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

56°F

13°C

Humidity 70%
Wind Speed SW 6 mph
Barometer 30.02 in (1016.5 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 5 Nov 7:54 am CST
Extended Forecast for

3 Miles NNE Grafton IL

  • Today

    Today: Sunny, with a high near 69. West wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 24 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 37. North wind 5 to 7 mph becoming east after midnight.

    Low: 37 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 63. Southeast wind 6 to 14 mph, with gusts as high as 24 mph.

    High: 63 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 55. Southeast wind 10 to 13 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: A 20 percent chance of rain before noon. Mostly sunny, with a high near 71. West wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 71 °F

    Slight Chance
    Rain then
    Sunny

  • Friday Night

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

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 69. West wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 24 mph.
Tonight
Clear, with a low around 37. North wind 5 to 7 mph becoming east after midnight.
Thursday
Sunny, with a high near 63. Southeast wind 6 to 14 mph, with gusts as high as 24 mph.
Thursday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 55. Southeast wind 10 to 13 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Friday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 71. West wind 9 to 13 mph, with gusts as high as 21 mph.
Friday Night
Mostly clear, with a low around 42.
Saturday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 64.
Saturday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 43.
Sunday Night
Mostly clear, with a low around 24.
Monday
Sunny, with a high near 43.
Monday Night
Mostly clear, with a low around 27.
Veterans Day
Mostly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Grafton IL
 39.02°N 90.41°W (Elev. 614 ft)
Last Update:
6:31 am CST Nov 5, 2025
Forecast Valid:
8am CST Nov 5, 2025-6pm CST Nov 11, 2025
 
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