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

69°F

21°C

Humidity 90%
Wind Speed E 5 mph
Barometer 29.95 in (1013.7 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 26 Jun 1:54 am CDT
Extended Forecast for

3 Miles E Dow IL

Flood Watch June 26, 02:17am until June 26, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 26, 02:17am until June 26, 07:00pm

    NOW until 7:00pm Fri

    Flood Watch

  • Overnight

    Low: 68 °F

    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm, mainly before 1pm, then showers and thunderstorms likely after 1pm. High near 79. Southeast wind around 9 mph becoming southwest in the afternoon. Chance of precipitation is 100%.

    High: 79 °F

    Showers then
    T-storms
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 65. North wind 3 to 8 mph.

    Low: 65 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 7pm. Partly cloudy, with a low around 70. Southeast wind 5 to 8 mph.

    Low: 70 °F

    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 68. East wind around 6 mph. Chance of precipitation is 100%.
Friday
Showers and possibly a thunderstorm, mainly before 1pm, then showers and thunderstorms likely after 1pm. High near 79. Southeast wind around 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 65. North wind 3 to 8 mph.
Saturday
Partly sunny, with a high near 83. Light and variable wind.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 7pm. Partly cloudy, with a low around 70. Southeast wind 5 to 8 mph.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Clear, with a low around 75.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny and hot, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Dow IL
 39.04°N 90.24°W (Elev. 600 ft)
Last Update:
1:26 am CDT Jun 26, 2026
Forecast Valid:
2am 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