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

42°F

6°C

Humidity 96%
Wind Speed Calm
Barometer 30.01 in (1016.2 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 15 Feb 7:54 pm CST
Extended Forecast for

Fieldon IL

  • Tonight

    Tonight: Patchy dense fog between 4am and 5am. Otherwise, partly cloudy, with a low around 39. Calm wind becoming southwest around 6 mph after midnight.

    Low: 39 °F

    Mostly Clear
    then Patchy
    Dense Fog

  • Washington's Birthday

    Washington's Birthday: Patchy dense fog before 8am. Otherwise, mostly sunny, with a high near 65. South wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 65 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 43. South wind around 8 mph.

    Low: 43 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 64. South wind 8 to 16 mph, with gusts as high as 26 mph.

    High: 64 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 56. Southwest wind 16 to 18 mph, with gusts as high as 31 mph.

    Low: 56 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 70. Chance of precipitation is 20%.

    High: 70 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 36.

    Low: 36 °F

    Slight Chance
    T-storms then
    Mostly Clear

Detailed Forecast

Tonight
Patchy dense fog between 4am and 5am. Otherwise, partly cloudy, with a low around 39. Calm wind becoming southwest around 6 mph after midnight.
Washington's Birthday
Patchy dense fog before 8am. Otherwise, mostly sunny, with a high near 65. South wind 6 to 10 mph, with gusts as high as 21 mph.
Monday Night
Mostly cloudy, with a low around 43. South wind around 8 mph.
Tuesday
Mostly cloudy, with a high near 64. South wind 8 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 56. Southwest wind 16 to 18 mph, with gusts as high as 31 mph.
Wednesday
Sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
A slight chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 70. Chance of precipitation is 20%.
Thursday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 36.
Friday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 50.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 30.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 46.
Saturday Night
A 20 percent chance of rain. Mostly clear, with a low around 27.
Sunday
Mostly sunny, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fieldon IL
 39.11°N 90.49°W (Elev. 640 ft)
Last Update:
7:41 pm CST Feb 15, 2026
Forecast Valid:
8pm CST Feb 15, 2026-6pm CST Feb 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation