Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Thunderstorm in Vicinity

74°F

23°C

Humidity 85%
Wind Speed SE 17 G 26 mph
Barometer 29.64 in (1003.3 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 19 May 9:54 pm CDT
Extended Forecast for

Dow IL

Tornado Watch May 19, 11:19pm until May 20, 03:00am
Click here for hazard details and duration
Tornado Watch
  •  
    Tornado Watch May 19, 11:19pm until May 20, 03:00am

    NOW until 3:00am Tue

    Tornado Watch

  • Tonight

    Low: 65 °F

    Severe
    Thunderstorms

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 8am, then scattered showers and thunderstorms, mainly between 8am and 4pm.  Mostly cloudy, with a high near 79. Southeast wind around 16 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.  Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely then
    Scattered
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 53. West wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 53 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 67. West wind 15 to 18 mph, with gusts as high as 29 mph.

    High: 67 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am.  Partly cloudy, with a low around 49. West wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 49 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

Tonight
Showers and thunderstorms before 1am, then showers and possibly a thunderstorm, mainly after 1am. Some of the storms could be severe and produce heavy rainfall. Low around 65. Southeast wind around 16 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Tuesday
Showers likely and possibly a thunderstorm before 8am, then scattered showers and thunderstorms, mainly between 8am and 4pm. Mostly cloudy, with a high near 79. Southeast wind around 16 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 60%.
Tuesday Night
Partly cloudy, with a low around 53. West wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday
Mostly sunny, with a high near 67. West wind 15 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 49. West wind 10 to 14 mph, with gusts as high as 22 mph.
Thursday
Partly sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 67.
Friday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 50.
Saturday
A 20 percent chance of showers. Partly sunny, with a high near 68.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 54.
Sunday
A 50 percent chance of showers. Partly sunny, with a high near 68.
Sunday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Memorial Day
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 72.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Dow IL
 39.04°N 90.33°W (Elev. 623 ft)
10:37 pm CDT May 19, 2025
11pm CDT May 19, 2025-6pm CDT May 26, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database