Calhoun, IL Weather & Growing Conditions
Tonight
71°F
Partly Cloudy
Partly cloudy, with a low around 71. South southwest wind around 6 mph, with gusts as high as 16 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Partly Cloudy | 6 mph SSW | 7% |
| Sunday | 94°F | Mostly Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 7 to 12 mph NNE | 50% |
| Monday | 82°F | Chance Showers And Thunderstorms | 9 mph NE | 50% |
| Monday Night | 59°F | Chance Showers And Thunderstorms | 7 to 10 mph NE | 48% |
| Tuesday | 75°F | Chance Showers And Thunderstorms | 12 mph NNE | 39% |
| Tuesday Night | 56°F | Mostly Cloudy | 6 to 12 mph NNE | 12% |
| Wednesday | 75°F | Mostly Sunny | 7 to 10 mph N | 10% |
| Wednesday Night | 56°F | Partly Cloudy | 3 to 10 mph N | 3% |
| Thursday | 76°F | Mostly Sunny | 5 to 8 mph N | 1% |
| Thursday Night | 57°F | Partly Cloudy | 2 to 7 mph NNE | 1% |
| Friday | 78°F | Partly Sunny | 3 to 9 mph NNE | 6% |
| Friday Night | 56°F | Partly Cloudy | 3 to 8 mph NNE | 6% |
| Saturday | 81°F | Mostly Sunny | 3 to 7 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Calhoun, IL
Last spring frost
Apr 15
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
6b
Explore more for Calhoun, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Olney 2S, Il (7.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.