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

47°F

8°C

Humidity 46%
Wind Speed W 13 mph
Barometer 29.80 in (1009.1 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 28 Jan 4:54 pm CST
Extended Forecast for

Grafton IL

  • Tonight

    Tonight: Clear, with a low around 32. West wind 7 to 11 mph, with gusts as high as 24 mph.

    Low: 32 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 49. Northwest wind 3 to 8 mph.

    High: 49 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 5am. Mostly clear, with a low around 31. Calm wind becoming southeast 5 to 7 mph after midnight.

    Low: 31 °F

    Mostly Clear
    then Slight
    Chance Rain

  • Thursday

    Thursday: Rain, mainly after noon. High near 47. Southeast wind 7 to 10 mph. Chance of precipitation is 80%.

    High: 47 °F

    Chance Rain
    then Rain

  • Thursday Night

    Thursday Night: Rain, mainly before midnight. Low around 42. Southeast wind 7 to 10 mph becoming southwest after midnight. Chance of precipitation is 80%.

    Low: 42 °F

    Rain then
    Chance Rain

  • Friday

    Friday: A 30 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 50.

    High: 50 °F

    Chance Rain

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 32. West wind 7 to 11 mph, with gusts as high as 24 mph.
Wednesday
Sunny, with a high near 49. Northwest wind 3 to 8 mph.
Wednesday Night
A 20 percent chance of rain after 5am. Mostly clear, with a low around 31. Calm wind becoming southeast 5 to 7 mph after midnight.
Thursday
Rain, mainly after noon. High near 47. Southeast wind 7 to 10 mph. Chance of precipitation is 80%.
Thursday Night
Rain, mainly before midnight. Low around 42. Southeast wind 7 to 10 mph becoming southwest after midnight. Chance of precipitation is 80%.
Friday
A 30 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 50.
Friday Night
Partly cloudy, with a low around 30.
Saturday
Mostly sunny, with a high near 46.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Partly sunny, with a high near 59.
Sunday Night
Mostly cloudy, with a low around 32.
Monday
Mostly sunny, with a high near 43.
Monday Night
Partly cloudy, with a low around 25.
Tuesday
Mostly sunny, with a high near 40.
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ABOUT THIS FORECAST

 
Point Forecast:
Grafton IL
 38.98°N 90.42°W (Elev. 673 ft)
Last Update:
2:53 pm CST Jan 28, 2025
Forecast Valid:
5pm CST Jan 28, 2025-6pm CST Feb 4, 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