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.

Overcast

55°F

13°C

Humidity NA
Wind Speed Vrbl 3 mph
Barometer 30.35 in (1029.0 mb)
Dewpoint N/A
Visibility 10.00 mi
Last update 23 Sep 5:56 am EDT
Extended Forecast for

Derwood MD

  • Today

    Today: A chance of showers, mainly before 9am. Cloudy, with a high near 62. Northeast wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 62 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. Northeast wind 7 to 9 mph, with gusts as high as 22 mph.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 64. Northeast wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 64 °F

    Partly 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. North wind 11 to 14 mph, with gusts as high as 25 mph.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 53. Chance of precipitation is 20%.

    Low: 53 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers. Mostly sunny, with a high near 69. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    Showers

Detailed Forecast

Today
A chance of showers, mainly before 9am. Cloudy, with a high near 62. Northeast wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Tonight
Mostly cloudy, with a low around 51. Northeast wind 7 to 9 mph, with gusts as high as 22 mph.
Thursday
Partly sunny, with a high near 64. Northeast wind 10 to 13 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. North wind 11 to 14 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 70.
Saturday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 53. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Mostly 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 72.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
Sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Derwood MD
 39.15°N 77.15°W (Elev. 476 ft)
Last Update:
4:53 am EDT Sep 23, 2026
Forecast Valid:
6am EDT Sep 23, 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