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.

A Few Clouds

73°F

23°C

Humidity 100%
Wind Speed Calm
Barometer 29.86 in (1010.8 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 28 Jun 3:53 am CDT
Extended Forecast for

2 Miles SE Belleville IL

Extreme Heat Warning June 28, 12:00pm until July 3, 12:00am
Click here for hazard details and duration
Extreme Heat Warning

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly before 5am. Mostly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 93. Heat index values as high as 110. Light southeast wind becoming south 5 to 9 mph in the morning.

    High: 93 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75. South wind 5 to 8 mph.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95. Heat index values as high as 110. South wind 5 to 10 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 75. South wind 5 to 10 mph becoming light after midnight.

    Low: 75 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 75.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly before 5am. Mostly cloudy, with a low around 72. Calm wind.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 93. Heat index values as high as 110. Light southeast wind becoming south 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 75. South wind 5 to 8 mph.
Monday
Sunny, with a high near 95. Heat index values as high as 110. South wind 5 to 10 mph.
Monday Night
Clear, with a low around 75. South wind 5 to 10 mph becoming light after midnight.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Clear, with a low around 75.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny, with a high near 95.
Thursday Night
Mostly clear, with a low around 76.
Friday
Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 76.
Independence Day
Sunny, with a high near 94.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Belleville IL
 38.5°N 89.98°W (Elev. 495 ft)
Last Update:
2:36 am CDT Jun 28, 2026
Forecast Valid:
4am CDT Jun 28, 2026-6pm CDT Jul 4, 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