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.

A Few Clouds

35°F

2°C

Humidity 67%
Wind Speed Calm
Barometer 30.05 in (1017.6 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 28 Feb 6:54 am CST
Extended Forecast for

4 Miles SSW Hardin IL

  • Today

    Today: A 30 percent chance of rain, mainly before 2pm. Mostly sunny, with a high near 60. Northeast wind 5 to 7 mph becoming south in the afternoon.

    High: 60 °F

    Mostly Sunny
    then Chance
    Rain

  • Tonight

    Tonight: Partly cloudy, with a low around 28. East wind 6 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Increasing clouds, with a high near 42. Northeast wind 8 to 10 mph.

    High: 42 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: Snow likely. Cloudy, with a low around 30. East wind 8 to 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 30 °F

    Snow Likely

  • Monday

    Monday: A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 41. Southeast wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 41 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain. Low around 37. Chance of precipitation is 90%.

    Low: 37 °F

    Rain Likely
    then Rain

  • Tuesday

    Tuesday: Rain, with thunderstorms also possible after noon. High near 55. Chance of precipitation is 90%.

    High: 55 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 46. Chance of precipitation is 80%.

    Low: 46 °F

    Rain

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.

    High: 61 °F

    Rain Likely

Detailed Forecast

Today
A 30 percent chance of rain, mainly before 2pm. Mostly sunny, with a high near 60. Northeast wind 5 to 7 mph becoming south in the afternoon.
Tonight
Partly cloudy, with a low around 28. East wind 6 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.
Sunday
A 20 percent chance of snow after noon. Increasing clouds, with a high near 42. Northeast wind 8 to 10 mph.
Sunday Night
Snow likely. Cloudy, with a low around 30. East wind 8 to 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Monday
A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 41. Southeast wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Monday Night
Rain. Low around 37. Chance of precipitation is 90%.
Tuesday
Rain, with thunderstorms also possible after noon. High near 55. Chance of precipitation is 90%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 46. Chance of precipitation is 80%.
Wednesday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.
Wednesday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.
Thursday
A 40 percent chance of rain. Partly sunny, with a high near 66.
Thursday Night
A 50 percent chance of rain. Partly cloudy, with a low around 52.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
Last Update:
3:57 am CST Feb 28, 2026
Forecast Valid:
7am CST Feb 28, 2026-6pm CST Mar 6, 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