Caledonia, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Caledonia, a village in Boone County, Illinois.
Tonight
61°F
Slight Chance Rain Showers then Showers And Thunderstorms Likely
A slight chance of rain showers between 11pm and midnight, then showers and thunderstorms likely. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 61. East southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Caledonia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Slight Chance Rain Showers then Showers And Thunderstorms Likely | 10 to 15 mph ESE | 73% |
| Saturday | 75°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 10 to 15 mph ESE | 94% |
| Saturday Night | 61°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph ENE | 76% |
| Sunday | 67°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 66% |
| Sunday Night | 54°F | Chance Rain Showers | 15 mph NE | 44% |
| Monday | 63°F | Chance Rain Showers | 15 to 20 mph ENE | 38% |
| Monday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 38% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Tuesday Night | 48°F | Mostly Cloudy | 5 to 10 mph NE | 10% |
| Wednesday | 64°F | Partly Sunny | 5 to 10 mph NE | 5% |
| Wednesday Night | 49°F | Partly Cloudy | 0 to 10 mph NE | 3% |
| Thursday | 66°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Thursday Night | 50°F | Mostly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 68°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Caledonia (42.369, -88.894). Updated through the day.
Growing snapshot for Caledonia
Last spring frost
May 1
First fall frost
Oct 12
Growing season
162 days
Hardiness zone
5b
More local growing data for Caledonia: nearby ZIP 61011 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Beloit, Wi (10.3 mi from Caledonia). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.