Harman US

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.

This Afternoon
84°F
Slight Chance Rain Showers
A slight chance of rain showers after 4pm. Cloudy, with a high near 84. South wind around 7 mph. Chance of precipitation is 20%.

7-day forecast for De Witt

WhenTempForecastWindPrecip
This Afternoon 84°F Slight Chance Rain Showers 7 mph S 19%
Tonight 68°F Mostly Cloudy 6 mph SSW 13%
Sunday 80°F Chance Rain Showers then Chance Showers And Thunderstorms 5 to 14 mph NNE 35%
Sunday Night 59°F Chance Showers And Thunderstorms 10 to 15 mph NE 47%
Monday 68°F Rain Showers Likely 10 to 18 mph ENE 65%
Monday Night 54°F Chance Rain Showers 14 to 18 mph ENE 48%
Tuesday 65°F Chance Rain Showers 17 mph NE 48%
Tuesday Night 52°F Mostly Cloudy 9 to 17 mph NNE 11%
Wednesday 67°F Partly Sunny 10 to 14 mph NNE 6%
Wednesday Night 53°F Partly Cloudy 6 to 14 mph NNE 0%
Thursday 71°F Partly Sunny 7 to 10 mph NNE 1%
Thursday Night 55°F Mostly Cloudy 5 to 10 mph NNE 6%
Friday 74°F Partly Sunny 6 to 10 mph NE 8%
Friday Night 54°F Partly Cloudy 6 to 9 mph NE 8%

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

All Illinois locations ›

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 Sep 19, 2026.