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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

72°F

22°C

Humidity 19%
Wind Speed W 13 G 20 mph
Barometer 29.65 in (1003.8 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 18 Feb 1:53 pm CST
Extended Forecast for

Scott Air Force Base / Belleville IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. Southwest wind 6 to 9 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 50. South wind 3 to 6 mph.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of rain and thunderstorms, mainly before 2pm. Partly sunny, with a high near 70. South wind 6 to 11 mph becoming south 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 70 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 37. Southwest wind 10 to 14 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 52. West wind 8 to 16 mph, with gusts as high as 24 mph.

    High: 52 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of rain and snow after noon. Mostly sunny, with a high near 46. Chance of precipitation is 20%.

    High: 46 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 74. Southwest wind 6 to 9 mph.
Tonight
Partly cloudy, with a low around 50. South wind 3 to 6 mph.
Thursday
A 40 percent chance of rain and thunderstorms, mainly before 2pm. Partly sunny, with a high near 70. South wind 6 to 11 mph becoming south 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.
Thursday Night
Mostly clear, with a low around 37. Southwest wind 10 to 14 mph, with gusts as high as 25 mph.
Friday
Sunny, with a high near 52. West wind 8 to 16 mph, with gusts as high as 24 mph.
Friday Night
Partly cloudy, with a low around 30.
Saturday
A slight chance of rain and snow after noon. Mostly sunny, with a high near 46. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 25.
Sunday
Sunny, with a high near 40.
Sunday Night
Mostly clear, with a low around 20.
Monday
Sunny, with a high near 39.
Monday Night
Mostly clear, with a low around 20.
Tuesday
Mostly sunny, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Scott Air Force Base / Belleville IL
 38.54°N 89.84°W (Elev. 417 ft)
Last Update:
2:41 pm CST Feb 18, 2026
Forecast Valid:
2pm CST Feb 18, 2026-6pm CST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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