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.

Overcast

48°F

9°C

Humidity 41%
Wind Speed Calm
Barometer 29.68 in (1006.4 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 14 Jan 8:56 am EST
Extended Forecast for

Derwood MD

  • Today

    Today: A chance of rain, mainly before 10am. Cloudy, with a high near 52. South wind 5 to 7 mph. Chance of precipitation is 30%.

    High: 52 °F

    Chance Rain
    then Cloudy

  • Tonight

    Tonight: Rain likely before 3am, then a slight chance of snow between 3am and 4am. Cloudy, with a low around 24. Blustery, with a west wind 7 to 12 mph becoming northwest 15 to 20 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 24 °F

    Chance Rain
    then
    Rain/Snow
    Likely and
    Blustery

  • Thursday

    Thursday: Mostly sunny, with a high near 29. West wind 16 to 18 mph, with gusts as high as 31 mph.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 19. West wind 10 to 15 mph, with gusts as high as 28 mph.

    Low: 19 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 35. South wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 35 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of rain and snow before 1pm. Partly sunny, with a high near 43. Chance of precipitation is 30%.

    High: 43 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

Detailed Forecast

Today
A chance of rain, mainly before 10am. Cloudy, with a high near 52. South wind 5 to 7 mph. Chance of precipitation is 30%.
Tonight
Rain likely before 3am, then a slight chance of snow between 3am and 4am. Cloudy, with a low around 24. Blustery, with a west wind 7 to 12 mph becoming northwest 15 to 20 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
Mostly sunny, with a high near 29. West wind 16 to 18 mph, with gusts as high as 31 mph.
Thursday Night
Mostly clear, with a low around 19. West wind 10 to 15 mph, with gusts as high as 28 mph.
Friday
Mostly sunny, with a high near 35. South wind 7 to 11 mph, with gusts as high as 21 mph.
Friday Night
Partly cloudy, with a low around 29.
Saturday
A chance of rain and snow before 1pm. Partly sunny, with a high near 43. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
Partly sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 19.
M.L.King Day
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 17.
Tuesday
Mostly sunny, with a high near 28.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Derwood MD
 39.12°N 77.13°W (Elev. 348 ft)
Last Update:
6:53 am EST Jan 14, 2026
Forecast Valid:
9am EST Jan 14, 2026-6pm EST Jan 20, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation