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.
Overnight
62°F
Mostly Clear
Mostly clear, with a low around 62. South southeast wind around 3 mph.
7-day forecast for De Witt
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Clear | 3 mph SSE | 0% |
| Tuesday | 85°F | Sunny | 6 mph S | 0% |
| Tuesday Night | 65°F | Partly Cloudy | 6 mph SSE | 1% |
| Wednesday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 9 mph SSW | 16% |
| Wednesday Night | 67°F | Chance Showers And Thunderstorms | 7 mph SSE | 80% |
| Thursday | 81°F | Showers And Thunderstorms | 7 mph SSW | 80% |
| Thursday Night | 65°F | Slight Chance Showers And Thunderstorms | 3 to 7 mph S | 24% |
| Friday | 82°F | Partly Sunny | 5 mph SSW | 10% |
| Friday Night | 66°F | Chance Showers And Thunderstorms | 5 mph SSW | 26% |
| Saturday | 84°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 8 mph SSW | 15% |
| Saturday Night | 70°F | Mostly Clear | 7 to 10 mph SSW | 13% |
| Sunday | 87°F | Sunny | 10 to 15 mph SSW | 8% |
| Sunday Night | 71°F | Partly Cloudy | 10 to 14 mph SSW | 11% |
| Monday | 87°F | Slight Chance Showers And Thunderstorms | 10 to 14 mph SSW | 17% |
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 Aug 4, 2026.