Brussels, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brussels, a village in Calhoun County, Illinois.
This Afternoon
96°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Sunny, with a high near 96. Heat index values as high as 105. East wind around 3 mph. Chance of precipitation is 30%.
7-day forecast for Brussels
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 96°F | Chance Showers And Thunderstorms | 3 mph E | 25% |
| Tonight | 73°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 mph SE | 22% |
| Saturday | 97°F | Mostly Sunny | 5 to 9 mph SW | 6% |
| Saturday Night | 72°F | Partly Cloudy | 5 mph SW | 8% |
| Sunday | 91°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 7 mph W | 34% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 to 9 mph N | 68% |
| Monday | 78°F | Showers And Thunderstorms Likely | 7 to 12 mph NE | 68% |
| Monday Night | 59°F | Showers And Thunderstorms Likely | 8 to 12 mph N | 61% |
| Tuesday | 71°F | Slight Chance Rain Showers then Mostly Cloudy | 12 mph N | 23% |
| Tuesday Night | 54°F | Mostly Cloudy | 6 to 12 mph N | 5% |
| Wednesday | 74°F | Mostly Sunny | 6 to 9 mph N | 0% |
| Wednesday Night | 55°F | Partly Cloudy | 3 to 7 mph N | 1% |
| Thursday | 75°F | Mostly Sunny | 3 to 7 mph N | 4% |
| Thursday Night | 58°F | Partly Cloudy | 6 mph NE | 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 Sep 19, 2026.