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

75°F

24°C

Humidity 94%
Wind Speed E 6 mph
Barometer 29.89 in (1011.6 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 26 Jun 7:54 pm CDT
Extended Forecast for

4 Miles W Kane IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 11pm. Patchy fog between 2am and 5am. Otherwise, mostly cloudy, with a low around 64. East wind around 6 mph becoming calm after midnight.

    Low: 64 °F

    Chance
    T-storms and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 82. Light and variable wind becoming southwest around 6 mph in the morning.

    High: 82 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 69. Southeast wind around 7 mph.

    Low: 69 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 105. South wind 7 to 11 mph.

    High: 92 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. South wind 7 to 9 mph.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74.

    Low: 74 °F

    Clear

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly before 11pm. Patchy fog between 2am and 5am. Otherwise, mostly cloudy, with a low around 64. East wind around 6 mph becoming calm after midnight.
Saturday
Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 82. Light and variable wind becoming southwest around 6 mph in the morning.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 69. Southeast wind around 7 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 105. South wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 73. South wind 7 to 9 mph.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Clear, with a low around 74.
Wednesday
Sunny, with a high near 95.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Sunny, with a high near 96.
Thursday Night
Mostly clear, with a low around 74.
Friday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Kane IL
 39.18°N 90.41°W (Elev. 548 ft)
Last Update:
7:11 pm CDT Jun 26, 2026
Forecast Valid:
8pm CDT Jun 26, 2026-6pm CDT Jul 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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