National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

76°F

24°C

Humidity 74%
Wind Speed S 9 mph
Barometer 29.83 in (1009.5 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 16 May 6:54 pm CDT
Extended Forecast for

3 Miles SSW Dow IL

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 65. Southeast wind around 9 mph.

    Low: 65 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 87. South wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 87 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 68. South wind 15 to 17 mph, with gusts as high as 26 mph.

    Low: 68 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. South wind 16 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69. South wind around 16 mph, with gusts as high as 25 mph.

    Low: 69 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 86. Chance of precipitation is 90%.

    High: 86 °F

    Showers
    Likely then
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.

    Low: 57 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 69.

    High: 69 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 65. Southeast wind around 9 mph.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 87. South wind 11 to 18 mph, with gusts as high as 29 mph.
Sunday Night
Mostly clear, with a low around 68. South wind 15 to 17 mph, with gusts as high as 26 mph.
Monday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. South wind 16 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69. South wind around 16 mph, with gusts as high as 25 mph.
Tuesday
Showers and possibly a thunderstorm. High near 86. Chance of precipitation is 90%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Wednesday
Mostly cloudy, with a high near 69.
Wednesday Night
Mostly cloudy, with a low around 50.
Thursday
Partly sunny, with a high near 69.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 51.
Friday
Partly sunny, with a high near 73.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 55.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Dow IL
 39°N 90.33°W (Elev. 597 ft)
Last Update:
3:57 pm CDT May 16, 2026
Forecast Valid:
7pm CDT May 16, 2026-6pm CDT May 23, 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