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

Weather Impacts for the Pacific Northwest This Week; Watching the Northeast U.S.

A series of Pacific fronts will bring periods of moderate rain, higher elevation snow, and gusty winds to the Pacific Northwest through this week. A more widespread precipitation event looks likely this weekend. In the Northeast U.S. a storm may bring gusty winds, low elevation rain, and high elevation snow Friday into this coming weekend. Read More >

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

41°F

5°C

Humidity 96%
Wind Speed Calm
Barometer 30.10 in (1019.1 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 10 Nov 1:54 am CST
Extended Forecast for

O'Fallon MO

  • Overnight

    Overnight: Clear, with a low around 43. West wind around 6 mph.

    Low: 43 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 71. West wind around 5 mph becoming calm in the afternoon.

    High: 71 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 47. Calm wind becoming southwest around 6 mph after midnight.

    Low: 47 °F

    Increasing
    Clouds

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 66. Southwest wind 6 to 11 mph becoming west 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 40. Northwest wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 40 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny

  • Thursday Night

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

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 45.

    High: 45 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 43. West wind around 6 mph.
Tuesday
Sunny, with a high near 71. West wind around 5 mph becoming calm in the afternoon.
Tuesday Night
Increasing clouds, with a low around 47. Calm wind becoming southwest around 6 mph after midnight.
Veterans Day
Mostly sunny, with a high near 66. Southwest wind 6 to 11 mph becoming west 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 40. Northwest wind 9 to 14 mph, with gusts as high as 23 mph.
Thursday
Partly sunny, with a high near 50.
Thursday Night
Mostly clear, with a low around 30.
Friday
Sunny, with a high near 45.
Friday Night
Mostly clear, with a low around 25.
Saturday
Sunny, with a high near 48.
Saturday Night
Mostly clear, with a low around 32.
Sunday
Mostly sunny, with a high near 53.
Sunday Night
A 20 percent chance of rain. Partly cloudy, with a low around 35.
Monday
Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
O'Fallon MO
 38.79°N 90.74°W (Elev. 597 ft)
Last Update:
12:26 am CST Nov 10, 2026
Forecast Valid:
2am CST Nov 10, 2026-6pm CST Nov 16, 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