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

72°F

22°C

Humidity 82%
Wind Speed Vrbl 3 mph
Barometer 29.97 in (1016.0 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 19 Aug 8:56 am EDT
Extended Forecast for

Gaithersburg MD

  • Today

    Today: Sunny, with a high near 87. Calm wind becoming west around 5 mph in the afternoon.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Increasing clouds, with a high near 82. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 64. Light north wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 81. North wind around 5 mph becoming east in the afternoon. Chance of precipitation is 20%.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.

    Low: 66 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 50%.

    High: 82 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 87. Calm wind becoming west around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 69. Calm wind.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Increasing clouds, with a high near 82. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 64. Light north wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 81. North wind around 5 mph becoming east in the afternoon. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Saturday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
Sunday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 64.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 63.
Tuesday
Sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Gaithersburg MD
 39.15°N 77.21°W (Elev. 443 ft)
Last Update:
7:53 am EDT Aug 19, 2026
Forecast Valid:
9am EDT Aug 19, 2026-6pm EDT Aug 25, 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