National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Mostly Cloudy

74°F

23°C

Humidity 82%
Wind Speed Calm
Barometer 30.20 in (1022.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 5 Aug 9:53 am CDT
Extended Forecast for

Belleville IL

  • Today

    Today: Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 86. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 86 °F

    Partly Sunny
    then Isolated
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 67. East wind around 5 mph becoming calm in the evening.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69. Light southeast wind.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

Today
Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 86. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 67. East wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 89. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 69. Light southeast wind.
Thursday
Sunny, with a high near 91. Calm wind becoming southeast around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 70.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 72.
Saturday
Sunny, with a high near 93.
Saturday Night
Mostly clear, with a low around 73.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Belleville IL
 38.52°N 90.01°W (Elev. 535 ft)
Last Update:
10:21 am CDT Aug 5, 2025
Forecast Valid:
10am CDT Aug 5, 2025-6pm CDT Aug 11, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation