Harman US

Chestnut, IL Weather & Growing Conditions

Overnight
70°F
Mostly Cloudy
Mostly cloudy, with a low around 70. Southeast wind around 8 mph, with gusts as high as 17 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 70°F Mostly Cloudy 8 mph SE 6%
Saturday 89°F Slight Chance Showers And Thunderstorms 8 mph S 18%
Saturday Night 69°F Mostly Cloudy then Chance Showers And Thunderstorms 3 to 7 mph SSW 28%
Sunday 81°F Chance Showers And Thunderstorms 3 to 14 mph NNW 57%
Sunday Night 60°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 16 mph NE 64%
Monday 68°F Showers And Thunderstorms Likely 17 mph NE 67%
Monday Night 54°F Chance Rain Showers 13 to 16 mph NE 48%
Tuesday 66°F Slight Chance Rain Showers 16 mph NE 21%
Tuesday Night 52°F Mostly Cloudy 8 to 15 mph NNE 12%
Wednesday 69°F Mostly Sunny 13 mph NNE 2%
Wednesday Night 53°F Partly Cloudy 6 to 12 mph NNE 1%
Thursday 71°F Mostly Sunny 7 to 10 mph NNE 2%
Thursday Night 55°F Partly Cloudy 5 to 10 mph NNE 2%
Friday 74°F Mostly Sunny 6 to 10 mph NE 2%

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.