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

73°F

23°C

Humidity 24%
Wind Speed W 17 mph
Barometer 29.68 in (1004.8 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 7 Nov 2:54 pm CST
Extended Forecast for

3 Miles NNE Grafton IL

  • Tonight

    Tonight: Mostly clear, with a low around 43. West wind 5 to 8 mph.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: A 50 percent chance of rain, mainly after 3pm. Mostly cloudy, with a high near 63. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 63 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A chance of rain before midnight, then a chance of sprinkles and flurries between midnight and 3am, then a chance of flurries after 3am. Mostly cloudy, with a low around 34. Northwest wind 9 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.

    Low: 34 °F

    Chance Rain
    then Chance
    Sprinkles/Flurries

  • Sunday

    Sunday: A chance of flurries before 1pm, then a chance of sprinkles and flurries between 1pm and 4pm, then a chance of flurries after 4pm. Mostly sunny, with a high near 39. Northwest wind 15 to 18 mph, with gusts as high as 30 mph.

    High: 39 °F

    Mostly Sunny
    then Chance
    Sprinkles/Flurries

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 25. Northwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 41.

    High: 41 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 43. West wind 5 to 8 mph.
Saturday
A 50 percent chance of rain, mainly after 3pm. Mostly cloudy, with a high near 63. Calm wind becoming west 5 to 8 mph in the afternoon.
Saturday Night
A chance of rain before midnight, then a chance of sprinkles and flurries between midnight and 3am, then a chance of flurries after 3am. Mostly cloudy, with a low around 34. Northwest wind 9 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Sunday
A chance of flurries before 1pm, then a chance of sprinkles and flurries between 1pm and 4pm, then a chance of flurries after 4pm. Mostly sunny, with a high near 39. Northwest wind 15 to 18 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 25. Northwest wind 11 to 14 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 41.
Monday Night
Mostly clear, with a low around 27.
Veterans Day
Partly sunny, with a high near 56.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 38.
Thursday
Mostly sunny, with a high near 61.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Grafton IL
 39.02°N 90.41°W (Elev. 614 ft)
Last Update:
3:16 pm CST Nov 7, 2025
Forecast Valid:
3pm CST Nov 7, 2025-6pm CST Nov 14, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation