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

69°F

21°C

Humidity 39%
Wind Speed SE 12 G 17 mph
Barometer 30.10 in (1018.8 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 14 May 11:54 am CDT
Extended Forecast for

2 Miles WNW Fidelity IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 73. South wind 7 to 9 mph.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: A chance of showers, then showers likely and possibly a thunderstorm after 4am. Increasing clouds, with a low around 53. Southeast wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    Low: 53 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers and thunderstorms likely before 10am, then a slight chance of showers between 10am and 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 80. South wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 63. South wind around 11 mph.

    Low: 63 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Partly sunny, with a high near 82. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Breezy.

    High: 87 °F

    Breezy. Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 73. South wind 7 to 9 mph.
Tonight
A chance of showers, then showers likely and possibly a thunderstorm after 4am. Increasing clouds, with a low around 53. Southeast wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely before 10am, then a slight chance of showers between 10am and 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 80. South wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 63. South wind around 11 mph.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Partly sunny, with a high near 82. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Mostly clear, with a low around 67.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Breezy.
Monday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 79. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Fidelity IL
 39.15°N 90.18°W (Elev. 610 ft)
Last Update:
10:46 am CDT May 14, 2026
Forecast Valid:
12pm CDT May 14, 2026-6pm CDT May 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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