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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

73°F

23°C

Humidity 69%
Wind Speed Calm
Barometer 30.06 in (1017.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 15 Jun 7:53 am CDT
Extended Forecast for

O'Fallon IL

  • Today

    Today: Sunny, with a high near 91. Southeast wind 5 to 8 mph.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 69. Southeast wind around 7 mph.

    Low: 69 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 96. Heat index values as high as 103. South wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 96 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75. South wind 6 to 9 mph.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. South wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 94 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.

    High: 88 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 91. Southeast wind 5 to 8 mph.
Tonight
Mostly clear, with a low around 69. Southeast wind around 7 mph.
Sunday
Mostly sunny, with a high near 96. Heat index values as high as 103. South wind 7 to 13 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 75. South wind 6 to 9 mph.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. South wind 7 to 15 mph, with gusts as high as 24 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Tuesday Night
Partly cloudy, with a low around 73.
Juneteenth
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
Wednesday Night
Partly cloudy, with a low around 73.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Thursday Night
Partly cloudy, with a low around 73.
Friday
Sunny, with a high near 95.
Click Map For Forecast
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
O'Fallon IL
 38.59°N 89.92°W (Elev. 551 ft)
Last Update:
5:22 am CDT Jun 15, 2024
Forecast Valid:
8am CDT Jun 15, 2024-6pm CDT Jun 21, 2024
 
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