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.

A Few Clouds

82°F

28°C

Humidity 88%
Wind Speed Calm
Barometer 30.14 in (1021.2 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 15 Aug 9:56 am EDT
Extended Forecast for

Rockville MD

  • Today

    Today: Isolated showers between 1pm and 2pm, then scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. East wind around 6 mph. Chance of precipitation is 40%.

    High: 88 °F

    Mostly Sunny
    then
    Scattered
    T-storms

  • Tonight

    Tonight: Isolated showers and thunderstorms before 9pm. Increasing clouds, with a low around 71. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 71 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 86. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 86 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70. Light southeast wind.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 92. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 92 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 71. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny

Detailed Forecast

Today
Isolated showers between 1pm and 2pm, then scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. East wind around 6 mph. Chance of precipitation is 40%.
Tonight
Isolated showers and thunderstorms before 9pm. Increasing clouds, with a low around 71. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
A slight chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 86. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 70. Light southeast wind.
Sunday
Mostly sunny, with a high near 92. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Partly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Rockville MD
 39.08°N 77.16°W (Elev. 430 ft)
Last Update:
7:29 am EDT Aug 15, 2025
Forecast Valid:
10am EDT Aug 15, 2025-6pm EDT Aug 21, 2025
 
Forecast Discussion
 
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Additional Resources

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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