-09-30 | 10-13 | 10-31 | 11-11 |
OELWEIN 1E | 32 | {2011}-09-15 | 28 | {2012}-10-05 | 10-13 | 10-29 | 11-11 |
ANAMOSA 3 SSW | 30 | {2012}-09-24 | 26 | {2015}-10-17 | 10-13 | 10-29 | 11-12 |
MARSHALLTOWN MUNICIPAL AP | 30 | {2007}-09-15 | 27 | {2012}-09-23 | 10-14 | 10-31 | 11-11 |
OGDEN | 32 | {2007}-09-15 | 26 | {2003}-10-02 | 10-14 | 11-07 | 11-11 |
MAPLETON NO. 2 | 31 | -09-11 | 27 | {1991}-09-19 | 10-15 | 11-02 | 11-08 |
DAVENPORT WFO | 30 | {2012}-09-23 | 27 | {2012}-10-05 | 10-15 | 10-29 | 11-11 |
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 |
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 | 10-31 | 11-10 |
Oelwein Area | 20 | {1942}-09-05 | 20 | {1942}-09-05 | 10-16 | 11-02 | 11-11 |
PRIMGHAR | 30 | {1902}-09-12 | 25 | {1901}-09-18 | 10-16 | 10-31 | 11-10 |
CHARLES-CITY | 32 | {1902,1955}-09-12 | 28 | {1991}-09-20 | 10-16 | 11-02 | 11-11 |
JEFFERSON | 32 | {1893}-08-29 | 28 | {1929}-09-18 | 10-17 | 11-02 | 11-11 |
BELLEVUE-L-AND-D-12 | 32 | {1986}-08-30 | 28 | {1974,1995}-09-23 | 10-17 | 11-06 | 11-21 |
ALLISON | 32 | {1915}-08-30 | 28 | {1926}-09-25 | 10-17 | 11-02 | 11-11 |
ATLANTIC-1-NE | 30 | {1893}-09-02 | 28 | {1902,1955}-09-12 | 10-17 | 11-01 | 11-10 |
Postville | 32 | {1919}-09-02 | 20 | {1918}-09-21 | 10-17 | 11-02 | 11-11 |
GUTHRIE-CENTER | 31 | {1893}-09-02 | 28 | {1991}-09-19 | 10-17 | 11-02 | 11-11 |
ALGONA | 29 | {1893}-09-02 | 27 | {1929}-09-18 | 10-17 | 11-01 | 11-10 |
FORT-DODGE | 32 | {1974}-09-03 | 27 | {1902}-09-13 | 10-17 | 11-02 | 11-11 |
OAKLAND-2-E | 32 | {1974}-09-03 | 28 | {1995}-09-22 | 10-17 | 11-03 | 11-11 |
GRINNELL-3-SW | 31 | {1976}-09-10 | 27 | {1991}-09-20 | 10-17 | 11-02 | 11-11 |
TOLEDO | 31 | -09-11 | 27 | {1896}-09-20 | 10-17 | 11-02 | 11-11 |
BELLE-PLAINE | 31 | -09-11 | 28 | {1916,1929}-09-18 | 10-17 | 11-03 | 11-12 |
MAQUOKETA-2-W | 31 | -09-11 | 28 | {1983}-09-23 | 10-17 | 11-03 | 11-12 |
Iowa Drought Region 2 - Northcentral | 32 | {1902}-09-12 | 27 | {1913}-09-22 | 10-17 | 11-01 | 11-11 |
Iowa - West Central Climate Division | 31 | {1902}-09-12 | 28 | {1918}-09-20 | 10-17 | 11-02 | 11-11 |
STORM-LAKE-2-E | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-17 | 11-02 | 11-10 |
SPIRIT LAKE | 31 | {1902}-09-12 | 28 | {1929}-09-18 | 10-17 | 11-01 | 11-10 |
ROCKWELL-CITY | 32 | {1902}-09-12 | 28 | {1929}-09-18 | 10-17 | 11-01 | 11-10 |
PERRY | 32 | {1955}-09-12 | 27 | {1929}-09-18 | 10-17 | 11-02 | 11-11 |
LOGAN | 30 | {1902}-09-12 | 28 | {1902}-09-13 | 10-17 | 11-02 | 11-11 |
AUDUBON | 30 | {1902,1955}-09-12 | 27 | {1896}-09-19 | 10-17 | 11-01 | 11-10 |
Boone | 32 | {1975}-09-12 | 27 | {1929}-09-18 | 10-17 | 11-02 | 11-11 |
CHARITON | 32 | {1955}-09-12 | 28 | {1918,1991}-09-20 | 10-17 | 11-05 | 11-21 |
CORNING | 32 | {1902}-09-12 | 27 | {1983}-09-21 | 10-17 | 11-03 | 11-13 |
Iowa Drought Region 3 - Northeast | 32 | {1902}-09-13 | 27 | {1926}-09-26 | 10-17 | 11-03 | 11-12 |
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 |
SIOUX-CITY-WSO-AP | 30 | {1902}-09-13 | 25 | {1995}-09-22 | 10-17 | 11-02 | 11-10 |
VINTON | 32 | {1902,1953}-09-13 | 28 | {1982}-09-21 | 10-17 | 11-03 | 11-12 |
Iowa Average | 32 | {1902}-09-13 | 24 | {1942}-09-28 | 10-17 | 11-02 | 11-11 |
Dubuque Airport | 32 | {2007}-09-15 | 28 | {1956}-09-20 | 10-17 | 11-03 | 11-12 |
Cedar Rapids Airport | 31 | {2007}-09-15 | 28 | {2012}-09-24 | 10-17 | 11-05 | 11-12 |
Iowa - Central Climate Division | 32 | {2007}-09-15 | 28 | {1913}-09-22 | 10-17 | 11-02 | 11-11 |
MUSCATINE 2N | 27 | {2003}-10-02 | 27 | {2003}-10-02 | 10-17 | 11-11 | 11-22 |
WILLIAMSBURG | 32 | -09-11 | 28 | {1991}-09-20 | 10-18 | 11-03 | 11-12 |
DENISON | 29 | {1902}-09-12 | 21 | {1918}-09-21 | 10-18 | 11-02 | 11-11 |
AMES-8-WSW | 31 | {1902}-09-13 | 26 | {1918}-09-21 | 10-18 | 11-03 | 11-12 |
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 |
Iowa - East Central Climate Division | 32 | {1929}-09-18 | 28 | {1926}-09-26 | 10-18 | 11-05 | 11-21 |
RATHBUN DAM | 32 | {1974}-09-22 | 28 | {1985}-10-01 | 10-18 | 11-08 | 11-21 |
RED-OAK | 32 | -09-11 | 28 | {1995}-09-22 | 10-19 | 11-03 | 11-21 |
Iowa Drought Region 4 - Southwest | 32 | {1902}-09-12 | 26 | {1942}-09-28 | 10-19 | 11-03 | 11-13 |
WINTERSET | 31 | {1955}-09-12 | 26 | {1896}-09-20 | 10-19 | 11-07 | 11-21 |
MOUNT-AYR | 32 | {1902}-09-13 | 28 | {1991}-09-19 | 10-19 | 11-05 | 11-19 |
OSKALOOSA | 31 | {1902}-09-13 | 27 | {1991}-09-20 | 10-19 | 11-08 | 11-21 |
WASHINGTON | 30 | {1902}-09-13 | 28 | {1983}-09-23 | 10-19 | 11-08 | 11-21 |
Iowa - Southwest Climate Division | 32 | {1902}-09-13 | 26 | {1942}-09-28 | 10-19 | 11-05 | 11-19 |
CLARINDA | 31 | {1902}-09-13 | 28 | {1918}-09-21 | 10-19 | 11-03 | 11-19 |
SIGOURNEY | 32 | {1902}-09-13 | 25 | {1913}-09-21 | 10-19 | 11-08 | 11-21 |
AMES 5 SE | 32 | {1902}-09-13 | 28 | {1926}-09-26 | 10-19 | 11-04 | 11-20 |
Iowa City | 32 | {1923}-09-14 | 28 | {1916}-09-18 | 10-19 | 11-06 | 11-21 |
Dubuque Area | 32 | {2007}-09-15 | 28 | {1956}-09-20 | 10-19 | 11-05 | 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 |
GREENFIELD | 32 | {1981}-09-17 | 27 | {1913}-09-22 | 10-19 | 11-08 | 11-21 |
GUTTENBERG-L-AND-D-10 | 32 | {1973}-09-18 | 25 | {1942}-09-28 | 10-19 | 11-07 | 11-21 |
BEACONSFIELD | 27 | {1991}-09-19 | 27 | {1991}-09-19 | 10-19 | 11-05 | 11-20 |
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 |
Donnellson | 31 | {1991}-09-20 | 25 | {1942}-09-28 | 10-19 | 11-10 | 11-22 |
IOWA CITY MUNICIPAL AP | 32 | {1991}-09-20 | 26 | {1995}-09-23 | 10-19 | 11-07 | 11-21 |
Iowa Drought Region 5 - Southeast | 32 | {1991}-09-20 | 24 | {1942}-09-28 | 10-19 | 11-08 | 11-21 |
CLINTON-1 | 31 | {1902}-09-13 | 28 | {1928}-09-25 | 10-20 | 11-09 | 11-22 |
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 |
DES MOINES WSFO-JOHNSTON | 31 | {1999}-09-21 | 28 | {2004}-10-02 | 10-21 | 11-10 | 11-12 |
KEOSAUQUA | 31 | -09-11 | 28 | {1916}-09-18 | 10-24 | 11-09 | 11-22 |
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 |
Ottumwa | 32 | {2007}-09-15 | 23 | {1942}-09-28 | 10-24 | 11-09 | 11-22 |
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 |
MUSCATINE | 29 | {1991}-09-20 | 23 | {1942}-09-28 | 10-24 | 11-10 | 11-21 |
Iowa - Southeast Climate Division | 32 | {1896}-09-20 | 25 | {1942}-09-28 | 10-24 | 11-08 | 11-22 |
Des Moines Area | 31 | {1995}-09-22 | 26 | {1942}-09-28 | 10-24 | 11-08 | 11-21 |
Des Moines Airport | 31 | {1995}-09-22 | 26 | {1942}-09-28 | 10-24 | 11-08 | 11-21 |
LAMONI | 29 | {2004}-10-02 | 27 | {2012}-10-06 | 10-24 | 11-10 | 11-20 |
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 |
DUBUQUE-LOCK-AND-DAM | 31 | {1956}-09-20 | 24 | {1899}-09-30 | 10-25 | 11-10 | 11-22 |
Burlington Airport | 30 | {1918}-09-18 | 25 | {1942}-09-28 | 10-27 | 11-10 | 11-24 |
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 |
NORTHWOOD | -10 | {1929}-11-29 | -10 | {1929}-11-29 | 11-29 | 11-29 | 11-29 |