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

76°F

24°C

Humidity 94%
Wind Speed Calm
Barometer 29.89 in (1011.6 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 15 Jul 10:54 pm CDT
Extended Forecast for

2 Miles WNW Elsah IL

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 73. Light southwest wind.

    Low: 73 °F

    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Patchy fog before 8am. Otherwise, sunny, with a high near 94. Heat index values as high as 103. Light southwest wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 30%.

    High: 94 °F

    Chance
    T-storms and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 75. Southwest wind around 6 mph.

    Low: 75 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 88. West wind 6 to 8 mph.

    High: 88 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Northeast wind 3 to 6 mph.

    Low: 70 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.

    High: 84 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.

    Low: 73 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 91.

    High: 91 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.

    Low: 75 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 73. Light southwest wind.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Patchy fog before 8am. Otherwise, sunny, with a high near 94. Heat index values as high as 103. Light southwest wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 30%.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 75. Southwest wind around 6 mph.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 88. West wind 6 to 8 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Northeast wind 3 to 6 mph.
Friday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 91.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 93.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Tuesday
Mostly sunny, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Elsah IL
 38.96°N 90.39°W (Elev. 407 ft)
Last Update:
10:07 pm CDT Jul 15, 2025
Forecast Valid:
11pm CDT Jul 15, 2025-6pm CDT Jul 22, 2025
 
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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