DeWitt, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for DeWitt, a city in Clinton County, Iowa.
Overnight
61°F
Mostly Clear
Mostly clear. Low around 61, with temperatures rising to around 63 overnight. South wind around 5 mph.
7-day forecast for DeWitt
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 16% |
| Tuesday Night | 66°F | Showers And Thunderstorms Likely | 5 mph N | 76% |
| Wednesday | 77°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph NE | 70% |
| Wednesday Night | 60°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 63% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 0 mph | 35% |
| Thursday Night | 60°F | Mostly Clear | 0 mph | 5% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 64°F | Mostly Clear | 0 mph | 8% |
| Saturday | 85°F | Sunny | 5 mph S | 11% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 mph S | 18% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SW | 18% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 mph SW | 37% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph S | 37% |
Forecast source: National Weather Service (api.weather.gov) for DeWitt (41.823, -90.544). Updated through the day.
Growing snapshot for DeWitt
Last spring frost
Apr 22
First fall frost
Oct 16
Growing season
175 days
Hardiness zone
5b
More local growing data for DeWitt: nearby ZIP 52742 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Andover
Calamus
Camanche
Charlotte
Clinton
Delmar
Goose Lake
Grand Mound
Lost Nation
Low Moor
Toronto
Welton
Wheatland
Climate data from the nearest NOAA station, Clinton #1, Ia (13.5 mi from DeWitt). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.