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

22°F

-6°C

Humidity 66%
Wind Speed S 5 mph
Barometer 30.26 in (1025.1 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 24 Feb 1:53 am CST
Extended Forecast for

2 Miles E O'Fallon IL

  • Overnight

    Overnight: Partly cloudy, with a low around 20. South wind 6 to 9 mph.

    Low: 20 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 53. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 53 °F

    Increasing
    Clouds and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. Southwest wind 6 to 11 mph becoming light and variable after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 52. Calm wind becoming north around 5 mph in the afternoon.

    High: 52 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 37. East wind 5 to 8 mph. Chance of precipitation is 60%.

    Low: 37 °F

    Chance Rain
    then Rain
    Likely

  • Thursday

    Thursday: A 20 percent chance of rain before noon. Partly sunny, with a high near 51.

    High: 51 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 20. South wind 6 to 9 mph.
Tuesday
Increasing clouds, with a high near 53. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 34 mph.
Tuesday Night
Mostly cloudy, with a low around 35. Southwest wind 6 to 11 mph becoming light and variable after midnight.
Wednesday
Partly sunny, with a high near 52. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 37. East wind 5 to 8 mph. Chance of precipitation is 60%.
Thursday
A 20 percent chance of rain before noon. Partly sunny, with a high near 51.
Thursday Night
Mostly clear, with a low around 32.
Friday
Sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 40.
Saturday
Sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
A chance of rain and snow. Partly sunny, with a high near 45. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.
Monday
A 40 percent chance of rain. Partly sunny, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E O'Fallon IL
 38.59°N 89.86°W (Elev. 499 ft)
Last Update:
12:26 am CST Feb 24, 2026
Forecast Valid:
3am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation