Coastal Storm Along the East Coast; Pacific Storm System in the West on Friday

A strengthening coastal storm will bring soaking rains to portions of the Mid-Atlantic and Northeast, with accumulating snow likely across the higher elevations of northern New England through Friday. A Pacific storm system will bring heavy low elevation rain, and gusty winds to northern California and the Pacific Northwest, as well as possible blizzard conditions to the Sierra Nevada on Friday. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

O'Fallon IL

  • Tonight

    Tonight: Mostly clear, with a low around 33. Northwest wind 8 to 14 mph, with gusts as high as 23 mph.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 46. North wind 9 to 14 mph.

    High: 46 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 28. North wind 3 to 7 mph.

    Low: 28 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 49. Light north wind.

    High: 49 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 27. Calm wind.

    Low: 27 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 30.

    Low: 30 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 33. Northwest wind 8 to 14 mph, with gusts as high as 23 mph.
Friday
Mostly sunny, with a high near 46. North wind 9 to 14 mph.
Friday Night
Mostly clear, with a low around 28. North wind 3 to 7 mph.
Saturday
Sunny, with a high near 49. Light north wind.
Saturday Night
Clear, with a low around 27. Calm wind.
Sunday
Sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 30.
Monday
Sunny, with a high near 55.
Monday Night
Clear, with a low around 30.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Clear, with a low around 32.
Wednesday
Sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 40.
Thursday
Mostly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
O'Fallon IL
 38.59°N 89.92°W (Elev. 551 ft)
4:51 pm CST Nov 12, 2026
7pm CST Nov 12, 2026-6pm CST Nov 19, 2026
 
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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