DeWitt, IA Weather & Growing Conditions
Tonight
52°F
Rain Showers Likely
Rain showers likely before 4am. Mostly cloudy. Low around 52, with temperatures rising to around 54 overnight. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Rain Showers Likely | 10 to 15 mph S | 73% |
| Wednesday | 55°F | Chance Rain Showers | 15 mph SW | 31% |
| Wednesday Night | 45°F | Slight Chance Rain Showers | 10 to 15 mph SW | 20% |
| Thursday | 54°F | Chance Rain Showers | 5 to 10 mph W | 52% |
| Thursday Night | 42°F | Chance Rain Showers then Mostly Cloudy | 5 mph NW | 25% |
| Friday | 52°F | Partly Sunny | 5 to 10 mph N | 10% |
| Friday Night | 34°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 3% |
| Sunday | 59°F | Sunny | 5 mph W | 12% |
| Sunday Night | 36°F | Mostly Clear | 0 to 5 mph W | 3% |
| Monday | 62°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 62°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.