Charleston, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Charleston, a city in Coles County, Illinois.
Today
85°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 85. South southeast wind 1 to 5 mph.
7-day forecast for Charleston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Patchy Fog then Sunny | 1 to 5 mph SSE | 0% |
| Tonight | 64°F | Mostly Clear | 3 mph SSE | 0% |
| Wednesday | 86°F | Sunny | 5 mph S | 0% |
| Wednesday Night | 67°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 mph S | 36% |
| Thursday | 83°F | Showers And Thunderstorms Likely | 6 mph SSW | 69% |
| Thursday Night | 66°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 36% |
| Friday | 83°F | Slight Chance Showers And Thunderstorms | 5 mph SSW | 23% |
| Friday Night | 66°F | Slight Chance Showers And Thunderstorms | 3 mph SSW | 21% |
| Saturday | 85°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph SSW | 19% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 mph SSW | 16% |
| Sunday | 87°F | Sunny | 6 to 9 mph SSW | 9% |
| Sunday Night | 71°F | Mostly Clear | 8 mph SSW | 9% |
| Monday | 88°F | Mostly Sunny | 9 mph SW | 13% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 8 mph SSW | 25% |
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 Aug 4, 2026.