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.

Fair

67°F

19°C

Humidity 35%
Wind Speed SW 9 mph
Barometer 29.99 in (1016.7 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 20 Mar 12:56 pm EDT
Extended Forecast for

3 Miles W North Potomac MD

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 69. Southwest wind 13 to 15 mph, with gusts as high as 25 mph.

    High: 69 °F

    Mostly Cloudy

  • Tonight

    Tonight: Showers likely, mainly before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 48. Southwest wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 62. North wind around 8 mph.

    High: 62 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45. Light and variable wind becoming southeast around 5 mph after midnight.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 76. Southwest wind 6 to 10 mph.

    High: 76 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of rain, mainly after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.

    Low: 52 °F

    Slight Chance
    Rain then
    Chance Rain

  • Monday

    Monday: A chance of rain before 2pm. Partly sunny, with a high near 60. Chance of precipitation is 30%.

    High: 60 °F

    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 69. Southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Tonight
Showers likely, mainly before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 48. Southwest wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 62. North wind around 8 mph.
Saturday Night
Partly cloudy, with a low around 45. Light and variable wind becoming southeast around 5 mph after midnight.
Sunday
Partly sunny, with a high near 76. Southwest wind 6 to 10 mph.
Sunday Night
A chance of rain, mainly after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
Monday
A chance of rain before 2pm. Partly sunny, with a high near 60. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 31.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly cloudy, with a high near 55.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
Partly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W North Potomac MD
 39.1°N 77.31°W (Elev. 348 ft)
Last Update:
10:53 am EDT Mar 20, 2026
Forecast Valid:
1pm EDT Mar 20, 2026-6pm EDT Mar 26, 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