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.

Overcast

69°F

21°C

Humidity 87%
Wind Speed NW 5 mph
Barometer 29.64 in (1003.3 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 14 May 6:53 pm CDT
Extended Forecast for

O'Fallon IL

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before midnight. Patchy fog after 2am. Otherwise, cloudy, with a low around 59. Light north wind increasing to 5 to 10 mph in the evening. Chance of precipitation is 60%.

    Low: 59 °F

    T-storms
    Likely then
    Isolated
    T-storms and
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, cloudy, with a high near 74. North wind 9 to 11 mph.

    High: 74 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 59. North wind around 6 mph becoming light and variable.

    Low: 59 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 76. South wind 6 to 10 mph. Chance of precipitation is 70%.

    High: 76 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Southwest wind 6 to 8 mph. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.

    High: 75 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before midnight. Patchy fog after 2am. Otherwise, cloudy, with a low around 59. Light north wind increasing to 5 to 10 mph in the evening. Chance of precipitation is 60%.
Wednesday
Patchy fog before 8am. Otherwise, cloudy, with a high near 74. North wind 9 to 11 mph.
Wednesday Night
Mostly cloudy, with a low around 59. North wind around 6 mph becoming light and variable.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 76. South wind 6 to 10 mph. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Southwest wind 6 to 8 mph. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 62.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 84.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
O'Fallon IL
 38.59°N 89.92°W (Elev. 551 ft)
Last Update:
5:52 pm CDT May 14, 2024
Forecast Valid:
7pm CDT May 14, 2024-6pm CDT May 21, 2024
 
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