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

57°F

14°C

Humidity 45%
Wind Speed SW 5 mph
Barometer 29.79 in (1008.9 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 6 Jan 6:53 pm CST
Extended Forecast for

Scott Air Force Base / Belleville IL

  • Tonight

    Tonight: Mostly clear, with a low around 34. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 34 °F

    Mostly Clear

  • Wednesday

    Wednesday: Patchy fog before 10am. Otherwise, sunny, with a high near 59. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 59 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 44. Southeast wind 7 to 9 mph.

    Low: 44 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Rain. High near 65. South wind 9 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.

    High: 65 °F

    Rain Likely
    then Rain

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 9pm, then rain likely, mainly between 9pm and midnight. Mostly cloudy, with a low around 50. South wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%.

    Low: 50 °F

    Showers
    Likely then
    Chance Rain

  • Friday

    Friday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 34. Northwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
Patchy fog before 10am. Otherwise, sunny, with a high near 59. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 44. Southeast wind 7 to 9 mph.
Thursday
Rain. High near 65. South wind 9 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.
Thursday Night
Showers likely and possibly a thunderstorm before 9pm, then rain likely, mainly between 9pm and midnight. Mostly cloudy, with a low around 50. South wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%.
Friday
Partly sunny, with a high near 57.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 49.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 39.
Sunday Night
Mostly clear, with a low around 26.
Monday
Sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Mostly sunny, with a high near 50.
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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:
5:21 pm CST Jan 6, 2026
Forecast Valid:
7pm CST Jan 6, 2026-6pm CST Jan 13, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation