Caledonia, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Caledonia, a village in Boone County, Illinois.
Today
75°F
Showers And Thunderstorms
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms between 1pm and 2pm, then showers and thunderstorms. Cloudy, with a high near 75. South southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Caledonia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Showers And Thunderstorms | 5 to 10 mph SSE | 95% |
| Tonight | 60°F | Showers And Thunderstorms | 5 to 10 mph ENE | 93% |
| Sunday | 68°F | Chance Showers And Thunderstorms | 10 to 15 mph NNE | 51% |
| Sunday Night | 54°F | Slight Chance Rain Showers | 15 mph NE | 17% |
| Monday | 62°F | Chance Rain Showers | 15 mph ENE | 31% |
| Monday Night | 49°F | Slight Chance Rain Showers | 10 to 15 mph NE | 17% |
| Tuesday | 61°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 15% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 15 mph NE | 9% |
| Wednesday | 64°F | Mostly Sunny | 10 to 15 mph NE | 3% |
| Wednesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 66°F | Mostly Sunny | 5 to 10 mph NE | 4% |
| Thursday Night | 50°F | Mostly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 70°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Friday Night | 50°F | Partly Cloudy | 0 to 5 mph ENE | 3% |
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.