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

60°F

16°C

Humidity 86%
Wind Speed SE 3 mph
Barometer 29.91 in (1012.4 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 16 Jun 12:54 am CDT
Extended Forecast for

4 Miles SW Hardin IL

Flood Warning June 16, 07:00pm until June 19, 07:00am
Click here for hazard details and duration
Flood Warning

  • Overnight

    Overnight: Mostly clear, with a low around 58. South wind 3 to 5 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 81. South wind 7 to 10 mph becoming west in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58. West wind 5 to 7 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 90. Breezy, with a south wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 41 mph.

    High: 90 °F

    Chance
    T-storms and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms, mainly before 1am. Low around 66. West wind 7 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 90%.

    Low: 66 °F

    T-storms then
    T-storms
    Likely

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 58. South wind 3 to 5 mph.
Tuesday
A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 81. South wind 7 to 10 mph becoming west in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 40%.
Tuesday Night
Mostly clear, with a low around 58. West wind 5 to 7 mph becoming calm in the evening.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 90. Breezy, with a south wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 41 mph.
Wednesday Night
Showers and thunderstorms, mainly before 1am. Low around 66. West wind 7 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 90%.
Thursday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 59.
Juneteenth
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 61.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 84.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 84. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Hardin IL
 39.1°N 90.67°W (Elev. 430 ft)
Last Update:
1:26 am CDT Jun 16, 2026
Forecast Valid:
1am CDT Jun 16, 2026-6pm CDT Jun 22, 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