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

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

28°F

-2°C

Humidity 96%
Wind Speed N 3 mph
Barometer 30.07 in (1020.2 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 5 Dec 4:56 pm EST
Extended Forecast for

Derwood MD

Winter Weather Advisory December 5, 07:00pm until December 6, 01:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: Freezing rain, mainly between 7pm and 1am. Patchy fog. Low around 26. Calm wind. Chance of precipitation is 80%. Total nighttime ice accumulation of less than a 0.1 of an inch possible.

    Low: 26 °F

    Freezing Rain
    and Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 42. Calm wind becoming southwest around 5 mph.

    High: 42 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 42. Calm wind becoming south around 5 mph.

    High: 42 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 25. Calm wind becoming northwest 5 to 8 mph after midnight.

    Low: 25 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Freezing rain, mainly between 7pm and 1am. Patchy fog. Low around 26. Calm wind. Chance of precipitation is 80%. Total nighttime ice accumulation of less than a 0.1 of an inch possible.
Saturday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 42. Calm wind becoming southwest around 5 mph.
Saturday Night
Partly cloudy, with a low around 25. Calm wind.
Sunday
Partly sunny, with a high near 42. Calm wind becoming south around 5 mph.
Sunday Night
Mostly cloudy, with a low around 25. Calm wind becoming northwest 5 to 8 mph after midnight.
Monday
Partly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Mostly cloudy, with a high near 46.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 44.
Thursday Night
Partly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Derwood MD
 39.12°N 77.13°W (Elev. 348 ft)
Last Update:
3:53 pm EST Dec 5, 2025
Forecast Valid:
5pm EST Dec 5, 2025-6pm EST Dec 12, 2025
 
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