Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

Current conditions at

Washington Regional Airport (KFYG)

Lat: 38.59°NLon: 90.99°WElev: 489ft.

Fair

75°F

24°C

Humidity 89%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 4 Aug 10:55 pm CDT
Extended Forecast for

4 Miles SW Marthasville MO

  • Tonight

    Tonight: Mostly clear, with a low around 68. Light south wind.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 5pm.  Partly sunny, then gradually becoming sunny, with a high near 90. South wind 3 to 8 mph.

    High: 90 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly after 4am.  Cloudy, then gradually becoming partly cloudy, with a low around 69. Southeast wind around 6 mph becoming calm  after midnight.  Chance of precipitation is 60%.

    Low: 69 °F

    T-storms
    Likely

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 10am.  High near 84. Calm wind.  Chance of precipitation is 80%.

    High: 84 °F

    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms.  Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 68. Light south wind.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, then gradually becoming sunny, with a high near 90. South wind 3 to 8 mph.
Wednesday Night
Showers and thunderstorms likely, mainly after 4am. Cloudy, then gradually becoming partly cloudy, with a low around 69. Southeast wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%.
Thursday
Showers and thunderstorms, mainly before 10am. High near 84. Calm wind. Chance of precipitation is 80%.
Thursday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69. Calm wind.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 68.
Saturday
Sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 71.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Marthasville MO
 38.58°N 91.11°W (Elev. 577 ft)
9:41 pm CDT Aug 4, 2026
11pm CDT Aug 4, 2026-6pm CDT Aug 11, 2026
 
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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