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

Washington Regional Airport (KFYG)

Lat: 38.59°NLon: 90.99°WElev: 489ft.

Fair

86°F

30°C

Humidity 66%
Wind Speed SE 6 mph
Barometer 29.86 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 13 Oct 6:55 pm CDT
Extended Forecast for

Marthasville MO

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 68. Calm wind becoming south 5 to 7 mph in the evening. Chance of precipitation is 70%.

    Low: 68 °F

    Clear then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. Patchy fog between 8am and 10am. High near 77. Light and variable wind becoming north around 6 mph in the afternoon. Chance of precipitation is 90%.

    High: 77 °F

    Showers and
    Patchy Fog
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Patchy fog between 1am and 2am. Otherwise, cloudy, with a low around 65. East wind 5 to 7 mph. Chance of precipitation is 70%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Showers
    Likely and
    Patchy Fog

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 81. East wind 5 to 7 mph becoming calm. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 46. Light west wind becoming northwest 5 to 10 mph in the evening. Winds could gust as high as 24 mph. Chance of precipitation is 50%.

    Low: 46 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 68. Calm wind becoming south 5 to 7 mph in the evening. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. Patchy fog between 8am and 10am. High near 77. Light and variable wind becoming north around 6 mph in the afternoon. Chance of precipitation is 90%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Patchy fog between 1am and 2am. Otherwise, cloudy, with a low around 65. East wind 5 to 7 mph. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 81. East wind 5 to 7 mph becoming calm. Chance of precipitation is 90%.
Thursday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 46. Light west wind becoming northwest 5 to 10 mph in the evening. Winds could gust as high as 24 mph. Chance of precipitation is 50%.
Friday
Mostly sunny, with a high near 59.
Friday Night
Mostly clear, with a low around 34.
Saturday
Sunny, with a high near 63.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 49.
Tuesday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Marthasville MO
 38.64°N 91.05°W (Elev. 561 ft)
Last Update:
6:01 pm CDT Oct 13, 2026
Forecast Valid:
6pm CDT Oct 13, 2026-6pm CDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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