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

Washington Regional Airport (KFYG)

Lat: 38.59°NLon: 90.99°WElev: 489ft.

Fair with Haze

72°F

22°C

Humidity 88%
Wind Speed SE 6 mph
Barometer 29.85 in
Dewpoint 68°F (20°C)
Visibility 4.00 mi
Last update 17 May 1:55 am CDT
Extended Forecast for

4 Miles SW Marthasville MO

  • Overnight

    Overnight: Mostly cloudy, with a low around 67. Southeast wind around 5 mph.

    Low: 67 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 90. South wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 90 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 68. South wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Increasing clouds, with a high near 88. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 88 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 67. South wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    Low: 67 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 90%.

    High: 84 °F

    Showers
    Likely then
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.

    Low: 54 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 69.

    High: 69 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 67. Southeast wind around 5 mph.
Sunday
Mostly sunny, with a high near 90. South wind 7 to 15 mph, with gusts as high as 24 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 68. South wind 9 to 11 mph, with gusts as high as 21 mph.
Monday
A chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Increasing clouds, with a high near 88. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Monday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 67. South wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Tuesday
Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 90%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Wednesday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 69.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
Partly sunny, with a high near 72.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 52.
Friday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 76.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 55.
Saturday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Marthasville MO
 38.58°N 91.11°W (Elev. 577 ft)
Last Update:
1:26 am CDT May 17, 2026
Forecast Valid:
2am CDT May 17, 2026-6pm CDT May 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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