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.

Fair

86°F

30°C

Humidity 43%
Wind Speed Vrbl 7 mph
Barometer 30.21 in (1022.7 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 3 Oct 12:53 pm CDT
Extended Forecast for

3 Miles SE Collinsville IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 90. Southwest wind around 7 mph.

    High: 90 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. South wind around 5 mph.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88. Light south wind increasing to 5 to 10 mph in the morning.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 58. South wind 5 to 8 mph.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 87. South wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

  • Monday

    Monday: A 20 percent chance of showers after 1pm. Sunny, with a high near 88.

    High: 88 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly clear, with a low around 64.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 30%.

    High: 85 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 90. Southwest wind around 7 mph.
Tonight
Mostly clear, with a low around 63. South wind around 5 mph.
Saturday
Sunny, with a high near 88. Light south wind increasing to 5 to 10 mph in the morning.
Saturday Night
Clear, with a low around 58. South wind 5 to 8 mph.
Sunday
Sunny, with a high near 87. South wind 6 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 62.
Monday
A 20 percent chance of showers after 1pm. Sunny, with a high near 88.
Monday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 64.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 58.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Sunny, with a high near 74.
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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:
11:56 am CDT Oct 3, 2025
Forecast Valid:
1pm CDT Oct 3, 2025-6pm CDT Oct 9, 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