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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Derwood MD

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. South wind around 9 mph, with gusts as high as 20 mph.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of snow before 8am, then a chance of rain. Cloudy, with a high near 44. South wind 11 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 44 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31. West wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 37. West wind around 14 mph, with gusts as high as 25 mph.

    High: 37 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24. West wind 6 to 8 mph.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: A chance of snow, mainly after 1pm. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.

    High: 37 °F

    Chance Snow

  • Friday Night

    Friday Night: A chance of snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.

    Low: 28 °F

    Chance Snow

  • Saturday

    Saturday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow after 1am. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 28. South wind around 9 mph, with gusts as high as 20 mph.
Wednesday
A slight chance of snow before 8am, then a chance of rain. Cloudy, with a high near 44. South wind 11 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
Mostly cloudy, with a low around 31. West wind 9 to 13 mph, with gusts as high as 22 mph.
Thursday
Mostly sunny, with a high near 37. West wind around 14 mph, with gusts as high as 25 mph.
Thursday Night
Partly cloudy, with a low around 24. West wind 6 to 8 mph.
Friday
A chance of snow, mainly after 1pm. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.
Friday Night
A chance of snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 42.
Saturday Night
A chance of snow after 1am. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 36.
Sunday Night
Mostly clear, with a low around 16.
Monday
Mostly sunny, with a high near 32.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 35.
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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:
9:53 pm EST Dec 9, 2025
Forecast Valid:
10pm EST Dec 9, 2025-6pm EST Dec 16, 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