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 and Breezy

74°F

23°C

Humidity 20%
Wind Speed SW 21 G 30 mph
Barometer 29.85 in (1010.7 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 27 Feb 1:54 pm CST
Extended Forecast for

4 Miles SSW Hardin IL

Red Flag Warning February 27, 02:55pm until February 27, 06:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning February 27, 02:55pm until February 27, 06:00pm

    NOW until 6:00pm Fri

    Red Flag Warning

  • This Afternoon

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 36. West wind around 7 mph becoming northeast after midnight.

    Low: 36 °F

    Clear

  • Saturday

    Saturday: A slight chance of rain between 2pm and 4pm. Mostly sunny, with a high near 63. Northeast wind 6 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 20%.

    High: 63 °F

    Sunny then
    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29. East wind 7 to 11 mph becoming north in the evening. Winds could gust as high as 23 mph.

    Low: 29 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of rain after noon, mixing with snow after 3pm. Mostly cloudy, with a high near 42. Northeast wind around 10 mph. Chance of precipitation is 20%.

    High: 42 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow. Low around 32. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 32 °F

    Rain/Snow

  • Monday

    Monday: A chance of rain and snow before noon, then a chance of rain. Cloudy, with a high near 42. Chance of precipitation is 40%.

    High: 42 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly after midnight. Cloudy, with a low around 37. Chance of precipitation is 70%.

    Low: 37 °F

    Rain Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 71. Southwest wind 11 to 17 mph, with gusts as high as 28 mph.
Tonight
Clear, with a low around 36. West wind around 7 mph becoming northeast after midnight.
Saturday
A slight chance of rain between 2pm and 4pm. Mostly sunny, with a high near 63. Northeast wind 6 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 29. East wind 7 to 11 mph becoming north in the evening. Winds could gust as high as 23 mph.
Sunday
A slight chance of rain after noon, mixing with snow after 3pm. Mostly cloudy, with a high near 42. Northeast wind around 10 mph. Chance of precipitation is 20%.
Sunday Night
Rain and snow. Low around 32. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Monday
A chance of rain and snow before noon, then a chance of rain. Cloudy, with a high near 42. Chance of precipitation is 40%.
Monday Night
Rain likely, mainly after midnight. Cloudy, with a low around 37. Chance of precipitation is 70%.
Tuesday
Rain, with thunderstorms also possible after noon. High near 54. Chance of precipitation is 90%.
Tuesday Night
Rain likely, with thunderstorms also possible after midnight. Cloudy, with a low around 45. Chance of precipitation is 70%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 62. Chance of precipitation is 70%.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.
Thursday
Rain likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
Last Update:
1:36 pm CST Feb 27, 2026
Forecast Valid:
2pm CST Feb 27, 2026-6pm CST Mar 5, 2026
 
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