Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

83°F

28°C

Humidity 40%
Wind Speed SE 3 mph
Barometer 29.91 in (1013.9 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 15 Apr 7:56 pm EDT
Extended Forecast for

Potomac MD

  • Tonight

    Tonight: Partly cloudy, with a low around 69. Southwest wind 3 to 7 mph.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 91. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 91 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers.  Mostly cloudy, with a low around 68. Southwest wind 6 to 8 mph becoming west after midnight.  Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers.  Partly sunny, with a high near 82. Northwest wind 6 to 8 mph.  Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. North wind around 5 mph becoming calm  in the evening.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers.  Mostly cloudy, with a low around 53. Chance of precipitation is 50%.

    Low: 53 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly before 2pm.  Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers before 8pm.  Partly cloudy, with a low around 40. Chance of precipitation is 30%.

    Low: 40 °F

    Chance
    Showers then
    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 69. Southwest wind 3 to 7 mph.
Thursday
Mostly sunny, with a high near 91. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 68. Southwest wind 6 to 8 mph becoming west after midnight. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 82. Northwest wind 6 to 8 mph. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 61. North wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.
Sunday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Sunday Night
A chance of showers before 8pm. Partly cloudy, with a low around 40. Chance of precipitation is 30%.
Monday
Sunny, with a high near 56.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Sunny, with a high near 68.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Potomac MD
 39.02°N 77.2°W (Elev. 381 ft)
7:53 pm EDT Apr 15, 2026
8pm EDT Apr 15, 2026-6pm EDT Apr 22, 2026
 
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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