Brussels, IL Weather & Growing Conditions
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 around 20 mph, with gusts as high as 29 mph. Chance of precipitation is 90%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Light Rain | 20 mph S | 94% |
| Tonight | 53°F | Light Rain | 9 to 16 mph SW | 79% |
| Wednesday | 63°F | Chance Rain Showers then Mostly Cloudy | 10 to 16 mph W | 10% |
| Wednesday Night | 43°F | Partly Cloudy | 5 to 8 mph SW | 0% |
| Thursday | 65°F | Sunny | 6 to 13 mph W | 4% |
| Thursday Night | 43°F | Mostly Cloudy | 3 to 7 mph NW | 14% |
| Friday | 58°F | Partly Sunny | 7 to 10 mph NW | 5% |
| Friday Night | 38°F | Mostly Cloudy | 1 to 7 mph N | 1% |
| Saturday | 57°F | Mostly Sunny | 1 to 5 mph NW | 0% |
| Saturday Night | 37°F | Partly Cloudy | 2 mph W | 2% |
| Sunday | 63°F | Sunny | 2 to 8 mph W | 8% |
| Sunday Night | 37°F | Mostly Clear | 5 mph W | 3% |
| Monday | 67°F | Sunny | 3 to 8 mph SW | 2% |
| Monday Night | 41°F | Mostly Clear | 5 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Brussels, IL
Last spring frost
Apr 5
First fall frost
Oct 27
Growing season
203 days
Hardiness zone
6b
Explore more for Brussels, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, St Charles Co Ap, Mo (8.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.