De Witt, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for De Witt, a village in De Witt County, Illinois.
Tonight
54°F
Light Rain
Rain before 2am, then rain showers likely. Cloudy. Low around 54, with temperatures rising to around 59 overnight. South wind 16 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for De Witt
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Light Rain | 16 to 20 mph S | 95% |
| Wednesday | 61°F | Slight Chance Rain Showers then Mostly Cloudy | 15 to 18 mph SW | 22% |
| Wednesday Night | 44°F | Mostly Cloudy | 14 mph SW | 2% |
| Thursday | 61°F | Mostly Sunny | 13 to 18 mph WSW | 5% |
| Thursday Night | 42°F | Mostly Cloudy | 6 to 10 mph WNW | 14% |
| Friday | 55°F | Slight Chance Light Rain then Mostly Cloudy | 8 to 14 mph NNW | 17% |
| Friday Night | 35°F | Mostly Cloudy | 5 to 13 mph NNW | 6% |
| Saturday | 54°F | Mostly Sunny | 7 mph NW | 2% |
| Saturday Night | 33°F | Partly Cloudy | 5 mph W | 2% |
| Sunday | 60°F | Sunny | 5 to 13 mph W | 11% |
| Sunday Night | 34°F | Mostly Clear | 6 to 10 mph WNW | 7% |
| Monday | 64°F | Sunny | 6 to 14 mph WSW | 2% |
| Monday Night | 38°F | Mostly Clear | 7 to 10 mph WSW | 2% |
| Tuesday | 67°F | Sunny | 9 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for De Witt (40.185, -88.785). Updated through the day.
Growing snapshot for De Witt
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
6a
More local growing data for De Witt: nearby ZIP 61735 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Bloomington 5W, Il (24.4 mi from De Witt). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.