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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
68°F
Mostly Cloudy
Mostly cloudy, with a low around 68. Southeast wind around 9 mph, with gusts as high as 16 mph.

7-day forecast for De Witt

WhenTempForecastWindPrecip
Overnight 68°F Mostly Cloudy 9 mph SE 4%
Saturday 87°F Slight Chance Showers And Thunderstorms 9 mph S 22%
Saturday Night 68°F Slight Chance Showers And Thunderstorms 8 mph S 28%
Sunday 81°F Showers And Thunderstorms Likely 6 to 16 mph NNE 61%
Sunday Night 59°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 14 to 18 mph NE 62%
Monday 68°F Showers And Thunderstorms Likely 18 mph NE 66%
Monday Night 54°F Showers And Thunderstorms Likely 15 to 20 mph NE 56%
Tuesday 66°F Chance Rain Showers 17 mph NE 33%
Tuesday Night 52°F Mostly Cloudy 9 to 17 mph NNE 8%
Wednesday 69°F Partly Sunny 10 to 14 mph NNE 3%
Wednesday Night 53°F Partly Cloudy 6 to 14 mph NNE 3%
Thursday 70°F Mostly Sunny 7 to 12 mph NNE 3%
Thursday Night 54°F Partly Cloudy 6 to 12 mph NNE 4%
Friday 72°F Mostly Sunny 7 to 12 mph NNE 4%

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

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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.