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.

A Few Clouds

50°F

10°C

Humidity 57%
Wind Speed SW 14 mph
Barometer 29.57 in (1001.2 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 10 Dec 12:54 am CST
Extended Forecast for

3 Miles NNE Grafton IL

Wind Advisory December 10, 03:00am until December 10, 12:00pm
Click here for hazard details and duration
Wind Advisory

  • Overnight

    Overnight: A chance of rain or sprinkles before 4am, then a chance of sprinkles with a slight chance of rain between 4am and 5am. Cloudy, with a low around 36. West wind 16 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    Low: 36 °F

    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 33 by 5pm. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 47 mph.

    High: 39 °F⇓

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24. Northwest wind 6 to 11 mph becoming light after midnight.

    Low: 24 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow after noon. Increasing clouds, with a high near 37. Light and variable wind becoming southeast 5 to 8 mph in the afternoon.

    High: 37 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 31. Southeast wind 8 to 10 mph becoming northwest after midnight.

    Low: 31 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 29.

    High: 29 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 6.

    Low: 6 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of rain or sprinkles before 4am, then a chance of sprinkles with a slight chance of rain between 4am and 5am. Cloudy, with a low around 36. West wind 16 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Wednesday
Mostly cloudy, with a temperature falling to around 33 by 5pm. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 47 mph.
Wednesday Night
Mostly cloudy, with a low around 24. Northwest wind 6 to 11 mph becoming light after midnight.
Thursday
A 20 percent chance of snow after noon. Increasing clouds, with a high near 37. Light and variable wind becoming southeast 5 to 8 mph in the afternoon.
Thursday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 31. Southeast wind 8 to 10 mph becoming northwest after midnight.
Friday
Partly sunny, with a high near 37.
Friday Night
Mostly cloudy, with a low around 19.
Saturday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 6.
Sunday
Sunny and cold, with a high near 19.
Sunday Night
Mostly clear, with a low around 11.
Monday
Mostly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Mostly cloudy, with a high near 44.
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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:
1:21 am CST Dec 10, 2025
Forecast Valid:
1am CST Dec 10, 2025-6pm CST Dec 16, 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