Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Light Rain

73°F

23°C

Humidity 71%
Wind Speed S 5 mph
Barometer 29.71 in (1005.5 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 17 Apr 9:54 pm CDT
Extended Forecast for

3 Miles SSW Dow IL

Flood Watch until April 18, 04:00am
Tornado Watch April 17, 10:31pm until April 17, 11:00pm
Severe T-storm Warning until April 17, 10:45pm
Tornado Warning until April 17, 10:45pm
Click here for hazard details and duration
Flood Watch
...
...
...
  •  
    Flood Watch until April 18, 04:00am
    Tornado Watch April 17, 10:31pm until April 17, 11:00pm
    Severe T-storm Warning until April 17, 10:45pm
    Tornado Warning until April 17, 10:45pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 46 °F

    Severe
    Thunderstorms
    then Showers

  • Saturday

    Saturday: A 30 percent chance of showers, mainly before 7am.  Cloudy through mid morning, then gradual clearing, with a high near 57. Northwest wind around 17 mph, with gusts as high as 26 mph.

    High: 57 °F

    Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 39. Northwest wind 6 to 14 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 66. West wind 6 to 14 mph, with gusts as high as 24 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Northwest wind 6 to 9 mph becoming northeast after midnight.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 4am, then showers likely. Some of the storms could be severe. Low around 46. South wind 11 to 16 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 100%.
Saturday
A 30 percent chance of showers, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 57. Northwest wind around 17 mph, with gusts as high as 26 mph.
Saturday Night
Clear, with a low around 39. Northwest wind 6 to 14 mph becoming west after midnight. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 66. West wind 6 to 14 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 39. Northwest wind 6 to 9 mph becoming northeast after midnight.
Monday
Sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 57.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Dow IL
 39°N 90.33°W (Elev. 597 ft)
10:11 pm CDT Apr 17, 2026
10pm CDT Apr 17, 2026-6pm CDT Apr 24, 2026
 
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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