Chester, IL Weather & Growing Conditions
Overnight
56°F
Mostly Cloudy
Mostly cloudy, with a low around 56. Southwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Mostly Cloudy | 7 mph SW | 7% |
| Wednesday | 63°F | Partly Sunny | 6 to 10 mph W | 2% |
| Wednesday Night | 41°F | Mostly Clear | 3 mph SW | 0% |
| Thursday | 68°F | Sunny | 3 to 7 mph W | 0% |
| Thursday Night | 43°F | Partly Cloudy | 3 mph NW | 1% |
| Friday | 59°F | Partly Sunny | 5 to 12 mph N | 1% |
| Friday Night | 35°F | Partly Cloudy | 2 to 7 mph N | 0% |
| Saturday | 56°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 32°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 62°F | Sunny | 1 to 6 mph NW | 1% |
| Sunday Night | 33°F | Clear | 1 mph NW | 0% |
| Monday | 66°F | Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 37°F | Clear | 2 mph SW | 0% |
| Tuesday | 70°F | Sunny | 3 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Chester, IL
Last spring frost
Apr 8
First fall frost
Oct 30
Growing season
202 days
Hardiness zone
7a
Explore more for Chester, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Kaskaskia Rvr Navigation Lock, Il (9.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.