Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

75°F

24°C

Humidity 100%
Wind Speed Calm
Barometer 29.91 in (1013.5 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 4 Sep 8:56 pm EDT
Extended Forecast for

Clarksburg MD

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers after 4am.  Mostly cloudy, with a low around 69. Light northwest wind.  Chance of precipitation is 20%.

    Low: 69 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 2pm.  Mostly cloudy, with a high near 80. North wind 3 to 5 mph.  Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly before 7pm.  Partly cloudy, with a low around 62. North wind 3 to 5 mph.  Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 78. Northeast wind around 7 mph.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59. Light east wind.

    Low: 59 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers after 4am. Mostly cloudy, with a low around 69. Light northwest wind. Chance of precipitation is 20%.
Saturday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 80. North wind 3 to 5 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 62. North wind 3 to 5 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 78. Northeast wind around 7 mph.
Sunday Night
Partly cloudy, with a low around 59. Light east wind.
Labor Day
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 63. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Clarksburg MD
 39.25°N 77.28°W (Elev. 646 ft)
7:53 pm EDT Sep 4, 2026
9pm EDT Sep 4, 2026-6pm EDT Sep 11, 2026
 
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