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

Hazardous Weather Conditions

Current conditions at

Washington Regional Airport (KFYG)

Lat: 38.59°NLon: 90.99°WElev: 489ft.

Fair

70°F

21°C

Humidity 94%
Wind Speed Calm
Barometer 30.19 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 6 Aug 3:15 am CDT
Extended Forecast for

Marthasville MO

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, sunny, with a high near 91. Light southeast wind.

    High: 91 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69. Light southeast wind.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.

    High: 92 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 71. Light southeast wind.

    Low: 71 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 65. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, sunny, with a high near 91. Light southeast wind.
Wednesday Night
Mostly clear, with a low around 69. Light southeast wind.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 71. Light southeast wind.
Friday
Sunny, with a high near 93.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 93.
Saturday Night
Partly cloudy, with a low around 73.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 72.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marthasville MO
 38.64°N 91.05°W (Elev. 561 ft)
Last Update:
3:11 am CDT Aug 6, 2025
Forecast Valid:
3am CDT Aug 6, 2025-6pm CDT Aug 12, 2025
 
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