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.

Mostly Cloudy

68°F

20°C

Humidity 76%
Wind Speed SE 7 mph
Barometer 29.93 in (1013.6 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 25 Dec 3:53 pm CST
Extended Forecast for

2 Miles E O'Fallon IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. Southeast wind 6 to 8 mph becoming south after midnight.

    Low: 58 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 69. Southwest wind 6 to 11 mph becoming northwest in the afternoon.

    High: 69 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 46. Light and variable wind.

    Low: 46 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 67. Light east wind becoming southeast 5 to 10 mph in the morning.

    High: 67 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain after midnight. Cloudy, with a low around 60. South wind 8 to 10 mph.

    Low: 60 °F

    Cloudy then
    Chance Rain

  • Sunday

    Sunday: Rain likely, then showers and possibly a thunderstorm after 9am. High near 71. Chance of precipitation is 80%.

    High: 71 °F

    Showers

  • Sunday Night

    Sunday Night: Rain likely, possibly mixed with snow, mainly before midnight. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 60%.

    Low: 21 °F

    Blustery.
    Rain/Snow
    Likely then
    Slight Chance
    Rain/Snow

  • Monday

    Monday: Mostly sunny, with a high near 28. Blustery.

    High: 28 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 18.

    Low: 18 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 58. Southeast wind 6 to 8 mph becoming south after midnight.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 69. Southwest wind 6 to 11 mph becoming northwest in the afternoon.
Friday Night
Mostly cloudy, with a low around 46. Light and variable wind.
Saturday
Partly sunny, with a high near 67. Light east wind becoming southeast 5 to 10 mph in the morning.
Saturday Night
A 30 percent chance of rain after midnight. Cloudy, with a low around 60. South wind 8 to 10 mph.
Sunday
Rain likely, then showers and possibly a thunderstorm after 9am. High near 71. Chance of precipitation is 80%.
Sunday Night
Rain likely, possibly mixed with snow, mainly before midnight. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 28. Blustery.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Sunny, with a high near 35.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 40.
Wednesday Night
Mostly clear, with a low around 24.
New Year's Day
Sunny, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E O'Fallon IL
 38.59°N 89.86°W (Elev. 499 ft)
Last Update:
3:36 pm CST Dec 25, 2025
Forecast Valid:
4pm CST Dec 25, 2025-6pm CST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation