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

40°F

4°C

Humidity 79%
Wind Speed Calm
Barometer 29.92 in (1013.5 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 26 Feb 8:54 pm CST
Extended Forecast for

2 Miles NW O'Fallon MO

  • Tonight

    Tonight: Clear, with a low around 37. Calm wind becoming southwest around 5 mph after midnight.

    Low: 37 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 71. Southwest wind 6 to 10 mph, with gusts as high as 22 mph.

    High: 71 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39. Southwest wind 5 to 8 mph becoming northeast after midnight.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain. Mostly sunny, with a high near 62. Northeast wind 5 to 10 mph becoming southeast in the afternoon.

    High: 62 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29. North wind around 11 mph, with gusts as high as 21 mph.

    Low: 29 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of rain and snow after noon. Mostly cloudy, with a high near 41. Chance of precipitation is 50%.

    High: 41 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow. Low around 28. Chance of precipitation is 80%.

    Low: 28 °F

    Rain/Snow

  • Monday

    Monday: A slight chance of rain and snow before noon. Mostly cloudy, with a high near 41. Chance of precipitation is 20%.

    High: 41 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday Night

    Monday Night: A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Chance Rain

Detailed Forecast

Tonight
Clear, with a low around 37. Calm wind becoming southwest around 5 mph after midnight.
Friday
Sunny, with a high near 71. Southwest wind 6 to 10 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 39. Southwest wind 5 to 8 mph becoming northeast after midnight.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 62. Northeast wind 5 to 10 mph becoming southeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 29. North wind around 11 mph, with gusts as high as 21 mph.
Sunday
A chance of rain and snow after noon. Mostly cloudy, with a high near 41. Chance of precipitation is 50%.
Sunday Night
Rain and snow. Low around 28. Chance of precipitation is 80%.
Monday
A slight chance of rain and snow before noon. Mostly cloudy, with a high near 41. Chance of precipitation is 20%.
Monday Night
A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 30.
Tuesday
Rain likely, mainly before noon. Cloudy, with a high near 45. Chance of precipitation is 60%.
Tuesday Night
Rain likely. Cloudy, with a low around 37. Chance of precipitation is 60%.
Wednesday
Rain likely. Cloudy, with a high near 55. Chance of precipitation is 60%.
Wednesday Night
Rain likely and possibly a thunderstorm. Cloudy, with a low around 46. Chance of precipitation is 70%.
Thursday
Rain likely. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
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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:
9:36 pm CST Feb 26, 2026
Forecast Valid:
9pm CST Feb 26, 2026-6pm CST Mar 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation