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NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

79°F

26°C

Humidity 56%
Wind Speed SE 7 mph
Barometer 29.81 in (1009.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 15 May 6:53 pm CDT
Extended Forecast for

Belleville IL

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Cloudy, then gradually becoming partly cloudy, with a low around 67. South wind around 9 mph, with gusts as high as 23 mph.

    Low: 67 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly between 7am and noon. Mostly cloudy, with a high near 82. West wind 6 to 9 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    High: 82 °F

    T-storms
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy during the evening, then mostly clear overnight, with a low around 66. Southeast wind around 8 mph.

    Low: 66 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 90. South wind 9 to 16 mph, with gusts as high as 26 mph.

    High: 90 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 70. South wind 13 to 15 mph, with gusts as high as 23 mph.

    Low: 70 °F

    Partly Cloudy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.

    High: 82 °F

    Showers
    Likely then
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.

    Low: 61 °F

    Showers
    Likely

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Cloudy, then gradually becoming partly cloudy, with a low around 67. South wind around 9 mph, with gusts as high as 23 mph.
Saturday
Showers and thunderstorms likely, mainly between 7am and noon. Mostly cloudy, with a high near 82. West wind 6 to 9 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy during the evening, then mostly clear overnight, with a low around 66. Southeast wind around 8 mph.
Sunday
Sunny, with a high near 90. South wind 9 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 70. South wind 13 to 15 mph, with gusts as high as 23 mph.
Monday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Tuesday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 72.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 55.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 57.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Belleville IL
 38.55°N 90.01°W (Elev. 548 ft)
Last Update:
5:56 pm CDT May 15, 2026
Forecast Valid:
7pm CDT May 15, 2026-6pm CDT May 22, 2026
 
Forecast Discussion
 
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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