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.

Fair

48°F

9°C

Humidity 61%
Wind Speed E 6 mph
Barometer 30.09 in (1019.0 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 13 Nov 8:54 pm CST
Extended Forecast for

2 Miles SW Fidelity IL

  • Tonight

    Tonight: Partly cloudy, with a low around 48. Southeast wind 5 to 8 mph.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 75. Southwest wind 7 to 9 mph.

    High: 75 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 57. Southwest wind 6 to 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 76. Southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 76 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40. North wind 8 to 10 mph.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Rain Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 48. Southeast wind 5 to 8 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 75. Southwest wind 7 to 9 mph.
Friday Night
Partly cloudy, with a low around 57. Southwest wind 6 to 10 mph.
Saturday
Partly sunny, with a high near 76. Southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
Mostly clear, with a low around 40. North wind 8 to 10 mph.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 36.
Monday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 56.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Tuesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 58.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 41.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 57.
Wednesday Night
A 50 percent chance of rain. Cloudy, with a low around 46.
Thursday
Rain likely. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Fidelity IL
 39.13°N 90.21°W (Elev. 600 ft)
Last Update:
9:41 pm CST Nov 13, 2025
Forecast Valid:
9pm CST Nov 13, 2025-6pm CST Nov 20, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation