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

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

21°F

-6°C

Humidity 68%
Wind Speed Calm
Barometer 29.98 in (1017.3 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Last update 3 Jan 5:56 am EST
Extended Forecast for

Derwood MD

  • Today

    Today: Mostly cloudy, with a high near 34. North wind around 5 mph becoming calm in the afternoon.

    High: 34 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of snow before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 25. Calm wind. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 38. Light northwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 38 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 23. Northwest wind around 6 mph becoming calm in the evening.

    Low: 23 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy, with a high near 38. Calm wind becoming south 5 to 8 mph in the morning.

    High: 38 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 49.

    High: 49 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 34. North wind around 5 mph becoming calm in the afternoon.
Tonight
A slight chance of snow before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 25. Calm wind. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 38. Light northwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Sunday Night
Increasing clouds, with a low around 23. Northwest wind around 6 mph becoming calm in the evening.
Monday
Mostly cloudy, with a high near 38. Calm wind becoming south 5 to 8 mph in the morning.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly cloudy, with a high near 49.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
Mostly cloudy, with a high near 52.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 44. Chance of precipitation is 30%.
Friday
A chance of rain. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
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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:
3:53 am EST Jan 3, 2026
Forecast Valid:
6am EST Jan 3, 2026-6pm EST Jan 9, 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