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.

Overcast

70°F

21°C

Humidity 97%
Wind Speed Calm
Barometer 29.95 in (1013.9 mb)
Dewpoint 69°F (21°C)
Visibility 7.00 mi
Last update 26 Jun 5:54 am CDT
Extended Forecast for

2 Miles WNW Elsah IL

Flood Watch June 26, 05:59am until June 26, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 26, 05:59am until June 26, 07:00pm

    NOW until 7:00pm Fri

    Flood Watch

  • Overnight

    Low: 70 °F

    Heavy Rain

  • Friday

    Friday: Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Some of the storms could produce heavy rainfall. High near 80. Southeast wind 7 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 100%.

    High: 80 °F

    Heavy Rain
    then T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 66. North wind 3 to 8 mph.

    Low: 66 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 84. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 84 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 7pm. Partly cloudy, with a low around 72. Southeast wind around 7 mph.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 70. Southeast wind around 6 mph. Chance of precipitation is 80%.
Friday
Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Some of the storms could produce heavy rainfall. High near 80. Southeast wind 7 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 100%.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 66. North wind 3 to 8 mph.
Saturday
Partly sunny, with a high near 84. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 7pm. Partly cloudy, with a low around 72. Southeast wind around 7 mph.
Sunday
Sunny, with a high near 95.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny and hot, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Elsah IL
 38.96°N 90.39°W (Elev. 407 ft)
Last Update:
3:36 am CDT Jun 26, 2026
Forecast Valid:
5am CDT Jun 26, 2026-6pm CDT Jul 2, 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