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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fog/Mist

60°F

16°C

Humidity 86%
Wind Speed SE 8 mph
Barometer 30.10 in (1019.3 mb)
Dewpoint 56°F (13°C)
Visibility 6.00 mi
Last update 24 Dec 12:53 pm CST
Extended Forecast for

Collinsville IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 66. Southeast wind around 9 mph.

    High: 66 °F

    Mostly Cloudy

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 53. South wind 5 to 8 mph becoming west after midnight.

    Low: 53 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Christmas Day

    Christmas Day: Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 66. Light and variable wind becoming east around 6 mph in the afternoon.

    High: 66 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 59. East wind around 7 mph becoming south after midnight.

    Low: 59 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 71. Southwest wind 5 to 10 mph becoming northwest in the afternoon.

    High: 71 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain and thunderstorms, then rain likely after noon. Cloudy, with a high near 60. Chance of precipitation is 60%.

    High: 60 °F

    Rain Likely

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 66. Southeast wind around 9 mph.
Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 53. South wind 5 to 8 mph becoming west after midnight.
Christmas Day
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 66. Light and variable wind becoming east around 6 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 59. East wind around 7 mph becoming south after midnight.
Friday
Sunny, with a high near 71. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Partly sunny, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 55.
Sunday
A chance of rain and thunderstorms, then rain likely after noon. Cloudy, with a high near 60. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 21. Blustery.
Monday
Mostly sunny, with a high near 29.
Monday Night
Mostly clear, with a low around 19.
Tuesday
Mostly sunny, with a high near 35.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Collinsville IL
 38.66°N 89.97°W (Elev. 548 ft)
Last Update:
1:16 pm CST Dec 24, 2025
Forecast Valid:
1pm CST Dec 24, 2025-6pm CST Dec 30, 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