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

Flooding Possible in the Southwest U.S.; Coastal Storm to Impact the East

Heavy to excessive rainfall is expected today into Wednesday over New Mexico into far west Texas. Flash flooding and debris flows in wildfire burn areas will be possible. A strong coastal storm will develop off the Mid-Atlantic coast Wednesday, intensifying toward southern New England this weekend. Significant coastal flooding, strong rip currents, and beach erosion from high surf expected. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Light Rain

57°F

14°C

Humidity NA
Wind Speed Vrbl 6 mph
Barometer 30.28 in (1026.7 mb)
Dewpoint N/A
Visibility 10.00 mi
Last update 22 Sep 7:56 pm EDT
Extended Forecast for

Clarksville MD

  • Tonight

    Tonight: Rain with patchy drizzle, mainly before 5am, then patchy drizzle after 5am. Patchy fog before 2am. Low around 52. Northeast wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of rain between 11am and 2pm. Cloudy, with a high near 63. Northeast wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 63 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 50. Northeast wind around 9 mph, with gusts as high as 23 mph.

    Low: 50 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 63. Northeast wind around 11 mph, with gusts as high as 22 mph.

    High: 63 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48. North wind 5 to 8 mph.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers after 2pm. Mostly sunny, with a high near 68. Chance of precipitation is 20%.

    High: 68 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 20%.

    Low: 52 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Rain with patchy drizzle, mainly before 5am, then patchy drizzle after 5am. Patchy fog before 2am. Low around 52. Northeast wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A chance of rain between 11am and 2pm. Cloudy, with a high near 63. Northeast wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 50. Northeast wind around 9 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 63. Northeast wind around 11 mph, with gusts as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 48. North wind 5 to 8 mph.
Friday
Mostly sunny, with a high near 67.
Friday Night
Partly cloudy, with a low around 51.
Saturday
A slight chance of showers after 2pm. Mostly sunny, with a high near 68. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Partly sunny, with a high near 69. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 53.
Monday
Mostly sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
Mostly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clarksville MD
 39.21°N 76.94°W (Elev. 449 ft)
Last Update:
7:53 pm EDT Sep 22, 2026
Forecast Valid:
8pm EDT Sep 22, 2026-6pm EDT Sep 29, 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