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Guide · 4 min read
When Do Pipes Freeze in Iowa? Freeze Dates for Every Town
Typical first frost, freeze nights and sub-zero nights for every Iowa town we cover, from ten years of Daymet climate data.
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Pipes do not freeze on a calendar date. They freeze on the first night the air in an unheated crawlspace, garage or exterior wall stays below about 20°F for a few hours, and in Iowa that night arrives at a different time in every town. The table below gives the typical first frost, the freeze nights and the sub-zero days for every Iowa town we cover, all 486 of them, from ten years of Daymet climate data.
Iowa at a glance
Oct 11
Earliest typical first frost: Alton
Oct 30
Latest typical first frost: Montrose
162 nights
Most freeze nights a year: Cresco
112 nights
Fewest freeze nights a year: Fort Madison
What the numbers mean for your pipes
Freeze nights count every night the low drops below 32°F. Most of them hurt nothing. The ones that do are the first hard freeze of the season, when a hose is still connected and the crawlspace vents are still open, and the deep cold snap in January when a line along an exterior wall finally loses its margin. Sub-zero days are the second number to watch: below 0°F even an insulated line in an unheated space can freeze. The first frost date is the median of ten years, so about half the years frost earlier and half later.
When a freeze does find a pipe, call to get help from Iowa expert plumbers in 2 minutes. Before it does, how to prevent frozen pipes and the pipe freeze risk checker cover the prep.
Every Iowa town we cover
| Town | Freeze nights/yr | Sub-zero days/yr | Typical first frost | Days over 90°F | July high |
|---|---|---|---|---|---|
| Ackley | 153 | 19 | Oct 13 | 10 | 83°F |
| Adair | 150 | 15 | Oct 13 | 10 | 83°F |
| Adel | 138 | 12 | Oct 15 | 22 | 86°F |
| Afton | 139 | 12 | Oct 17 | 16 | 85°F |
| Agency | 132 | 11 | Oct 17 | 17 | 85°F |
| Ainsworth | 135 | 11 | Oct 17 | 16 | 85°F |
| Akron | 154 | 17 | Oct 12 | 20 | 86°F |
| Albert City | 153 | 19 | Oct 13 | 11 | 83°F |
| Albia | 136 | 11 | Oct 17 | 15 | 85°F |
| Albion | 146 | 16 | Oct 15 | 13 | 84°F |
| Alburnett | 146 | 15 | Oct 15 | 11 | 83°F |
| Alden | 153 | 19 | Oct 13 | 10 | 83°F |
| Algona | 157 | 22 | Oct 13 | 10 | 83°F |
| Alleman | 137 | 13 | Oct 18 | 17 | 85°F |
| Allerton | 134 | 10 | Oct 17 | 16 | 85°F |
| Allison | 152 | 19 | Oct 13 | 9 | 83°F |
| Alta | 156 | 18 | Oct 13 | 9 | 83°F |
| Alton | 154 | 18 | Oct 11 | 15 | 85°F |
| Altoona | 133 | 12 | Oct 19 | 18 | 85°F |
| Ames | 144 | 15 | Oct 15 | 15 | 84°F |
| Anamosa | 143 | 13 | Oct 16 | 10 | 83°F |
| Anita | 148 | 14 | Oct 15 | 15 | 84°F |
| Ankeny | 135 | 12 | Oct 18 | 18 | 85°F |
| Anthon | 154 | 16 | Oct 12 | 19 | 85°F |
| Aplington | 151 | 18 | Oct 13 | 10 | 83°F |
| Arcadia | 151 | 17 | Oct 13 | 11 | 83°F |
| Arlington | 156 | 20 | Oct 13 | 7 | 82°F |
| Armstrong | 159 | 23 | Oct 13 | 9 | 83°F |
| Arnolds Park | 158 | 22 | Oct 11 | 9 | 83°F |
| Asbury | 145 | 15 | Oct 16 | 6 | 82°F |
| Ashton | 158 | 21 | Oct 11 | 12 | 84°F |
| Atkins | 145 | 15 | Oct 16 | 13 | 84°F |
| Atlantic | 145 | 13 | Oct 15 | 17 | 85°F |
| Audubon | 149 | 15 | Oct 15 | 12 | 84°F |
| Aurelia | 156 | 18 | Oct 11 | 11 | 83°F |
| Avoca | 144 | 12 | Oct 15 | 19 | 85°F |
| Badger | 153 | 19 | Oct 13 | 10 | 83°F |
| Bancroft | 158 | 23 | Oct 13 | 9 | 83°F |
| Batavia | 132 | 11 | Oct 17 | 17 | 85°F |
| Battle Creek | 153 | 16 | Oct 12 | 16 | 84°F |
| Baxter | 141 | 14 | Oct 16 | 15 | 84°F |
| Bayard | 146 | 15 | Oct 15 | 16 | 85°F |
| Beacon | 134 | 12 | Oct 17 | 17 | 85°F |
| Bedford | 135 | 10 | Oct 17 | 17 | 85°F |
| Belle Plaine | 146 | 15 | Oct 15 | 14 | 84°F |
| Bellevue | 138 | 13 | Oct 17 | 11 | 84°F |
| Belmond | 156 | 21 | Oct 13 | 9 | 83°F |
| Bettendorf | 125 | 10 | Oct 23 | 14 | 84°F |
| Blairstown | 146 | 15 | Oct 16 | 13 | 84°F |
| Bloomfield | 129 | 10 | Oct 17 | 18 | 85°F |
| Blue Grass | 129 | 10 | Oct 17 | 13 | 84°F |
| Bondurant | 134 | 12 | Oct 18 | 18 | 85°F |
| Boone | 146 | 16 | Oct 13 | 14 | 84°F |
| Boyden | 157 | 20 | Oct 11 | 14 | 84°F |
| Breda | 150 | 17 | Oct 13 | 11 | 83°F |
| Brighton | 134 | 11 | Oct 17 | 17 | 85°F |
| Britt | 158 | 22 | Oct 13 | 8 | 83°F |
| Brooklyn | 144 | 14 | Oct 16 | 13 | 84°F |
| Buffalo | 127 | 10 | Oct 20 | 15 | 84°F |
| Buffalo Center | 159 | 23 | Oct 13 | 8 | 82°F |
| Burlington | 119 | 8 | Oct 23 | 16 | 85°F |
| Burt | 158 | 23 | Oct 13 | 9 | 83°F |
| Calmar | 160 | 22 | Oct 13 | 5 | 81°F |
| Camanche | 127 | 11 | Oct 22 | 12 | 84°F |
| Cambridge | 139 | 13 | Oct 16 | 17 | 85°F |
| Carlisle | 128 | 11 | Oct 19 | 21 | 86°F |
| Carroll | 150 | 16 | Oct 13 | 12 | 84°F |
| Carson | 139 | 11 | Oct 17 | 23 | 86°F |
| Carter Lake | 134 | 9 | Oct 20 | 31 | 87°F |
| Cascade | 144 | 14 | Oct 16 | 9 | 83°F |
| Cedar Falls | 149 | 17 | Oct 13 | 12 | 83°F |
| Cedar Rapids | 141 | 13 | Oct 16 | 15 | 84°F |
| Center Point | 146 | 15 | Oct 13 | 12 | 84°F |
| Centerville | 134 | 11 | Oct 17 | 16 | 85°F |
| Central City | 145 | 15 | Oct 15 | 12 | 84°F |
| Chariton | 138 | 12 | Oct 17 | 17 | 85°F |
| Charles City | 152 | 20 | Oct 13 | 7 | 82°F |
| Charter Oak | 151 | 15 | Oct 13 | 15 | 84°F |
| Cherokee | 155 | 17 | Oct 11 | 15 | 84°F |
| Clarence | 140 | 12 | Oct 15 | 11 | 84°F |
| Clarinda | 136 | 10 | Oct 17 | 22 | 86°F |
| Clarion | 156 | 20 | Oct 13 | 10 | 83°F |
| Clarksville | 150 | 19 | Oct 13 | 10 | 83°F |
| Clear Lake | 158 | 22 | Oct 13 | 8 | 82°F |
| Clermont | 149 | 18 | Oct 13 | 8 | 83°F |
| Clinton | 131 | 11 | Oct 20 | 12 | 84°F |
| Clive | 135 | 12 | Oct 19 | 21 | 86°F |
| Coggon | 148 | 16 | Oct 15 | 9 | 83°F |
| Colfax | 136 | 12 | Oct 17 | 17 | 85°F |
| Collins | 142 | 14 | Oct 16 | 14 | 84°F |
| Colo | 147 | 15 | Oct 16 | 14 | 84°F |
| Columbus Junction | 132 | 11 | Oct 22 | 16 | 85°F |
| Conrad | 150 | 17 | Oct 15 | 11 | 83°F |
| Coon Rapids | 148 | 15 | Oct 15 | 15 | 84°F |
| Coralville | 141 | 12 | Oct 16 | 15 | 84°F |
| Corning | 141 | 12 | Oct 17 | 18 | 85°F |
| Correctionville | 153 | 16 | Oct 12 | 18 | 85°F |
| Corydon | 136 | 11 | Oct 17 | 16 | 85°F |
| Council Bluffs | 133 | 9 | Oct 20 | 31 | 87°F |
| Crescent | 137 | 10 | Oct 20 | 26 | 86°F |
| Cresco | 162 | 24 | Oct 11 | 4 | 81°F |
| Creston | 142 | 12 | Oct 17 | 14 | 85°F |
| Cumming | 135 | 12 | Oct 17 | 20 | 85°F |
| Dakota City | 154 | 20 | Oct 13 | 10 | 83°F |
| Dallas Center | 141 | 13 | Oct 15 | 17 | 85°F |
| Danville | 125 | 9 | Oct 17 | 16 | 85°F |
| Davenport | 124 | 10 | Oct 23 | 15 | 84°F |
| Dayton | 150 | 17 | Oct 13 | 12 | 84°F |
| De Soto | 138 | 13 | Oct 15 | 21 | 86°F |
| Decorah | 152 | 20 | Oct 13 | 7 | 83°F |
| Delhi | 151 | 16 | Oct 13 | 6 | 82°F |
| Delmar | 139 | 13 | Oct 16 | 9 | 83°F |
| Denison | 150 | 15 | Oct 15 | 15 | 84°F |
| Denver | 151 | 19 | Oct 13 | 10 | 83°F |
| Des Moines | 130 | 11 | Oct 19 | 22 | 86°F |
| DeWitt | 132 | 11 | Oct 19 | 13 | 84°F |
| Dexter | 143 | 13 | Oct 15 | 17 | 85°F |
| Dike | 150 | 18 | Oct 13 | 11 | 83°F |
| Donnellson | 121 | 8 | Oct 22 | 18 | 85°F |
| Doon | 156 | 19 | Oct 11 | 16 | 85°F |
| Dow City | 149 | 14 | Oct 15 | 19 | 85°F |
| Dows | 155 | 20 | Oct 13 | 10 | 83°F |
| Dubuque | 141 | 14 | Oct 17 | 8 | 83°F |
| Dumont | 152 | 19 | Oct 13 | 10 | 83°F |
| Dunkerton | 151 | 19 | Oct 13 | 10 | 83°F |
| Dunlap | 147 | 13 | Oct 15 | 22 | 86°F |
| Durant | 130 | 10 | Oct 19 | 15 | 85°F |
| Dyersville | 147 | 16 | Oct 16 | 7 | 82°F |
| Dysart | 150 | 16 | Oct 13 | 10 | 83°F |
| Eagle Grove | 155 | 19 | Oct 13 | 10 | 83°F |
| Earlham | 142 | 13 | Oct 15 | 18 | 85°F |
| Earlville | 149 | 16 | Oct 13 | 6 | 82°F |
| Early | 153 | 18 | Oct 13 | 11 | 84°F |
| Eddyville | 133 | 11 | Oct 17 | 18 | 85°F |
| Edgewood | 155 | 19 | Oct 13 | 5 | 82°F |
| Eldon | 129 | 10 | Oct 17 | 19 | 85°F |
| Eldora | 150 | 18 | Oct 13 | 11 | 83°F |
| Eldridge | 129 | 10 | Oct 19 | 14 | 84°F |
| Elgin | 149 | 18 | Oct 13 | 9 | 83°F |
| Elk Horn | 149 | 14 | Oct 15 | 13 | 84°F |
| Elk Run Heights | 149 | 17 | Oct 13 | 12 | 84°F |
| Elkader | 147 | 17 | Oct 13 | 8 | 83°F |
| Elkhart | 137 | 13 | Oct 18 | 17 | 85°F |
| Ellsworth | 151 | 18 | Oct 13 | 12 | 84°F |
| Elma | 157 | 22 | Oct 13 | 5 | 81°F |
| Ely | 140 | 13 | Oct 16 | 14 | 84°F |
| Emerson | 137 | 10 | Oct 17 | 23 | 86°F |
| Emmetsburg | 156 | 21 | Oct 13 | 10 | 83°F |
| Epworth | 148 | 16 | Oct 16 | 5 | 82°F |
| Essex | 135 | 10 | Oct 17 | 24 | 86°F |
| Estherville | 158 | 22 | Oct 13 | 9 | 83°F |
| Evansdale | 149 | 17 | Oct 13 | 12 | 84°F |
| Everly | 154 | 20 | Oct 12 | 13 | 84°F |
| Exira | 148 | 14 | Oct 15 | 16 | 84°F |
| Fairbank | 153 | 19 | Oct 13 | 10 | 83°F |
| Fairfax | 141 | 13 | Oct 16 | 15 | 85°F |
| Fairfield | 131 | 11 | Oct 17 | 16 | 85°F |
| Farley | 151 | 16 | Oct 13 | 5 | 82°F |
| Farmington | 118 | 8 | Oct 28 | 19 | 85°F |
| Farragut | 133 | 8 | Oct 17 | 26 | 86°F |
| Fayette | 155 | 20 | Oct 13 | 7 | 82°F |
| Fonda | 151 | 19 | Oct 13 | 12 | 84°F |
| Fontanelle | 145 | 13 | Oct 15 | 14 | 84°F |
| Forest City | 160 | 23 | Oct 13 | 8 | 82°F |
| Fort Dodge | 152 | 19 | Oct 13 | 11 | 83°F |
| Fort Madison | 112 | 7 | Oct 30 | 18 | 85°F |
| Fredericksburg | 155 | 21 | Oct 13 | 7 | 82°F |
| Fremont | 137 | 12 | Oct 17 | 16 | 85°F |
| Fruitland | 126 | 10 | Oct 27 | 18 | 85°F |
| Galva | 155 | 18 | Oct 12 | 12 | 84°F |
| Garnavillo | 152 | 19 | Oct 13 | 5 | 82°F |
| Garner | 157 | 22 | Oct 13 | 8 | 82°F |
| Garwin | 147 | 16 | Oct 15 | 12 | 84°F |
| George | 158 | 21 | Oct 11 | 14 | 84°F |
| Gilbert | 147 | 15 | Oct 15 | 14 | 84°F |
| Gilbertville | 149 | 17 | Oct 13 | 12 | 84°F |
| Gilman | 146 | 15 | Oct 16 | 12 | 84°F |
| Gilmore City | 153 | 20 | Oct 13 | 10 | 83°F |
| Gladbrook | 149 | 17 | Oct 15 | 11 | 83°F |
| Glenwood | 134 | 9 | Oct 20 | 28 | 86°F |
| Glidden | 149 | 16 | Oct 13 | 13 | 84°F |
| Goldfield | 155 | 20 | Oct 13 | 10 | 83°F |
| Gowrie | 150 | 17 | Oct 13 | 12 | 84°F |
| Graettinger | 157 | 22 | Oct 13 | 10 | 83°F |
| Grand Junction | 146 | 16 | Oct 15 | 16 | 84°F |
| Grand Mound | 134 | 11 | Oct 17 | 14 | 84°F |
| Grandview | 131 | 11 | Oct 22 | 15 | 85°F |
| Granger | 136 | 12 | Oct 19 | 21 | 85°F |
| Greene | 151 | 19 | Oct 13 | 9 | 83°F |
| Greenfield | 145 | 13 | Oct 15 | 13 | 84°F |
| Grimes | 137 | 12 | Oct 19 | 19 | 85°F |
| Grinnell | 145 | 16 | Oct 16 | 12 | 84°F |
| Griswold | 142 | 12 | Oct 16 | 22 | 85°F |
| Grundy Center | 151 | 17 | Oct 13 | 10 | 83°F |
| Guthrie Center | 146 | 14 | Oct 15 | 16 | 85°F |
| Guttenberg | 143 | 16 | Oct 17 | 8 | 83°F |
| Hamburg | 131 | 8 | Oct 17 | 29 | 86°F |
| Hampton | 155 | 21 | Oct 13 | 10 | 83°F |
| Harlan | 147 | 14 | Oct 15 | 16 | 84°F |
| Hartford | 130 | 11 | Oct 19 | 20 | 85°F |
| Hartley | 156 | 20 | Oct 11 | 11 | 84°F |
| Hawarden | 154 | 18 | Oct 11 | 19 | 85°F |
| Hawkeye | 157 | 21 | Oct 13 | 6 | 82°F |
| Hazleton | 154 | 19 | Oct 13 | 9 | 83°F |
| Hedrick | 135 | 12 | Oct 17 | 16 | 85°F |
| Hiawatha | 145 | 14 | Oct 15 | 12 | 84°F |
| Hills | 135 | 12 | Oct 17 | 18 | 85°F |
| Hinton | 152 | 16 | Oct 12 | 20 | 86°F |
| Holstein | 157 | 18 | Oct 11 | 11 | 83°F |
| Hopkinton | 145 | 15 | Oct 16 | 9 | 83°F |
| Hospers | 156 | 19 | Oct 11 | 14 | 84°F |
| Hubbard | 151 | 17 | Oct 13 | 12 | 84°F |
| Hudson | 149 | 17 | Oct 13 | 12 | 83°F |
| Hull | 157 | 20 | Oct 11 | 14 | 84°F |
| Humboldt | 154 | 20 | Oct 13 | 10 | 83°F |
| Humeston | 136 | 11 | Oct 17 | 17 | 85°F |
| Huxley | 140 | 14 | Oct 17 | 16 | 84°F |
| Ida Grove | 154 | 17 | Oct 12 | 14 | 84°F |
| Independence | 150 | 18 | Oct 13 | 10 | 83°F |
| Indianola | 135 | 12 | Oct 16 | 20 | 86°F |
| Inwood | 158 | 20 | Oct 11 | 15 | 84°F |
| Iowa City | 135 | 11 | Oct 17 | 18 | 85°F |
| Iowa Falls | 153 | 19 | Oct 13 | 10 | 83°F |
| Ireton | 155 | 18 | Oct 11 | 16 | 85°F |
| Janesville | 150 | 18 | Oct 13 | 11 | 83°F |
| Jefferson | 146 | 16 | Oct 15 | 16 | 84°F |
| Jesup | 151 | 18 | Oct 13 | 10 | 83°F |
| Jewell Junction | 150 | 17 | Oct 13 | 12 | 84°F |
| Johnston | 133 | 12 | Oct 19 | 22 | 86°F |
| Kalona | 138 | 12 | Oct 17 | 17 | 85°F |
| Kanawha | 157 | 21 | Oct 13 | 9 | 83°F |
| Kellogg | 142 | 14 | Oct 16 | 14 | 84°F |
| Keokuk | 113 | 6 | Oct 30 | 19 | 85°F |
| Keosauqua | 125 | 9 | Oct 22 | 19 | 86°F |
| Keota | 139 | 12 | Oct 16 | 16 | 85°F |
| Keystone | 148 | 15 | Oct 15 | 12 | 84°F |
| Kingsley | 155 | 17 | Oct 11 | 16 | 85°F |
| Klemme | 157 | 22 | Oct 13 | 8 | 83°F |
| Knoxville | 136 | 12 | Oct 19 | 17 | 85°F |
| La Porte City | 147 | 16 | Oct 13 | 13 | 84°F |
| Lake City | 150 | 17 | Oct 13 | 12 | 84°F |
| Lake Mills | 159 | 24 | Oct 13 | 7 | 82°F |
| Lake Park | 159 | 23 | Oct 11 | 10 | 83°F |
| Lake View | 150 | 17 | Oct 13 | 13 | 84°F |
| Lakeside | 154 | 19 | Oct 13 | 10 | 83°F |
| Lamoni | 129 | 9 | Oct 21 | 18 | 85°F |
| Lamont | 155 | 19 | Oct 13 | 7 | 82°F |
| Lansing | 142 | 17 | Oct 19 | 6 | 83°F |
| Larchwood | 159 | 21 | Oct 11 | 14 | 84°F |
| Latimer | 157 | 21 | Oct 13 | 9 | 83°F |
| Laurens | 153 | 20 | Oct 13 | 11 | 83°F |
| Lawton | 152 | 15 | Oct 12 | 20 | 86°F |
| Le Claire | 126 | 10 | Oct 23 | 14 | 84°F |
| Le Grand | 147 | 15 | Oct 15 | 12 | 84°F |
| Le Mars | 154 | 17 | Oct 12 | 17 | 85°F |
| Lenox | 141 | 11 | Oct 17 | 14 | 84°F |
| Leon | 132 | 10 | Oct 17 | 18 | 85°F |
| Lime Springs | 161 | 23 | Oct 11 | 4 | 81°F |
| Lisbon | 142 | 12 | Oct 16 | 11 | 84°F |
| Little Rock | 160 | 22 | Oct 11 | 12 | 84°F |
| Logan | 142 | 12 | Oct 15 | 25 | 86°F |
| Lone Tree | 136 | 12 | Oct 17 | 16 | 85°F |
| Long Grove | 131 | 11 | Oct 17 | 14 | 84°F |
| Lost Nation | 139 | 12 | Oct 16 | 12 | 84°F |
| Lovilia | 137 | 12 | Oct 16 | 16 | 85°F |
| Lowden | 137 | 12 | Oct 16 | 14 | 84°F |
| Madrid | 140 | 13 | Oct 16 | 17 | 85°F |
| Malvern | 136 | 10 | Oct 20 | 25 | 86°F |
| Manchester | 149 | 17 | Oct 13 | 8 | 83°F |
| Manilla | 150 | 15 | Oct 15 | 14 | 84°F |
| Manly | 157 | 23 | Oct 13 | 6 | 82°F |
| Manning | 151 | 16 | Oct 13 | 13 | 84°F |
| Manson | 151 | 19 | Oct 13 | 11 | 83°F |
| Mapleton | 152 | 15 | Oct 13 | 20 | 85°F |
| Maquoketa | 139 | 13 | Oct 17 | 11 | 84°F |
| Marcus | 157 | 19 | Oct 11 | 12 | 84°F |
| Marengo | 143 | 15 | Oct 16 | 16 | 85°F |
| Marion | 143 | 13 | Oct 15 | 13 | 84°F |
| Marquette | 143 | 17 | Oct 17 | 7 | 83°F |
| Marshalltown | 146 | 15 | Oct 15 | 12 | 84°F |
| Martensdale | 132 | 12 | Oct 16 | 26 | 86°F |
| Mason City | 155 | 21 | Oct 13 | 7 | 82°F |
| Maxwell | 140 | 14 | Oct 16 | 16 | 85°F |
| Maynard | 156 | 21 | Oct 13 | 7 | 82°F |
| McGregor | 147 | 17 | Oct 13 | 6 | 82°F |
| Mechanicsville | 141 | 12 | Oct 16 | 10 | 84°F |
| Mediapolis | 128 | 10 | Oct 17 | 14 | 85°F |
| Melbourne | 145 | 15 | Oct 16 | 14 | 84°F |
| Melcher-Dallas | 137 | 12 | Oct 16 | 18 | 85°F |
| Merrill | 153 | 17 | Oct 12 | 19 | 85°F |
| Miles | 139 | 13 | Oct 17 | 9 | 83°F |
| Milford | 158 | 22 | Oct 11 | 9 | 83°F |
| Milo | 136 | 12 | Oct 16 | 19 | 85°F |
| Minden | 144 | 12 | Oct 16 | 18 | 85°F |
| Missouri Valley | 138 | 11 | Oct 17 | 30 | 86°F |
| Mitchellville | 135 | 12 | Oct 18 | 17 | 85°F |
| Monona | 156 | 20 | Oct 13 | 4 | 82°F |
| Monroe | 136 | 12 | Oct 16 | 16 | 85°F |
| Montezuma | 144 | 14 | Oct 16 | 13 | 84°F |
| Monticello | 143 | 14 | Oct 16 | 10 | 83°F |
| Montrose | 113 | 7 | Oct 30 | 18 | 85°F |
| Moravia | 135 | 11 | Oct 17 | 15 | 85°F |
| Morning Sun | 130 | 10 | Oct 17 | 14 | 85°F |
| Moulton | 132 | 10 | Oct 17 | 16 | 85°F |
| Mount Ayr | 135 | 10 | Oct 17 | 16 | 85°F |
| Mount Pleasant | 129 | 11 | Oct 17 | 16 | 85°F |
| Mount Vernon | 142 | 13 | Oct 16 | 12 | 84°F |
| Moville | 154 | 16 | Oct 12 | 19 | 85°F |
| Murray | 140 | 12 | Oct 17 | 16 | 85°F |
| Muscatine | 131 | 11 | Oct 17 | 14 | 85°F |
| Nashua | 150 | 19 | Oct 13 | 9 | 82°F |
| Neola | 142 | 11 | Oct 16 | 23 | 86°F |
| Nevada | 145 | 15 | Oct 15 | 14 | 84°F |
| New Albin | 138 | 17 | Oct 19 | 7 | 83°F |
| New Hampton | 156 | 22 | Oct 13 | 6 | 82°F |
| New Hartford | 149 | 18 | Oct 13 | 12 | 83°F |
| New London | 128 | 10 | Oct 17 | 16 | 85°F |
| New Sharon | 141 | 13 | Oct 16 | 14 | 85°F |
| New Virginia | 137 | 12 | Oct 17 | 19 | 85°F |
| Newell | 152 | 19 | Oct 13 | 12 | 84°F |
| Newhall | 146 | 15 | Oct 15 | 12 | 84°F |
| Newton | 140 | 14 | Oct 16 | 15 | 84°F |
| Nora Springs | 153 | 21 | Oct 13 | 7 | 82°F |
| North English | 143 | 13 | Oct 16 | 15 | 85°F |
| North Liberty | 140 | 12 | Oct 16 | 16 | 85°F |
| Northwood | 158 | 23 | Oct 13 | 6 | 81°F |
| Norwalk | 133 | 12 | Oct 19 | 21 | 86°F |
| Norway | 145 | 14 | Oct 16 | 13 | 84°F |
| Oakland | 141 | 12 | Oct 16 | 21 | 85°F |
| Ocheyedan | 161 | 23 | Oct 11 | 9 | 83°F |
| Odebolt | 153 | 17 | Oct 13 | 12 | 84°F |
| Oelwein | 155 | 20 | Oct 13 | 8 | 82°F |
| Ogden | 147 | 16 | Oct 15 | 15 | 84°F |
| Okoboji | 159 | 22 | Oct 11 | 9 | 83°F |
| Olin | 140 | 12 | Oct 16 | 13 | 84°F |
| Onawa | 149 | 13 | Oct 13 | 26 | 86°F |
| Orange City | 156 | 19 | Oct 11 | 14 | 84°F |
| Orleans | 158 | 22 | Oct 11 | 9 | 83°F |
| Osage | 157 | 23 | Oct 13 | 6 | 81°F |
| Osceola | 138 | 12 | Oct 17 | 17 | 85°F |
| Oskaloosa | 138 | 12 | Oct 16 | 16 | 85°F |
| Ossian | 159 | 22 | Oct 13 | 5 | 81°F |
| Otho | 152 | 18 | Oct 13 | 11 | 83°F |
| Ottumwa | 130 | 11 | Oct 17 | 19 | 85°F |
| Oxford | 142 | 13 | Oct 16 | 15 | 84°F |
| Oxford Junction | 139 | 12 | Oct 16 | 13 | 84°F |
| Palo | 142 | 14 | Oct 16 | 15 | 84°F |
| Panora | 145 | 14 | Oct 15 | 18 | 85°F |
| Parkersburg | 151 | 18 | Oct 13 | 10 | 83°F |
| Paullina | 155 | 19 | Oct 11 | 13 | 84°F |
| Pella | 137 | 12 | Oct 16 | 15 | 85°F |
| Peosta | 148 | 15 | Oct 16 | 5 | 82°F |
| Perry | 143 | 14 | Oct 15 | 18 | 85°F |
| Pleasant Hill | 131 | 11 | Oct 19 | 20 | 85°F |
| Pleasantville | 134 | 12 | Oct 19 | 18 | 85°F |
| Pocahontas | 152 | 20 | Oct 13 | 11 | 83°F |
| Polk City | 136 | 12 | Oct 19 | 19 | 85°F |
| Pomeroy | 151 | 19 | Oct 13 | 11 | 83°F |
| Postville | 157 | 21 | Oct 13 | 4 | 82°F |
| Prairie City | 134 | 12 | Oct 18 | 17 | 85°F |
| Preston | 137 | 13 | Oct 17 | 11 | 84°F |
| Primghar | 156 | 21 | Oct 11 | 10 | 84°F |
| Princeton | 127 | 10 | Oct 22 | 13 | 84°F |
| Quasqueton | 150 | 17 | Oct 13 | 10 | 83°F |
| Radcliffe | 152 | 18 | Oct 13 | 11 | 83°F |
| Raymond | 150 | 18 | Oct 13 | 11 | 83°F |
| Readlyn | 153 | 20 | Oct 13 | 9 | 83°F |
| Red Oak | 138 | 11 | Oct 16 | 24 | 86°F |
| Redfield | 141 | 13 | Oct 15 | 22 | 86°F |
| Reinbeck | 149 | 17 | Oct 13 | 11 | 83°F |
| Remsen | 154 | 18 | Oct 11 | 15 | 85°F |
| Riceville | 159 | 23 | Oct 13 | 5 | 81°F |
| Richland | 135 | 12 | Oct 17 | 17 | 85°F |
| Riverside | 136 | 12 | Oct 17 | 19 | 85°F |
| Robins | 146 | 14 | Oct 15 | 11 | 84°F |
| Rock Rapids | 158 | 20 | Oct 11 | 15 | 85°F |
| Rock Valley | 155 | 19 | Oct 11 | 17 | 85°F |
| Rockford | 151 | 20 | Oct 13 | 8 | 82°F |
| Rockwell | 154 | 21 | Oct 13 | 8 | 83°F |
| Rockwell City | 150 | 18 | Oct 13 | 11 | 84°F |
| Roland | 148 | 16 | Oct 15 | 13 | 84°F |
| Rolfe | 153 | 20 | Oct 13 | 11 | 83°F |
| Runnells | 131 | 11 | Oct 19 | 19 | 85°F |
| Russell | 138 | 12 | Oct 17 | 16 | 85°F |
| Ruthven | 157 | 21 | Oct 13 | 8 | 83°F |
| Sabula | 134 | 13 | Oct 19 | 12 | 84°F |
| Sac City | 151 | 18 | Oct 13 | 12 | 84°F |
| Sanborn | 158 | 21 | Oct 11 | 10 | 84°F |
| Schaller | 155 | 18 | Oct 13 | 10 | 83°F |
| Schleswig | 154 | 16 | Oct 13 | 12 | 83°F |
| Scranton | 148 | 16 | Oct 15 | 14 | 84°F |
| Sergeant Bluff | 150 | 14 | Oct 12 | 23 | 86°F |
| Seymour | 136 | 11 | Oct 17 | 15 | 85°F |
| Sheffield | 153 | 20 | Oct 13 | 8 | 83°F |
| Shelby | 145 | 12 | Oct 15 | 17 | 84°F |
| Sheldon | 158 | 20 | Oct 11 | 13 | 84°F |
| Shell Rock | 150 | 19 | Oct 13 | 10 | 83°F |
| Shellsburg | 144 | 15 | Oct 15 | 13 | 84°F |
| Shenandoah | 135 | 9 | Oct 17 | 24 | 86°F |
| Shueyville | 142 | 13 | Oct 16 | 13 | 84°F |
| Sibley | 161 | 23 | Oct 11 | 10 | 83°F |
| Sidney | 136 | 9 | Oct 17 | 24 | 86°F |
| Sigourney | 139 | 12 | Oct 16 | 16 | 85°F |
| Sioux Center | 156 | 20 | Oct 11 | 15 | 84°F |
| Sioux City | 151 | 15 | Oct 12 | 22 | 86°F |
| Sioux Rapids | 154 | 19 | Oct 13 | 11 | 84°F |
| Slater | 140 | 14 | Oct 17 | 16 | 85°F |
| Sloan | 150 | 14 | Oct 13 | 24 | 86°F |
| Solon | 139 | 12 | Oct 17 | 15 | 84°F |
| Spencer | 154 | 20 | Oct 13 | 12 | 84°F |
| Spirit Lake | 159 | 22 | Oct 11 | 8 | 83°F |
| Springville | 143 | 13 | Oct 15 | 12 | 84°F |
| St. Ansgar | 157 | 23 | Oct 13 | 5 | 81°F |
| St. Charles | 136 | 12 | Oct 17 | 21 | 86°F |
| Stacyville | 158 | 23 | Oct 13 | 5 | 81°F |
| Stanton | 139 | 11 | Oct 17 | 20 | 85°F |
| Stanwood | 140 | 12 | Oct 16 | 12 | 84°F |
| State Center | 147 | 15 | Oct 16 | 14 | 84°F |
| Storm Lake | 154 | 19 | Oct 13 | 10 | 83°F |
| Story City | 148 | 17 | Oct 15 | 13 | 84°F |
| Stratford | 150 | 17 | Oct 13 | 11 | 84°F |
| Strawberry Point | 156 | 20 | Oct 13 | 6 | 82°F |
| Stuart | 145 | 13 | Oct 15 | 16 | 84°F |
| Sully | 142 | 14 | Oct 16 | 14 | 84°F |
| Sumner | 154 | 20 | Oct 13 | 7 | 82°F |
| Sutherland | 155 | 20 | Oct 11 | 11 | 84°F |
| Swea City | 159 | 23 | Oct 13 | 9 | 83°F |
| Swisher | 141 | 13 | Oct 16 | 14 | 84°F |
| Tabor | 138 | 10 | Oct 17 | 20 | 85°F |
| Tama | 145 | 15 | Oct 15 | 13 | 84°F |
| Thompson | 160 | 23 | Oct 13 | 7 | 82°F |
| Tiffin | 137 | 12 | Oct 17 | 17 | 85°F |
| Tipton | 138 | 11 | Oct 16 | 13 | 84°F |
| Titonka | 158 | 23 | Oct 13 | 8 | 83°F |
| Toledo | 147 | 16 | Oct 15 | 12 | 84°F |
| Traer | 149 | 16 | Oct 15 | 11 | 83°F |
| Treynor | 139 | 11 | Oct 19 | 20 | 85°F |
| Tripoli | 153 | 20 | Oct 13 | 8 | 82°F |
| Truro | 137 | 12 | Oct 17 | 20 | 85°F |
| Underwood | 138 | 11 | Oct 19 | 25 | 86°F |
| University Heights | 138 | 12 | Oct 17 | 16 | 85°F |
| University Park | 137 | 12 | Oct 17 | 17 | 85°F |
| Urbana | 148 | 16 | Oct 13 | 11 | 83°F |
| Urbandale | 136 | 12 | Oct 19 | 19 | 85°F |
| Van Horne | 149 | 15 | Oct 13 | 11 | 83°F |
| Van Meter | 138 | 12 | Oct 15 | 20 | 85°F |
| Ventura | 157 | 22 | Oct 13 | 8 | 82°F |
| Victor | 144 | 15 | Oct 16 | 14 | 84°F |
| Villisca | 138 | 11 | Oct 17 | 22 | 85°F |
| Vinton | 146 | 15 | Oct 15 | 13 | 84°F |
| Walcott | 129 | 11 | Oct 20 | 14 | 84°F |
| Walford | 143 | 14 | Oct 16 | 14 | 84°F |
| Walker | 149 | 16 | Oct 13 | 11 | 83°F |
| Wall Lake | 150 | 17 | Oct 13 | 13 | 84°F |
| Walnut | 146 | 13 | Oct 15 | 16 | 84°F |
| Wapello | 124 | 10 | Oct 27 | 17 | 85°F |
| Washington | 136 | 12 | Oct 17 | 15 | 85°F |
| Waterloo | 149 | 17 | Oct 13 | 12 | 84°F |
| Waukee | 137 | 12 | Oct 16 | 19 | 85°F |
| Waukon | 159 | 22 | Oct 13 | 3 | 81°F |
| Waverly | 149 | 19 | Oct 13 | 11 | 83°F |
| Wayland | 133 | 11 | Oct 17 | 16 | 85°F |
| Webster City | 152 | 18 | Oct 13 | 11 | 83°F |
| Wellman | 140 | 13 | Oct 16 | 16 | 85°F |
| Wellsburg | 152 | 18 | Oct 13 | 11 | 83°F |
| West Bend | 156 | 21 | Oct 13 | 10 | 83°F |
| West Branch | 135 | 11 | Oct 17 | 16 | 85°F |
| West Burlington | 122 | 8 | Oct 17 | 17 | 85°F |
| West Des Moines | 135 | 12 | Oct 19 | 20 | 86°F |
| West Liberty | 133 | 11 | Oct 17 | 17 | 85°F |
| West Point | 124 | 9 | Oct 22 | 17 | 85°F |
| West Union | 158 | 21 | Oct 13 | 6 | 82°F |
| What Cheer | 139 | 13 | Oct 16 | 16 | 85°F |
| Wheatland | 136 | 11 | Oct 17 | 15 | 84°F |
| Whiting | 150 | 14 | Oct 13 | 25 | 86°F |
| Whittemore | 157 | 22 | Oct 13 | 10 | 83°F |
| Williamsburg | 144 | 14 | Oct 16 | 15 | 84°F |
| Wilton | 131 | 10 | Oct 17 | 16 | 85°F |
| Windsor Heights | 134 | 12 | Oct 19 | 20 | 85°F |
| Winfield | 131 | 11 | Oct 17 | 16 | 85°F |
| Winterset | 140 | 13 | Oct 16 | 19 | 85°F |
| Winthrop | 153 | 18 | Oct 13 | 8 | 82°F |
| Woodbine | 145 | 13 | Oct 15 | 22 | 86°F |
| Woodward | 142 | 14 | Oct 15 | 17 | 85°F |
| Wyoming | 142 | 13 | Oct 16 | 10 | 83°F |
| Zearing | 149 | 16 | Oct 15 | 13 | 84°F |
Climate data: Daymet, NASA/ORNL, 2015–2024. Typical values over ten years, not a forecast.
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