Brussels, IL Weather Forecast
Local 7-day forecast
Scattered Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Brussels, IL in one place.
Scattered showers and thunderstorms. Partly sunny, with a high near 94. Heat index values as high as 102. East wind around 3 mph. Chance of precipitation is 50%.
Local Weather Overview
This forecast page for Brussels, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 15, 2026 5:11 PM CDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Brussels, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 5:11 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Brussels
Thursday looks like the warmest upcoming period in Brussels at 96 degrees F.
Monday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Saturday at about 6 to 9 mph SW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 5:11 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Isolated showers and thunderstorms before 9pm. Mostly clear, with a low around 75. Heat index values as high as 101. South wind around 5 mph. Chance of precipitation is 20%.
Sunny, with a high near 96. West wind around 6 mph.
Partly cloudy, with a low around 73.
Sunny, with a high near 95.
Mostly clear, with a low around 73.
Mostly sunny, with a high near 95.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a high near 81. Chance of precipitation is 30%.
A slight chance of rain showers. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Scattered Showers And Thunderstorms
|
94°F |
3 mph
E
|
|
Wednesday Night
Sep 16
|
Isolated Showers And Thunderstorms then Mostly Clear
|
75°F |
5 mph
S
|
|
Thursday
Sep 17
|
Sunny
|
96°F |
6 mph
W
|
|
Thursday Night
Sep 17
|
Partly Cloudy
|
73°F |
3 mph
NE
|
|
Friday
Sep 18
|
Sunny
|
95°F |
5 mph
SE
|
|
Friday Night
Sep 18
|
Mostly Clear
|
73°F |
6 mph
S
|
|
Saturday
Sep 19
|
Mostly Sunny
|
95°F |
6 to 9 mph
SW
|
|
Saturday Night
Sep 19
|
Slight Chance Showers And Thunderstorms
|
72°F |
5 mph
SW
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
89°F |
5 to 9 mph
W
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
66°F |
5 to 8 mph
N
|
|
Monday
Sep 21
|
Chance Rain Showers
|
81°F |
6 to 9 mph
NW
|
|
Monday Night
Sep 21
|
Slight Chance Rain Showers
|
63°F |
8 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Brussels.
Nearby forecast pages are not available for this location yet.