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

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

77°F

25°C

Humidity 45%
Wind Speed S 10 mph
Barometer 29.73 in (1006.0 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 21 Mar 10:54 pm CDT
Extended Forecast for

2 Miles NW O'Fallon MO

  • Tonight

    Tonight: Clear, with a low around 65. Southwest wind around 8 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 87. Southwest wind 6 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.

    High: 87 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 10 to 18 mph, with gusts as high as 32 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 57. Northeast wind 7 to 9 mph.

    High: 57 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41. East wind around 6 mph.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain and thunderstorms. Partly cloudy, with a low around 56. Chance of precipitation is 20%.

    Low: 56 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Clear, with a low around 65. Southwest wind around 8 mph, with gusts as high as 20 mph.
Sunday
Increasing clouds, with a high near 87. Southwest wind 6 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 10 to 18 mph, with gusts as high as 32 mph.
Monday
Mostly sunny, with a high near 57. Northeast wind 7 to 9 mph.
Monday Night
Mostly cloudy, with a low around 41. East wind around 6 mph.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 47.
Wednesday
Partly sunny, with a high near 75.
Wednesday Night
A slight chance of rain and thunderstorms. Partly cloudy, with a low around 56. Chance of precipitation is 20%.
Thursday
A 20 percent chance of rain and thunderstorms after 1pm. Sunny, with a high near 84.
Thursday Night
A 40 percent chance of rain and thunderstorms. Partly cloudy, with a low around 45.
Friday
A 40 percent chance of rain. Partly sunny, with a high near 57.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 38.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW O'Fallon MO
 38.81°N 90.74°W (Elev. 499 ft)
Last Update:
9:51 pm CDT Mar 21, 2026
Forecast Valid:
11pm CDT Mar 21, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation