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

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

79°F

26°C

Humidity 82%
Wind Speed Vrbl 5 mph
Barometer 29.99 in (1016.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 20 Aug 10:56 am EDT
Extended Forecast for

Washington Grove MD

  • Today

    Today: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 83. Light and variable wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 83 °F

    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 9pm. Patchy fog between 10pm and 2am. Otherwise, mostly cloudy, with a low around 65. North wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Showers
    Likely and
    Patchy Fog
    then Patchy
    Fog

  • Friday

    Friday: Mostly sunny, with a high near 79. North wind around 5 mph becoming light and variable in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Increasing clouds, with a low around 67. Light east wind. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Cloudy, with a high near 81. Light east wind. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 30%.

    High: 81 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 63. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 83. Light and variable wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms likely, mainly before 9pm. Patchy fog between 10pm and 2am. Otherwise, mostly cloudy, with a low around 65. North wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly sunny, with a high near 79. North wind around 5 mph becoming light and variable in the afternoon.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Increasing clouds, with a low around 67. Light east wind. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Cloudy, with a high near 81. Light east wind. Chance of precipitation is 60%.
Saturday Night
Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 63. Chance of precipitation is 30%.
Monday
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Washington Grove MD
 39.13°N 77.18°W (Elev. 459 ft)
Last Update:
10:53 am EDT Aug 20, 2026
Forecast Valid:
11am EDT Aug 20, 2026-6pm EDT Aug 26, 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