Chestnut, IL Weather & Growing Conditions
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. South wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 6 mph S | 0% |
| Tonight | 67°F | Mostly Clear | 6 mph SSE | 0% |
| Wednesday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 8 mph S | 19% |
| Wednesday Night | 68°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 7 mph SE | 80% |
| Thursday | 82°F | Showers And Thunderstorms | 5 to 8 mph SSW | 80% |
| Thursday Night | 66°F | Slight Chance Showers And Thunderstorms | 2 to 7 mph SSE | 20% |
| Friday | 83°F | Mostly Sunny | 5 mph SSW | 8% |
| Friday Night | 67°F | Chance Showers And Thunderstorms | 3 mph S | 26% |
| Saturday | 86°F | Mostly Sunny | 3 to 8 mph SSW | 14% |
| Saturday Night | 70°F | Mostly Clear | 8 mph S | 11% |
| Sunday | 88°F | Sunny | 8 to 14 mph SSW | 6% |
| Sunday Night | 73°F | Partly Cloudy | 9 to 13 mph SSW | 12% |
| Monday | 88°F | Mostly Sunny | 9 to 13 mph SSW | 14% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms | 12 mph SSW | 26% |
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 Aug 4, 2026.