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

75°F

24°C

Humidity NA
Wind Speed Calm
Barometer 30.06 in (1018.9 mb)
Dewpoint N/A
Visibility 10.00 mi
Last update 16 Jul 3:56 am EDT
Extended Forecast for

2 Miles NNW Potomac MD

  • Today

    Today: A chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 91. Heat index values as high as 100. South wind 3 to 8 mph. Chance of precipitation is 30%.

    High: 91 °F

    Partly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 9pm. Mostly cloudy, with a low around 75. Southwest wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 75 °F

    T-storms
    Likely then
    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Heat index values as high as 102. West wind around 9 mph. Chance of precipitation is 30%.

    High: 95 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Southwest wind 3 to 6 mph. Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Northwest wind around 7 mph. Chance of precipitation is 40%.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 50%.

    High: 87 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 40%.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 88. Chance of precipitation is 70%.

    High: 88 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
A chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 91. Heat index values as high as 100. South wind 3 to 8 mph. Chance of precipitation is 30%.
Tonight
Showers and thunderstorms likely, mainly before 9pm. Mostly cloudy, with a low around 75. Southwest wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Heat index values as high as 102. West wind around 9 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Southwest wind 3 to 6 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Northwest wind around 7 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 40%.
Sunday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 88. Chance of precipitation is 70%.
Sunday 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 71. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Potomac MD
 39.04°N 77.2°W (Elev. 397 ft)
Last Update:
1:30 am EDT Jul 16, 2025
Forecast Valid:
4am EDT Jul 16, 2025-6pm EDT Jul 22, 2025
 
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