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. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

81°F

27°C

Humidity 47%
Wind Speed S 13 G 20 mph
Barometer 29.83 in (1009.7 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 15 May 3:53 pm CDT
Extended Forecast for

5 Miles SW Smithton IL

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 66. South wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly between 7am and noon. Mostly cloudy, with a high near 83. Southwest wind 6 to 9 mph. Chance of precipitation is 60%.

    High: 83 °F

    T-storms
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 64. Southeast wind 6 to 8 mph.

    Low: 64 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89. South wind 9 to 17 mph, with gusts as high as 25 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 68. South wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 68 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. Breezy.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms and
    Breezy

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.

    High: 82 °F

    Showers
    Likely then
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

    Low: 60 °F

    Showers
    Likely

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 66. South wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Saturday
Showers and thunderstorms likely, mainly between 7am and noon. Mostly cloudy, with a high near 83. Southwest wind 6 to 9 mph. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 64. Southeast wind 6 to 8 mph.
Sunday
Sunny, with a high near 89. South wind 9 to 17 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 68. South wind 11 to 14 mph, with gusts as high as 22 mph.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. Breezy.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Tuesday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 72.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 54.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 55.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
1:25 pm CDT May 15, 2026
Forecast Valid:
4pm CDT May 15, 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