Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Overcast

32°F

0°C

Humidity 73%
Wind Speed E 6 mph
Barometer 29.98 in (1015.5 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 11 Dec 12:54 pm CST
Extended Forecast for

3 Miles NNE Grafton IL

  • This Afternoon

    This Afternoon: A 50 percent chance of snow after 3pm.  Cloudy, with a high near 35. Southeast wind 6 to 10 mph.

    High: 35 °F

    Chance Snow

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. East wind 6 to 11 mph becoming north after midnight. Winds could gust as high as 21 mph.

    Low: 29 °F

    Mostly Cloudy

  • Friday

    Friday: Cloudy, with a high near 35. Northwest wind around 10 mph.

    High: 35 °F

    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21. Northwest wind around 8 mph.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: Snow likely, mainly after noon.  Cloudy, with a temperature falling to around 17 by 5pm. North wind 7 to 10 mph.  Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 24 °F

    Chance Snow
    then Snow
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 0.

    Low: 0 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny and cold, with a high near 12.

    High: 12 °F

    Cold

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 3.

    Low: 3 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 38.

    High: 38 °F

    Sunny

Detailed Forecast

This Afternoon
A 50 percent chance of snow after 3pm. Cloudy, with a high near 35. Southeast wind 6 to 10 mph.
Tonight
Mostly cloudy, with a low around 29. East wind 6 to 11 mph becoming north after midnight. Winds could gust as high as 21 mph.
Friday
Cloudy, with a high near 35. Northwest wind around 10 mph.
Friday Night
Mostly cloudy, with a low around 21. Northwest wind around 8 mph.
Saturday
Snow likely, mainly after noon. Cloudy, with a temperature falling to around 17 by 5pm. North wind 7 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Saturday Night
Partly cloudy, with a low around 0.
Sunday
Sunny and cold, with a high near 12.
Sunday Night
Mostly clear, with a low around 3.
Monday
Sunny, with a high near 38.
Monday Night
Partly cloudy, with a low around 24.
Tuesday
Mostly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Grafton IL
 39.02°N 90.41°W (Elev. 614 ft)
10:31 am CST Dec 11, 2025
1pm CST Dec 11, 2025-6pm CST Dec 17, 2025
 
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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