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.

A Few Clouds

29°F

-2°C

Humidity 61%
Wind Speed NW 18 mph
Barometer 30.41 in (1030.1 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 30 Nov 11:53 am CST
Extended Forecast for

2 Miles NE O'Fallon IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 29. Northwest wind 8 to 16 mph, with gusts as high as 25 mph.

    High: 29 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 20. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 20 °F

    Mostly Cloudy

  • Monday

    Monday: A 40 percent chance of snow, mainly after 4pm. Cloudy, with a high near 32. Northeast wind 3 to 6 mph.

    High: 32 °F

    Cloudy then
    Chance Snow

  • Monday Night

    Monday Night: Snow, mainly before midnight. Low around 21. Calm wind becoming northwest 5 to 7 mph after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 21 °F

    Snow then
    Chance Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 31. Northwest wind around 6 mph becoming light and variable in the afternoon.

    High: 31 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 23.

    High: 23 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 29. Northwest wind 8 to 16 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, with a low around 20. Northwest wind 5 to 7 mph becoming calm in the evening.
Monday
A 40 percent chance of snow, mainly after 4pm. Cloudy, with a high near 32. Northeast wind 3 to 6 mph.
Monday Night
Snow, mainly before midnight. Low around 21. Calm wind becoming northwest 5 to 7 mph after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Partly sunny, with a high near 31. Northwest wind around 6 mph becoming light and variable in the afternoon.
Tuesday Night
Partly cloudy, with a low around 19.
Wednesday
Mostly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 15.
Thursday
Partly sunny, with a high near 23.
Thursday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 13.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 31.
Friday Night
A slight chance of freezing rain. Mostly cloudy, with a low around 24. Chance of precipitation is 20%.
Saturday
Mostly cloudy, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NE O'Fallon IL
 38.61°N 89.89°W (Elev. 499 ft)
Last Update:
11:16 am CST Nov 30, 2025
Forecast Valid:
12pm CST Nov 30, 2025-6pm CST Dec 6, 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