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.

Partly Cloudy

71°F

22°C

Humidity 76%
Wind Speed E 5 mph
Barometer 29.86 in (1010.4 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 21 Jun 6:54 am CDT
Extended Forecast for

2 Miles NNE O'Fallon MO

Flood Watch until June 22, 01:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until June 22, 01:00am

    NOW until 1:00am Mon

    Flood Watch

  • Today

    High: 83 °F

    T-storms

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 3am. Low around 62. Southwest wind 7 to 9 mph becoming northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%.

    Low: 62 °F

    T-storms then
    Chance
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 77. North wind 7 to 9 mph.

    High: 77 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60. North wind around 6 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 81. Calm wind.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 84.

    High: 84 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms. High near 83. Southeast wind 7 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Tonight
Showers and thunderstorms, mainly before 3am. Low around 62. Southwest wind 7 to 9 mph becoming northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%.
Monday
Mostly cloudy, with a high near 77. North wind 7 to 9 mph.
Monday Night
Partly cloudy, with a low around 60. North wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 81. Calm wind.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 84.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 63. Chance of precipitation is 20%.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
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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:
6:56 am CDT Jun 21, 2026
Forecast Valid:
8am CDT Jun 21, 2026-6pm CDT Jun 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation