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

61°F

16°C

Humidity 87%
Wind Speed S 5 mph
Barometer 29.84 in (1010.2 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 10 Mar 1:54 am CDT
Extended Forecast for

5 Miles SSW Fieldon IL

  • Overnight

    Overnight: Mostly clear, with a low around 61. South wind around 8 mph.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. South wind 7 to 17 mph, with gusts as high as 28 mph.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 52. Southwest wind 13 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

    Low: 52 °F

    Chance
    T-storms then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then a chance of showers between 1pm and 2pm, then a chance of rain after 2pm. Temperature falling to around 48 by 5pm. Southwest wind 10 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%.

    High: 66 °F⇓

    T-storms then
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 34. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 34 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 62.

    High: 62 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 61. South wind around 8 mph.
Tuesday
Sunny, with a high near 84. South wind 7 to 17 mph, with gusts as high as 28 mph.
Tuesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 52. Southwest wind 13 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm before 1pm, then a chance of showers between 1pm and 2pm, then a chance of rain after 2pm. Temperature falling to around 48 by 5pm. Southwest wind 10 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%.
Wednesday Night
Partly cloudy, with a low around 34. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 56.
Thursday Night
Mostly cloudy, with a low around 46.
Friday
Mostly cloudy, with a high near 62.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 69.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 47.
Sunday
Rain likely. Cloudy, with a high near 60. Chance of precipitation is 70%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Fieldon IL
 39.05°N 90.55°W (Elev. 502 ft)
Last Update:
1:25 am CDT Mar 10, 2026
Forecast Valid:
2am CDT Mar 10, 2026-6pm CDT Mar 16, 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