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

68°F

20°C

Humidity 36%
Wind Speed S 13 G 17 mph
Barometer 29.94 in (1015.1 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 20 Mar 1:56 pm EDT
Extended Forecast for

2 Miles SW Potomac MD

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 71. Southwest wind around 14 mph, with gusts as high as 25 mph.

    High: 71 °F

    Mostly Cloudy

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then isolated showers between 2am and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 49. Southwest wind 5 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Showers
    Likely

  • Saturday

    Saturday: Mostly sunny, with a high near 64. North wind around 7 mph.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 48. Light and variable wind becoming southeast around 5 mph after midnight.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 79. Southwest wind 6 to 8 mph.

    High: 79 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.

    Low: 53 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: Showers likely before 8am. Partly sunny, with a high near 60. Chance of precipitation is 60%.

    High: 60 °F

    Showers
    Likely then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 35.

    Low: 35 °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 71. Southwest wind around 14 mph, with gusts as high as 25 mph.
Tonight
Showers and thunderstorms likely before 2am, then isolated showers between 2am and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 49. Southwest wind 5 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Mostly sunny, with a high near 64. North wind around 7 mph.
Saturday Night
Partly cloudy, with a low around 48. Light and variable wind becoming southeast around 5 mph after midnight.
Sunday
Partly sunny, with a high near 79. Southwest wind 6 to 8 mph.
Sunday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Monday
Showers likely before 8am. Partly sunny, with a high near 60. Chance of precipitation is 60%.
Monday Night
Mostly clear, with a low around 35.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Mostly cloudy, with a high near 55.
Wednesday Night
Mostly cloudy, with a low around 37.
Thursday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Potomac MD
 39°N 77.24°W (Elev. 318 ft)
Last Update:
2:23 pm EDT Mar 20, 2026
Forecast Valid:
2pm EDT Mar 20, 2026-6pm EDT Mar 26, 2026
 
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