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.

Mostly Cloudy

37°F

3°C

Humidity NA
Wind Speed W 6 mph
Barometer 30.14 in (1022.5 mb)
Dewpoint N/A
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 30 Nov 7:56 pm EST
Extended Forecast for

Derwood MD

  • Tonight

    Tonight: Partly cloudy, with a low around 29. Northwest wind 8 to 13 mph, with gusts as high as 24 mph.

    Low: 29 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 42. Northwest wind 5 to 10 mph becoming light north in the afternoon. Winds could gust as high as 18 mph.

    High: 42 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of snow between 1am and 4am, then rain, snow, and sleet likely. Increasing clouds, with a low around 28. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 70%. New snow and sleet accumulation of less than a half inch possible.

    Low: 28 °F

    Mostly Cloudy
    then Wintry
    Mix Likely

  • Tuesday

    Tuesday: Rain and sleet, possibly mixed with snow, becoming all rain after 10am. High near 37. Southeast wind 5 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 100%. New snow and sleet accumulation of less than a half inch possible.

    High: 37 °F

    Wintry Mix
    then Rain

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 24. Northwest wind 8 to 13 mph.

    Low: 24 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 38.

    High: 38 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 29. Northwest wind 8 to 13 mph, with gusts as high as 24 mph.
Monday
Mostly sunny, with a high near 42. Northwest wind 5 to 10 mph becoming light north in the afternoon. Winds could gust as high as 18 mph.
Monday Night
A chance of snow between 1am and 4am, then rain, snow, and sleet likely. Increasing clouds, with a low around 28. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 70%. New snow and sleet accumulation of less than a half inch possible.
Tuesday
Rain and sleet, possibly mixed with snow, becoming all rain after 10am. High near 37. Southeast wind 5 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 100%. New snow and sleet accumulation of less than a half inch possible.
Tuesday Night
Partly cloudy, with a low around 24. Northwest wind 8 to 13 mph.
Wednesday
Sunny, with a high near 38.
Wednesday Night
Partly cloudy, with a low around 25.
Thursday
Partly sunny, with a high near 41.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Partly sunny, with a high near 33.
Friday Night
A chance of snow. Mostly cloudy, with a low around 26. Chance of precipitation is 50%.
Saturday
A chance of rain. Mostly cloudy, with a high near 40. Chance of precipitation is 30%.
Saturday Night
A chance of rain or freezing rain. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Derwood MD
 39.14°N 77.12°W (Elev. 400 ft)
Last Update:
6:53 pm EST Nov 30, 2025
Forecast Valid:
8pm EST Nov 30, 2025-6pm EST Dec 7, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation