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 with Haze

45°F

7°C

Humidity NA
Wind Speed W 5 mph
Barometer 29.84 in (1012.0 mb)
Dewpoint N/A
Visibility 4.00 mi
Wind Chill42°F (6°C)
Last update 11 Jan 1:56 am EST
Extended Forecast for

Potomac MD

  • Overnight

    Overnight: Cloudy, with a low around 37. Light west wind becoming northwest 9 to 14 mph. Winds could gust as high as 31 mph.

    Low: 37 °F

    Cloudy

  • Sunday

    Sunday: A chance of rain and snow showers between noon and 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 46. Breezy, with a west wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 50%.

    High: 46 °F

    Mostly Sunny
    then Chance
    Rain/Snow and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 28. Northwest wind 10 to 17 mph, with gusts as high as 38 mph.

    Low: 28 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 45. West wind 6 to 8 mph becoming southwest in the afternoon.

    High: 45 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm in the evening.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 52.

    High: 52 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: A chance of rain after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Overnight
Cloudy, with a low around 37. Light west wind becoming northwest 9 to 14 mph. Winds could gust as high as 31 mph.
Sunday
A chance of rain and snow showers between noon and 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 46. Breezy, with a west wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 50%.
Sunday Night
Mostly clear, with a low around 28. Northwest wind 10 to 17 mph, with gusts as high as 38 mph.
Monday
Sunny, with a high near 45. West wind 6 to 8 mph becoming southwest in the afternoon.
Monday Night
Partly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 49.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Cloudy, with a high near 52.
Wednesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.
Thursday
A chance of rain before 1pm. Partly sunny, with a high near 39. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Potomac MD
 39.02°N 77.18°W (Elev. 249 ft)
Last Update:
12:53 am EST Jan 11, 2026
Forecast Valid:
2am EST Jan 11, 2026-6pm EST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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