Brussels, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brussels, a village in Calhoun County, Illinois.
This Afternoon
74°F
Light Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 74, with temperatures falling to around 67 in the afternoon. South wind 18 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 100%.
7-day forecast for Brussels
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Light Rain | 18 to 22 mph S | 99% |
| Tonight | 52°F | Light Rain | 9 to 16 mph SW | 78% |
| Wednesday | 63°F | Chance Rain Showers then Mostly Cloudy | 10 to 16 mph W | 10% |
| Wednesday Night | 45°F | Partly Cloudy | 8 mph SW | 0% |
| Thursday | 68°F | Sunny | 7 to 13 mph SW | 5% |
| Thursday Night | 45°F | Slight Chance Light Rain then Mostly Cloudy | 6 mph NW | 24% |
| Friday | 61°F | Partly Sunny | 6 to 10 mph NW | 6% |
| Friday Night | 41°F | Partly Cloudy | 2 to 7 mph N | 1% |
| Saturday | 60°F | Partly Sunny | 5 mph NW | 0% |
| Saturday Night | 39°F | Partly Cloudy | 3 mph NW | 1% |
| Sunday | 61°F | Mostly Sunny | 3 to 10 mph W | 8% |
| Sunday Night | 38°F | Mostly Clear | 6 mph W | 4% |
| Monday | 64°F | Sunny | 3 to 8 mph SW | 3% |
| Monday Night | 40°F | Mostly Clear | 3 mph SW | 3% |
Forecast source: National Weather Service (api.weather.gov) for Brussels (38.948, -90.589). Updated through the day.
Growing snapshot for Brussels
Last spring frost
Apr 5
First fall frost
Oct 27
Growing season
203 days
Hardiness zone
6b
More local growing data for Brussels: nearby ZIP 62013 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, St Charles Co Ap, Mo (8.1 mi from Brussels). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.