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

68°F

20°C

Humidity 76%
Wind Speed SE 5 mph
Barometer 29.77 in (1007.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 16 May 12:54 am CDT
Extended Forecast for

5 Miles WNW Dow IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 68. South wind around 7 mph.

    Low: 68 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. High near 82. South wind 7 to 9 mph. Chance of precipitation is 80%.

    High: 82 °F

    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms, mainly between 8pm and 9pm. Partly cloudy, with a low around 63. Southeast wind around 8 mph.

    Low: 63 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 88. South wind 10 to 16 mph, with gusts as high as 29 mph.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 69 °F

    Mostly Clear

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89.

    High: 89 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Monday Night

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

    Low: 68 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 70%.

    High: 80 °F

    Chance
    T-storms then
    Showers
    Likely

  • 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 60%.

    Low: 57 °F

    Showers
    Likely

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 68. South wind around 7 mph.
Saturday
Showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. High near 82. South wind 7 to 9 mph. Chance of precipitation is 80%.
Saturday Night
A 20 percent chance of showers and thunderstorms, mainly between 8pm and 9pm. Partly cloudy, with a low around 63. Southeast wind around 8 mph.
Sunday
Sunny, with a high near 88. South wind 10 to 16 mph, with gusts as high as 29 mph.
Sunday Night
Mostly clear, with a low around 69. South wind around 15 mph, with gusts as high as 25 mph.
Monday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 70%.
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 60%.
Wednesday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 70.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 52.
Thursday
Mostly sunny, with a high near 72.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 54.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Dow IL
 39.07°N 90.41°W (Elev. 548 ft)
Last Update:
12:46 am CDT May 16, 2026
Forecast Valid:
1am 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