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

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Overcast

70°F

21°C

Humidity 97%
Wind Speed E 9 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 69°F (21°C)
Visibility 7.00 mi
Last update 15 Oct 9:54 am CDT
Extended Forecast for

3 Miles SSE Michael IL

  • Today

    Today: Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. Patchy fog before 11am. High near 79. Southeast wind 6 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    High: 79 °F

    Showers and
    Patchy Fog

  • Tonight

    Tonight: Showers and thunderstorms likely before midnight, then isolated showers between midnight and 1am. Mostly cloudy, with a low around 45. Northwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    Low: 45 °F

    Showers
    Likely then
    Isolated
    Showers

  • Friday

    Friday: Isolated showers between 3pm and 4pm. Partly sunny, with a high near 57. Northwest wind 15 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 57 °F

    Mostly Sunny
    then Isolated
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 36. North wind 6 to 15 mph, with gusts as high as 28 mph.

    Low: 36 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 61. Light northeast wind.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. Patchy fog before 11am. High near 79. Southeast wind 6 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Tonight
Showers and thunderstorms likely before midnight, then isolated showers between midnight and 1am. Mostly cloudy, with a low around 45. Northwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Friday
Isolated showers between 3pm and 4pm. Partly sunny, with a high near 57. Northwest wind 15 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 36. North wind 6 to 15 mph, with gusts as high as 28 mph.
Saturday
Sunny, with a high near 61. Light northeast wind.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 38.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Michael IL
 39.21°N 90.61°W (Elev. 420 ft)
Last Update:
9:16 am CDT Oct 15, 2026
Forecast Valid:
10am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation