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Areas of Hazardous Weather This Weekend

A series of cold fronts from North Pacific storms will bring periods of gusty winds, low elevation rainfall, and high elevation snow to the Pacific Northwest this weekend into next week. Heavy to excessive rainfall may produce areas of flooding over southern Texas this weekend. Read More >

Hazardous Weather Conditions

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

Freeze Warning until November 7, 08:00am
Click here for hazard details and duration
Freeze Warning
  •  
    Freeze Warning until November 7, 08:00am

    NOW until 8:00am Sat

    Freeze Warning

  • Overnight

    Low: 32 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 54. Light northwest wind.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 33. Light and variable wind.

    Low: 33 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 64. West wind 3 to 8 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 40. West wind around 5 mph becoming calm in the evening.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 32. Calm wind.
Saturday
Mostly sunny, with a high near 54. Light northwest wind.
Saturday Night
Clear, with a low around 33. Light and variable wind.
Sunday
Sunny, with a high near 64. West wind 3 to 8 mph.
Sunday Night
Clear, with a low around 40. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 68.
Monday Night
Clear, with a low around 46.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly clear, with a low around 45.
Veterans Day
Mostly sunny, with a high near 66.
Wednesday Night
A 20 percent chance of rain. Partly cloudy, with a low around 43.
Thursday
A 20 percent chance of rain. Mostly sunny, with a high near 56.
Thursday Night
Partly cloudy, with a low around 36.
Friday
Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
O'Fallon IL
 38.59°N 89.92°W (Elev. 551 ft)
Last Update:
1:31 am CST Nov 7, 2026
Forecast Valid:
4am CST Nov 7, 2026-6pm CST Nov 13, 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