Harman US

Chestnut, IL Weather & Growing Conditions

Tonight
70°F
Partly Cloudy
Partly cloudy, with a low around 70. Southeast wind around 10 mph, with gusts as high as 18 mph.

7-day forecast

WhenTempForecastWindPrecip
Tonight 70°F Partly Cloudy 10 mph SE 5%
Saturday 90°F Slight Chance Showers And Thunderstorms then Partly Sunny 8 mph SSW 17%
Saturday Night 69°F Mostly Cloudy then Chance Showers And Thunderstorms 7 mph SSW 26%
Sunday 84°F Showers And Thunderstorms Likely 3 to 13 mph N 60%
Sunday Night 61°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 12 to 15 mph NE 65%
Monday 70°F Showers And Thunderstorms Likely 16 mph NE 65%
Monday Night 55°F Chance Showers And Thunderstorms 13 to 17 mph NE 52%
Tuesday 67°F Chance Rain Showers 15 mph NE 33%
Tuesday Night 52°F Mostly Cloudy 7 to 15 mph NNE 6%
Wednesday 70°F Partly Sunny 12 mph NNE 2%
Wednesday Night 54°F Partly Cloudy 5 to 12 mph NNE 2%
Thursday 71°F Mostly Sunny 6 to 9 mph NNE 3%
Thursday Night 55°F Partly Cloudy 5 to 8 mph NNE 4%
Friday 73°F Mostly Sunny 6 to 10 mph NNE 4%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Chestnut, IL

Last spring frost
Apr 20
First fall frost
Oct 16
Growing season
179 days
Hardiness zone
6a

Explore more for Chestnut, IL: full frost dates · planting calendar · Illinois frost dates

Climate data from the nearest NOAA station, Lincoln, Il (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.