Charleston, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Charleston, a city in Coles County, Illinois.
Overnight
60°F
Chance Light Rain
A chance of rain. Cloudy, with a low around 60. South wind around 12 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Charleston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Chance Light Rain | 12 mph S | 41% |
| Wednesday | 63°F | Chance Light Rain then Slight Chance Drizzle | 13 mph SW | 31% |
| Wednesday Night | 43°F | Slight Chance Drizzle then Mostly Cloudy | 9 mph WSW | 10% |
| Thursday | 62°F | Partly Sunny | 9 to 14 mph WSW | 3% |
| Thursday Night | 43°F | Mostly Cloudy | 5 mph WNW | 1% |
| Friday | 54°F | Partly Sunny | 6 to 10 mph NNW | 5% |
| Friday Night | 34°F | Partly Cloudy | 3 to 8 mph NNW | 0% |
| Saturday | 54°F | Sunny | 6 mph NNW | 0% |
| Saturday Night | 32°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 59°F | Sunny | 2 to 8 mph WNW | 2% |
| Sunday Night | 33°F | Clear | 3 mph W | 0% |
| Monday | 62°F | Sunny | 1 to 7 mph SW | 0% |
| Monday Night | 38°F | Clear | 3 mph SW | 0% |
| Tuesday | 66°F | Sunny | 6 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Charleston (39.484, -88.178). Updated through the day.
Growing snapshot for Charleston
Last spring frost
Apr 15
First fall frost
Oct 23
Growing season
187 days
Hardiness zone
6a
More local growing data for Charleston: nearby ZIP 61920 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Charleston, Il (2.5 mi from Charleston). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.