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

Heavy Rain and Flooding Possible in the Southwest U.S, Ohio Valley, and Hawaii

Heavy rainfall is expected to continue through Thursday over New Mexico into far west Texas. Flash flooding and debris flows in wildfire burn areas will be possible. Heavy rain and flash flooding is also expected over the southern Appalachians and Ohio Valley. Tropical Depression 15-E, southeast of Hawaii, is expected to bring heavy rain beginning today to the Big Island and Maui. Read More >

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Overcast

66°F

19°C

Humidity 73%
Wind Speed NE 6 mph
Barometer 30.30 in (1025.8 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 23 Sep 10:54 am CDT
Extended Forecast for

2 Miles NNE O'Fallon MO

  • Today

    Today: Partly sunny, with a high near 73. North wind around 7 mph.

    High: 73 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 57. Northeast wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 77. Light northeast wind.

    High: 77 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 77. Light east wind.

    High: 77 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 74.

    High: 74 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 73. North wind around 7 mph.
Tonight
Partly cloudy, with a low around 57. Northeast wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 77. Light northeast wind.
Thursday Night
Mostly cloudy, with a low around 60. Calm wind.
Friday
Partly sunny, with a high near 77. Light east wind.
Friday Night
Mostly cloudy, with a low around 59.
Saturday
Mostly cloudy, with a high near 74.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59.
Sunday
Partly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 84.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 64.
Tuesday
A 50 percent chance of showers. Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE O'Fallon MO
 38.81°N 90.71°W (Elev. 502 ft)
Last Update:
5:31 am CDT Sep 23, 2026
Forecast Valid:
11am CDT Sep 23, 2026-6pm CDT Sep 29, 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