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

69°F

21°C

Humidity 90%
Wind Speed Calm
Barometer 30.19 in (1021.8 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 6 Aug 1:54 am CDT
Extended Forecast for

2 Miles S Hardin IL

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 88 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 70. East wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming south 5 to 7 mph in the morning.

    High: 91 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 71. Southeast wind around 6 mph.

    Low: 71 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly clear, with a low around 65. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 70. East wind around 5 mph becoming calm in the evening.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming south 5 to 7 mph in the morning.
Thursday Night
Partly cloudy, with a low around 71. Southeast wind around 6 mph.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny, with a high near 92.
Saturday Night
Partly cloudy, with a low around 74.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Hardin IL
 39.12°N 90.61°W (Elev. 420 ft)
Last Update:
3:11 am CDT Aug 6, 2025
Forecast Valid:
3am CDT Aug 6, 2025-6pm CDT Aug 12, 2025
 
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