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.

Fair

53°F

12°C

Humidity 64%
Wind Speed E 14 mph
Barometer 29.73 in (1006.8 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 14 Mar 10:54 pm CDT
Extended Forecast for

2 Miles NNE Grafton IL

Wind Advisory March 15, 10:00am until March 16, 12:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. South wind 14 to 16 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 2pm. High near 66. Breezy, with a south wind 18 to 22 mph becoming west in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 90%.

    High: 66 °F

    Breezy.
    Chance
    T-storms then
    Rain

  • Sunday Night

    Sunday Night: Rain likely before 9pm, then a chance of snow. Mostly cloudy, with a low around 20. Breezy, with a northwest wind 25 to 29 mph, with gusts as high as 47 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 20 °F

    Rain/Snow
    Likely and
    Breezy then
    Chance Snow
    and Blustery

  • Monday

    Monday: A 20 percent chance of snow before 1pm. Mostly cloudy, with a high near 29. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 44 mph.

    High: 29 °F

    Slight Chance
    Snow and
    Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 13. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 29 mph.

    Low: 13 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.

    Low: 32 °F

    Slight Chance
    Snow then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 54. South wind 14 to 16 mph, with gusts as high as 25 mph.
Sunday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 2pm. High near 66. Breezy, with a south wind 18 to 22 mph becoming west in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 90%.
Sunday Night
Rain likely before 9pm, then a chance of snow. Mostly cloudy, with a low around 20. Breezy, with a northwest wind 25 to 29 mph, with gusts as high as 47 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday
A 20 percent chance of snow before 1pm. Mostly cloudy, with a high near 29. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 44 mph.
Monday Night
Mostly clear, with a low around 13. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 29 mph.
Tuesday
Mostly sunny, with a high near 37.
Tuesday Night
A slight chance of snow before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 40.
Thursday
Sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Grafton IL
 39°N 90.41°W (Elev. 682 ft)
Last Update:
11:16 pm CDT Mar 14, 2026
Forecast Valid:
11pm CDT Mar 14, 2026-6pm CDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation