DeWitt, IA Weather & Growing Conditions
This Afternoon
78°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 78, with temperatures falling to around 74 in the afternoon. South wind around 5 mph. Chance of precipitation is 70%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Showers And Thunderstorms Likely | 5 mph S | 71% |
| Tonight | 63°F | Showers And Thunderstorms | 0 to 5 mph NE | 90% |
| Sunday | 67°F | Patchy Fog | 10 mph NE | 68% |
| Sunday Night | 56°F | Chance Rain Showers | 10 mph NE | 39% |
| Monday | 63°F | Rain Showers Likely | 10 mph NE | 64% |
| Monday Night | 52°F | Rain Showers Likely | 5 to 10 mph NE | 66% |
| Tuesday | 62°F | Rain Showers Likely | 10 mph NE | 59% |
| Tuesday Night | 49°F | Mostly Cloudy | 5 to 10 mph NE | 11% |
| Wednesday | 65°F | Partly Sunny | 5 mph NE | 4% |
| Wednesday Night | 51°F | Mostly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 67°F | Partly Sunny | 0 to 5 mph NE | 10% |
| Thursday Night | 55°F | Slight Chance Rain Showers | 0 mph | 16% |
| Friday | 69°F | Partly Sunny | 0 to 5 mph NE | 11% |
| Friday Night | 54°F | Partly Cloudy | 0 mph | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for DeWitt, IA
Last spring frost
Apr 22
First fall frost
Oct 16
Growing season
175 days
Hardiness zone
5b
Explore more for DeWitt, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Clinton #1, Ia (13.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.