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

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Mostly Cloudy

68°F

20°C

Humidity 55%
Wind Speed Calm
Barometer 29.83 in (1011.3 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 16 Jun 8:56 pm EDT
Extended Forecast for

Clarksburg MD

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. South wind 3 to 5 mph.

    Low: 62 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. West wind 3 to 8 mph.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 66. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 18 mph.

    Low: 66 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 91. West wind 14 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Mostly cloudy, with a low around 66. West wind 6 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    Low: 66 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: A chance of showers and thunderstorms before 11am, then a chance of showers between 11am and 2pm. Partly sunny, with a high near 81. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 62. South wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 85. West wind 3 to 8 mph.
Wednesday Night
Mostly cloudy, with a low around 66. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 18 mph.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 91. West wind 14 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.
Thursday Night
A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Mostly cloudy, with a low around 66. West wind 6 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Juneteenth
A chance of showers and thunderstorms before 11am, then a chance of showers between 11am and 2pm. Partly sunny, with a high near 81. Chance of precipitation is 40%.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 83.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clarksburg MD
 39.22°N 77.25°W (Elev. 505 ft)
Last Update:
7:53 pm EDT Jun 16, 2026
Forecast Valid:
9pm EDT Jun 16, 2026-6pm EDT Jun 23, 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