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

75°F

24°C

Humidity 94%
Wind Speed Calm
Barometer 30.03 in (1016.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 14 Jul 11:53 pm CDT
Extended Forecast for

Scott Air Force Base / Belleville IL

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 71. Light southeast wind.

    Low: 71 °F

    Patchy Fog

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 60%.

    High: 86 °F

    Slight Chance
    T-storms and
    Patchy Fog
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely before 7pm. Partly cloudy, with a low around 72. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%.

    Low: 72 °F

    Showers
    Likely then
    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 92. Heat index values as high as 102. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 92 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. South wind 3 to 6 mph.

    Low: 74 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89.

    High: 89 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.

    Low: 74 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 71. Light southeast wind.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 60%.
Tuesday Night
Showers likely before 7pm. Partly cloudy, with a low around 72. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 92. Heat index values as high as 102. Calm wind becoming southwest 5 to 7 mph in the morning.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. South wind 3 to 6 mph.
Thursday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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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:
12:22 am CDT Jul 15, 2025
Forecast Valid:
12am CDT Jul 15, 2025-6pm CDT Jul 21, 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