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

80°F

27°C

Humidity 51%
Wind Speed Calm
Barometer 30.18 in (1022.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 24 Jul 3:56 pm EDT
Extended Forecast for

4 Miles WSW North Potomac MD

  • Tonight

    Tonight: Mostly cloudy, with a low around 65. East wind 5 to 7 mph becoming calm after midnight.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64. Light and variable wind.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Light and variable wind. Chance of precipitation is 30%.

    High: 86 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Sunday Night

    Sunday Night: Scattered showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.

    Low: 67 °F

    Scattered
    Showers then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 88. Chance of precipitation is 20%.

    High: 88 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.

    Low: 70 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 87. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely then
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, with a low around 65. East wind 5 to 7 mph becoming calm after midnight.
Saturday
Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 64. Light and variable wind.
Sunday
Scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Light and variable wind. Chance of precipitation is 30%.
Sunday Night
Scattered showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.
Monday
A slight chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 88. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 87. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Wednesday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
A slight chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 67.
Friday
A slight chance of showers. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW North Potomac MD
 39.07°N 77.31°W (Elev. 397 ft)
Last Update:
2:23 pm EDT Jul 24, 2026
Forecast Valid:
4pm EDT Jul 24, 2026-6pm EDT Jul 31, 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