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.

Fog/Mist

31°F

-1°C

Humidity 100%
Wind Speed Calm
Barometer 30.24 in (1024.1 mb)
Dewpoint 31°F (-1°C)
Visibility 0.75 mi
Last update 2 Nov 4:53 am CST
Extended Forecast for

2 Miles E O'Fallon IL

Freeze Warning November 2, 05:13am until November 2, 08:00am
Click here for hazard details and duration
...
  •  
    Freeze Warning November 2, 05:13am until November 2, 08:00am

    NOW until 8:00am Sun

    Freeze Warning

  • Today

    High: 55 °F

    Frost and
    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy frost after 3am. Otherwise, clear, with a low around 35. Calm wind becoming south around 6 mph in the evening.

    Low: 35 °F

    Clear then
    Patchy Frost

  • Monday

    Monday: Areas of frost before 7am. Otherwise, sunny, with a high near 64. West wind 5 to 8 mph becoming light and variable in the afternoon.

    High: 64 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39. Calm wind.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69. Light southeast wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 22 mph.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Today
Patchy fog before 8am. Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 55. Calm wind becoming southwest around 5 mph.
Tonight
Patchy frost after 3am. Otherwise, clear, with a low around 35. Calm wind becoming south around 6 mph in the evening.
Monday
Areas of frost before 7am. Otherwise, sunny, with a high near 64. West wind 5 to 8 mph becoming light and variable in the afternoon.
Monday Night
Partly cloudy, with a low around 39. Calm wind.
Tuesday
Mostly sunny, with a high near 69. Light southeast wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 50.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Sunny, with a high near 68.
Thursday Night
A 30 percent chance of rain after midnight. Partly cloudy, with a low around 54.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 46.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E O'Fallon IL
 38.59°N 89.86°W (Elev. 499 ft)
Last Update:
4:51 am CST Nov 2, 2025
Forecast Valid:
5am CST Nov 2, 2025-6pm CST Nov 8, 2025
 
Forecast Discussion
 
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Additional Resources

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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