Charleston, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Charleston, a city in Coles County, Illinois.
Tonight
57°F
Rain
Rain before 3am, then rain showers likely. Mostly cloudy, with a low around 57. South wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Charleston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Rain | 13 to 18 mph S | 93% |
| Wednesday | 63°F | Slight Chance Rain Showers then Mostly Cloudy | 9 to 14 mph SSW | 23% |
| Wednesday Night | 44°F | Mostly Cloudy | 7 mph SW | 0% |
| Thursday | 63°F | Sunny | 7 to 12 mph WSW | 1% |
| Thursday Night | 43°F | Mostly Cloudy | 5 mph WNW | 4% |
| Friday | 57°F | Partly Sunny | 5 to 9 mph NNW | 12% |
| Friday Night | 37°F | Partly Cloudy | 3 to 7 mph NNW | 6% |
| Saturday | 55°F | Mostly Sunny | 5 mph NW | 1% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph WNW | 1% |
| Sunday | 61°F | Sunny | 2 to 8 mph WNW | 9% |
| Sunday Night | 33°F | Mostly Clear | 5 mph WNW | 6% |
| Monday | 63°F | Sunny | 3 to 9 mph WSW | 4% |
| Monday Night | 38°F | Mostly Clear | 6 mph WSW | 1% |
| Tuesday | 67°F | Sunny | 7 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.