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.

Overcast

73°F

23°C

Humidity 87%
Wind Speed Calm
Barometer 29.98 in (1015.0 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 16 Jun 10:53 am CDT
Extended Forecast for

Belleville IL

  • Today

    Today: A 50 percent chance of showers and thunderstorms, mainly before 5pm. Mostly cloudy, with a high near 82. Southeast wind 3 to 5 mph.

    High: 82 °F

    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 73. South wind around 7 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 87. Southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 87 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly before 5pm. Mostly cloudy, with a high near 82. Southeast wind 3 to 5 mph.
Tonight
A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 89. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 73. South wind around 7 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 87. Southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 69.
Juneteenth
Sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 75.
Saturday
Sunny, with a high near 95.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Belleville IL
 38.53°N 90.04°W (Elev. 554 ft)
Last Update:
7:52 am CDT Jun 16, 2025
Forecast Valid:
11am CDT Jun 16, 2025-6pm CDT Jun 22, 2025
 
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