Brussels, IL Weather & Growing Conditions
Overnight
74°F
Mostly Clear
Mostly clear, with a low around 74. Southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 74°F | Mostly Clear | 3 mph SE | 5% |
| Saturday | 97°F | Partly Sunny | 3 to 9 mph SW | 6% |
| Saturday Night | 72°F | Partly Cloudy | 5 mph SW | 4% |
| Sunday | 91°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 7 mph NW | 44% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 to 10 mph NE | 72% |
| Monday | 77°F | Showers And Thunderstorms Likely | 7 to 13 mph NE | 72% |
| Monday Night | 59°F | Chance Showers And Thunderstorms | 7 to 13 mph NE | 27% |
| Tuesday | 70°F | Slight Chance Rain Showers then Mostly Cloudy | 13 mph NE | 21% |
| Tuesday Night | 54°F | Mostly Cloudy | 6 to 13 mph N | 4% |
| Wednesday | 74°F | Mostly Sunny | 7 to 10 mph N | 0% |
| Wednesday Night | 55°F | Partly Cloudy | 2 to 8 mph N | 0% |
| Thursday | 76°F | Mostly Sunny | 3 to 7 mph N | 3% |
| Thursday Night | 57°F | Partly Cloudy | 2 to 7 mph NE | 3% |
| Friday | 78°F | Partly Sunny | 3 to 8 mph NE | 7% |
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 Sep 19, 2026.