Belleville, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Belleville, IL in one place.
A chance of showers and thunderstorms before 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind around 3 mph. Chance of precipitation is 40%.
Local Weather Overview
This forecast page for Belleville, 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: Jul 10, 2026 5:22 AM CDT.
The active forecast window currently covers Jul 10 to Jul 16, 2026 for Belleville, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 10 to Jul 16, 2026
- Latest sync
- Jul 10, 2026 5:22 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Belleville
Wednesday looks like the warmest upcoming period in Belleville at 92 degrees F.
Sunday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Sunday at about 3 to 8 mph NE.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 10, 2026 5:22 AM CDT
- Coverage
- 7 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
A slight chance of showers and thunderstorms between 4pm and 5pm. Partly sunny, with a high near 90. Heat index values as high as 100. Southwest wind around 6 mph. Chance of precipitation is 20%.
Showers and thunderstorms likely between 7pm and 1am, then showers and thunderstorms likely between 1am and 2am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 72. West wind 0 to 3 mph. Chance of precipitation is 70%.
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 9am, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Northwest wind 1 to 5 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Northeast wind 1 to 5 mph. Chance of precipitation is 30%.
A chance of rain showers. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
A chance of rain showers before 7pm. Mostly clear, with a low around 68. Chance of precipitation is 30%.
Sunny, with a high near 88.
Mostly clear, with a low around 69.
Sunny, with a high near 90.
Mostly clear, with a low around 71.
Sunny, with a high near 92.
Mostly clear, with a low around 73.
Sunny, with a high near 92.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 10
|
Chance Showers And Thunderstorms
|
73°F |
3 mph
SW
|
|
Friday
Jul 10
|
Partly Sunny then Slight Chance Showers And Thunderstorms
|
90°F |
6 mph
SW
|
|
Friday Night
Jul 10
|
Showers And Thunderstorms Likely
|
72°F |
0 to 3 mph
W
|
|
Saturday
Jul 11
|
Chance Showers And Thunderstorms
|
86°F |
1 to 5 mph
NW
|
|
Saturday Night
Jul 11
|
Chance Showers And Thunderstorms
|
69°F |
1 to 5 mph
NE
|
|
Sunday
Jul 12
|
Chance Rain Showers
|
86°F |
3 to 8 mph
NE
|
|
Sunday Night
Jul 12
|
Chance Rain Showers then Mostly Clear
|
68°F |
2 to 8 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
88°F |
3 to 8 mph
NE
|
|
Monday Night
Jul 13
|
Mostly Clear
|
69°F |
1 to 7 mph
NE
|
|
Tuesday
Jul 14
|
Sunny
|
90°F |
2 to 7 mph
NE
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
71°F |
0 to 5 mph
E
|
|
Wednesday
Jul 15
|
Sunny
|
92°F |
1 to 5 mph
E
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
73°F |
3 mph
S
|
|
Thursday
Jul 16
|
Sunny
|
92°F |
2 to 6 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Belleville.
