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

23°F

-5°C

Humidity 53%
Wind Speed NE 8 mph
Barometer 30.37 in (1028.8 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 4 Dec 12:53 pm CST
Extended Forecast for

3 Miles SE Collinsville IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 23. North wind 5 to 7 mph.

    High: 23 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 9. Light and variable wind.

    Low: 9 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 37. Calm wind becoming south 5 to 7 mph in the morning.

    High: 37 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 27. South wind 5 to 7 mph becoming west after midnight.

    Low: 27 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 36. Light and variable wind becoming north around 5 mph in the afternoon.

    High: 36 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: A chance of rain and snow, mainly before noon. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.

    High: 36 °F

    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 23. North wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 9. Light and variable wind.
Friday
Sunny, with a high near 37. Calm wind becoming south 5 to 7 mph in the morning.
Friday Night
Increasing clouds, with a low around 27. South wind 5 to 7 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 36. Light and variable wind becoming north around 5 mph in the afternoon.
Saturday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 28.
Sunday
A chance of rain and snow, mainly before noon. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
Mostly sunny, with a high near 31.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Collinsville IL
 38.66°N 89.97°W (Elev. 548 ft)
Last Update:
1:26 pm CST Dec 4, 2025
Forecast Valid:
1pm CST Dec 4, 2025-6pm CST Dec 10, 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