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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.

Light Rain

68°F

20°C

Humidity 93%
Wind Speed E 9 mph
Barometer 29.90 in (1012.0 mb)
Dewpoint 66°F (19°C)
Visibility 7.00 mi
Last update 16 May 10:54 am CDT
Extended Forecast for

Dow IL

  • Today

    Today: Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. High near 82. Southwest wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.

    High: 82 °F

    Showers

  • Tonight

    Tonight: A 30 percent chance of showers before 7pm. Mostly cloudy, with a low around 65. Southeast wind 8 to 10 mph.

    Low: 65 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 87. Breezy, with a south wind 11 to 20 mph, with gusts as high as 29 mph.

    High: 87 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Sunday Night

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

    Low: 68 °F

    Partly Cloudy

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 87. Breezy, with a south wind 16 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.

    High: 87 °F

    Breezy.
    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 80%.

    High: 84 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.

    Low: 56 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 20 percent chance of showers. Mostly cloudy, with a high near 70.

    High: 70 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. High near 82. Southwest wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Tonight
A 30 percent chance of showers before 7pm. Mostly cloudy, with a low around 65. Southeast wind 8 to 10 mph.
Sunday
Sunny, with a high near 87. Breezy, with a south wind 11 to 20 mph, with gusts as high as 29 mph.
Sunday Night
Partly cloudy, with a low around 68. South wind 15 to 17 mph, with gusts as high as 26 mph.
Monday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 87. Breezy, with a south wind 16 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Tuesday
Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 80%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of showers. Mostly cloudy, with a high near 70.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Mostly sunny, with a high near 71.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 51.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dow IL
 39.04°N 90.33°W (Elev. 623 ft)
Last Update:
10:51 am CDT May 16, 2026
Forecast Valid:
11am CDT May 16, 2026-6pm CDT May 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