Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

83°F

28°C

Humidity 61%
Wind Speed S 7 mph
Barometer 30.03 in (1016.5 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 18 Jun 6:53 pm CDT
Extended Forecast for

O'Fallon IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 73. South wind 6 to 11 mph becoming light southeast  after midnight.

    Low: 73 °F

    Mostly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 91. South wind 3 to 8 mph.

    High: 91 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72. South wind around 6 mph becoming calm  in the evening.

    Low: 72 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 93. Calm wind becoming south around 6 mph in the afternoon.

    High: 93 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 73. South wind around 5 mph becoming calm  in the evening.

    Low: 73 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, with a low around 73. South wind 6 to 11 mph becoming light southeast after midnight.
Juneteenth
Mostly sunny, with a high near 91. South wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 72. South wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 93. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 96.
Friday Night
Mostly clear, with a low around 75.
Saturday
Mostly sunny and hot, with a high near 98.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 95.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Monday
Sunny, with a high near 93.
Monday Night
Mostly clear, with a low around 73.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 97.
Click Map For Forecast

ABOUT THIS FORECAST

 
Point Forecast:
O'Fallon IL
 38.59°N 89.92°W (Elev. 551 ft)
5:37 pm CDT Jun 18, 2024
7pm CDT Jun 18, 2024-6pm CDT Jun 25, 2024
 
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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