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

63°F

17°C

Humidity 40%
Wind Speed SE 7 mph
Barometer 29.91 in (1013.0 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 7 Jan 3:53 pm CST
Extended Forecast for

Scott Air Force Base / Belleville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 44. Southeast wind 7 to 9 mph.

    Low: 44 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of rain before noon, then showers likely, mainly after 5pm. Cloudy, with a high near 67. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 70%.

    High: 67 °F

    Chance Rain
    then Showers
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 51. South wind 10 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

    Low: 51 °F

    Showers then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 61. Southwest wind 7 to 10 mph becoming north in the afternoon.

    High: 61 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 39. North wind 5 to 8 mph.

    Low: 39 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before noon. Partly sunny, with a high near 46.

    High: 46 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 36.

    High: 36 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 22.

    Low: 22 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 44. Southeast wind 7 to 9 mph.
Thursday
A chance of rain before noon, then showers likely, mainly after 5pm. Cloudy, with a high near 67. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 51. South wind 10 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 61. Southwest wind 7 to 10 mph becoming north in the afternoon.
Friday Night
A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 39. North wind 5 to 8 mph.
Saturday
A 20 percent chance of rain before noon. Partly sunny, with a high near 46.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Sunny, with a high near 36.
Sunday Night
Mostly clear, with a low around 22.
Monday
Sunny, with a high near 48.
Monday Night
Mostly clear, with a low around 31.
Tuesday
Mostly sunny, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 45.
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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:
4:31 pm CST Jan 7, 2026
Forecast Valid:
4pm CST Jan 7, 2026-6pm CST Jan 14, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation