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.

Mostly Cloudy and Breezy

69°F

21°C

Humidity 57%
Wind Speed S 22 G 35 mph
Barometer 29.40 in (995.1 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 15 Mar 12:54 pm CDT
Extended Forecast for

5 Miles WNW Dow IL

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

    NOW until 12:00pm Mon

    Wind Advisory

  • This Afternoon

    High: 70 °F

    T-storms and
    Breezy

  • Tonight

    Tonight: Rain before 8pm, then a chance of rain and snow between 8pm and midnight, then a chance of snow after midnight. Low around 20. Breezy, with a west wind 24 to 26 mph, with gusts as high as 49 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 20 °F

    Rain/Snow and
    Breezy then
    Chance Snow
    and Blustery

  • Monday

    Monday: A chance of snow before 11am, then a chance of flurries between 11am and 1pm. Cloudy, with a high near 27. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 30%.

    High: 27 °F

    Blustery.
    Chance Snow
    then Chance
    Flurries

  • Monday Night

    Monday Night: Partly cloudy, with a low around 12. Northwest wind 11 to 18 mph, with gusts as high as 30 mph.

    Low: 12 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36. Northwest wind around 7 mph becoming south in the afternoon.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow before 4am, then a chance of rain. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.

    Low: 30 °F

    Slight Chance
    Snow then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 30 percent chance of rain before 7am. Mostly sunny, with a high near 62.

    High: 62 °F

    Chance Rain
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Isolated showers and thunderstorms between 2pm and 3pm, then showers and possibly a thunderstorm after 3pm. High near 70. Breezy, with a south wind around 24 mph, with gusts as high as 40 mph. Chance of precipitation is 80%.
Tonight
Rain before 8pm, then a chance of rain and snow between 8pm and midnight, then a chance of snow after midnight. Low around 20. Breezy, with a west wind 24 to 26 mph, with gusts as high as 49 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Monday
A chance of snow before 11am, then a chance of flurries between 11am and 1pm. Cloudy, with a high near 27. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 12. Northwest wind 11 to 18 mph, with gusts as high as 30 mph.
Tuesday
Mostly sunny, with a high near 36. Northwest wind around 7 mph becoming south in the afternoon.
Tuesday Night
A chance of snow before 4am, then a chance of rain. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of rain before 7am. Mostly sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 44.
Friday
Mostly sunny, with a high near 75.
Friday Night
Mostly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Dow IL
 39.07°N 90.41°W (Elev. 548 ft)
Last Update:
1:21 pm CDT Mar 15, 2026
Forecast Valid:
1pm CDT Mar 15, 2026-6pm CDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation