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

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

55°F

13°C

Humidity 64%
Wind Speed S 3 mph
Barometer 29.90 in (1012.3 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 8 May 7:54 am CDT
Extended Forecast for

Kane ILSimilar City Names

  • Today

    Today: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. High near 71. South wind 7 to 11 mph becoming west in the afternoon. Chance of precipitation is 80%.

    High: 71 °F

    Partly Sunny
    then Showers

  • Tonight

    Tonight: Showers and thunderstorms before 11pm, then isolated showers between 11pm and midnight. Low around 49. Southwest wind 3 to 6 mph. Chance of precipitation is 80%.

    Low: 49 °F

    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 78. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.

    High: 78 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers after 1am. Increasing clouds, with a low around 53. Southwest wind 5 to 7 mph becoming north after midnight.

    Low: 53 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 66. North wind around 9 mph.

    High: 66 °F

    Partly Sunny

  • Sunday Night

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

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.

    High: 77 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

Today
Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. High near 71. South wind 7 to 11 mph becoming west in the afternoon. Chance of precipitation is 80%.
Tonight
Showers and thunderstorms before 11pm, then isolated showers between 11pm and midnight. Low around 49. Southwest wind 3 to 6 mph. Chance of precipitation is 80%.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 78. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.
Saturday Night
A 40 percent chance of showers after 1am. Increasing clouds, with a low around 53. Southwest wind 5 to 7 mph becoming north after midnight.
Sunday
Partly sunny, with a high near 66. North wind around 9 mph.
Sunday Night
Mostly clear, with a low around 42.
Monday
Sunny, with a high near 69.
Monday Night
Mostly clear, with a low around 46.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Kane ILSimilar City Names
 39.2°N 90.35°W (Elev. 551 ft)
Last Update:
7:56 am CDT May 8, 2026
Forecast Valid:
8am CDT May 8, 2026-6pm CDT May 14, 2026
 
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Additional Resources

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Chance of Precipitation