Caledonia, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Caledonia, a village in Boone County, Illinois.
This Afternoon
67°F
Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 67, with temperatures falling to around 65 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Caledonia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Rain | 15 to 20 mph S | 82% |
| Tonight | 57°F | Rain | 15 mph SSE | 85% |
| Wednesday | 60°F | Chance Rain | 15 mph SSW | 51% |
| Wednesday Night | 46°F | Chance Rain | 15 mph SW | 30% |
| Thursday | 55°F | Rain Likely | 10 to 15 mph WSW | 57% |
| Thursday Night | 40°F | Chance Rain | 5 to 10 mph NW | 34% |
| Friday | 50°F | Slight Chance Rain then Mostly Cloudy | 10 to 15 mph N | 18% |
| Friday Night | 32°F | Partly Cloudy | 0 to 10 mph NNW | 2% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph WNW | 2% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph WSW | 4% |
| Sunday | 57°F | Mostly Sunny then Slight Chance Rain | 5 to 10 mph W | 16% |
| Sunday Night | 34°F | Mostly Clear | 5 to 10 mph W | 5% |
| Monday | 60°F | Sunny | 5 to 15 mph SW | 2% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 1% |
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 Nov 3, 2026.