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.

Fog/Mist

26°F

-3°C

Humidity 100%
Wind Speed Calm
Barometer 30.10 in (1021.2 mb)
Dewpoint 26°F (-3°C)
Visibility 5.00 mi
Last update 8 Dec 1:56 am EST
Extended Forecast for

Rossmoor MD

  • Overnight

    Overnight: Cloudy, with a low around 27. North wind 6 to 8 mph.

    Low: 27 °F

    Cloudy

  • Monday

    Monday: A chance of snow before noon, then a slight chance of snow after 1pm. Cloudy, with a high near 30. Northeast wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 30 °F

    Chance Snow

  • Monday Night

    Monday Night: Cloudy during the early evening, then gradual clearing, with a low around 17. Northeast wind around 6 mph becoming calm in the evening.

    Low: 17 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34. Calm wind becoming south 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29. South wind around 8 mph.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain, mainly after 1pm. Mostly cloudy, with a high near 46. Chance of precipitation is 30%.

    High: 46 °F

    Chance Rain

  • Wednesday Night

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

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 27. North wind 6 to 8 mph.
Monday
A chance of snow before noon, then a slight chance of snow after 1pm. Cloudy, with a high near 30. Northeast wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Monday Night
Cloudy during the early evening, then gradual clearing, with a low around 17. Northeast wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 34. Calm wind becoming south 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 29. South wind around 8 mph.
Wednesday
A chance of rain, mainly after 1pm. Mostly cloudy, with a high near 46. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Mostly sunny, with a high near 40.
Thursday Night
Mostly cloudy, with a low around 26.
Friday
Partly sunny, with a high near 39.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 31.
Saturday Night
Partly cloudy, with a low around 18.
Sunday
Mostly sunny, with a high near 30.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rossmoor MD
 39.09°N 77.08°W (Elev. 440 ft)
Last Update:
12:53 am EST Dec 8, 2025
Forecast Valid:
1am EST Dec 8, 2025-6pm EST Dec 14, 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