Calhoun, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Calhoun, a village in Richland County, Illinois.
This Afternoon
98°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Sunny, with a high near 98. Heat index values as high as 101. North northeast wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Calhoun
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 98°F | Chance Showers And Thunderstorms | 6 mph NNE | 29% |
| Tonight | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 7 mph E | 24% |
| Saturday | 96°F | Sunny | 5 to 9 mph SW | 12% |
| Saturday Night | 72°F | Partly Cloudy | 7 mph S | 9% |
| Sunday | 95°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 8 mph W | 15% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 8 mph NNE | 33% |
| Monday | 83°F | Chance Rain Showers | 12 mph NE | 49% |
| Monday Night | 60°F | Chance Showers And Thunderstorms | 9 to 14 mph NNE | 49% |
| Tuesday | 74°F | Chance Showers And Thunderstorms | 13 mph NNE | 40% |
| Tuesday Night | 56°F | Mostly Cloudy | 7 to 14 mph NNE | 9% |
| Wednesday | 74°F | Partly Sunny | 10 mph N | 4% |
| Wednesday Night | 56°F | Partly Cloudy | 5 to 10 mph N | 4% |
| Thursday | 76°F | Mostly Sunny | 5 to 9 mph N | 4% |
| Thursday Night | 58°F | Partly Cloudy | 5 to 9 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Calhoun (38.651, -88.044). Updated through the day.
Growing snapshot for Calhoun
Last spring frost
Apr 15
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
6b
More local growing data for Calhoun: nearby ZIP 62452 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Olney 2S, Il (8.4 mi from Calhoun). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.