Charleston, IL Weather & Growing Conditions
Overnight
60°F
Chance Light Rain
A chance of rain. Cloudy, with a low around 60. South wind around 13 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Chance Light Rain | 13 mph S | 45% |
| Wednesday | 64°F | Chance Light Rain then Slight Chance Drizzle | 10 to 14 mph SW | 32% |
| Wednesday Night | 44°F | Slight Chance Drizzle then Mostly Cloudy | 10 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 | 55°F | Partly Sunny | 6 to 10 mph NNW | 5% |
| Friday Night | 34°F | Partly Cloudy | 5 to 9 mph NNW | 0% |
| Saturday | 54°F | Sunny | 6 mph NNW | 0% |
| Saturday Night | 32°F | Partly Cloudy | 2 mph NW | 1% |
| Sunday | 59°F | Sunny | 2 to 8 mph WNW | 2% |
| Sunday Night | 33°F | Clear | 3 mph W | 0% |
| Monday | 63°F | Sunny | 2 to 7 mph SW | 0% |
| Monday Night | 38°F | Clear | 5 mph SW | 0% |
| Tuesday | 66°F | Sunny | 6 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Charleston, IL
Last spring frost
Apr 15
First fall frost
Oct 23
Growing season
187 days
Hardiness zone
6a
Explore more for Charleston, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Charleston, Il (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.