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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Overcast

65°F

18°C

Humidity 54%
Wind Speed SW 6 mph
Barometer 29.87 in (1011.2 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 8 May 11:54 am CDT
Extended Forecast for

O'Fallon MO

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 75. Southwest wind around 9 mph, with gusts as high as 20 mph.

    High: 75 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 10pm, then a slight chance of showers between 10pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 51. Northwest wind 5 to 7 mph becoming light and variable. Chance of precipitation is 70%.

    Low: 51 °F

    Showers
    Likely then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 81. West wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers between 1am and 2am. Increasing clouds, with a low around 55. Light and variable wind becoming north 5 to 7 mph after midnight. Chance of precipitation is 20%.

    Low: 55 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 67. North wind around 8 mph.

    High: 67 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 1pm. Sunny, with a high near 79. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 75. Southwest wind around 9 mph, with gusts as high as 20 mph.
Tonight
Showers and thunderstorms likely before 10pm, then a slight chance of showers between 10pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 51. Northwest wind 5 to 7 mph becoming light and variable. Chance of precipitation is 70%.
Saturday
Sunny, with a high near 81. West wind 6 to 10 mph, with gusts as high as 20 mph.
Saturday Night
A slight chance of showers between 1am and 2am. Increasing clouds, with a low around 55. Light and variable wind becoming north 5 to 7 mph after midnight. Chance of precipitation is 20%.
Sunday
Partly sunny, with a high near 67. North wind around 8 mph.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 72.
Monday Night
Mostly clear, with a low around 49.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Sunny, with a high near 79. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
O'Fallon MO
 38.79°N 90.71°W (Elev. 535 ft)
Last Update:
11:46 am CDT May 8, 2026
Forecast Valid:
12pm CDT May 8, 2026-6pm CDT May 14, 2026
 
Forecast Discussion
 
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