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

40°F

4°C

Humidity 28%
Wind Speed S 10 mph
Barometer 30.32 in (1028.9 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 18 Mar 5:56 pm EDT
Extended Forecast for

Gaithersburg MD

  • Tonight

    Tonight: Increasing clouds, with a low around 30. Southeast wind 3 to 5 mph.

    Low: 30 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 53. South wind around 6 mph.

    High: 53 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers after 2pm. Partly sunny, with a high near 62. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 20%.

    High: 62 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 49. South wind around 7 mph. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers before 8am. Partly sunny, with a high near 67. Chance of precipitation is 30%.

    High: 67 °F

    Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of rain after 8pm. Mostly cloudy, with a low around 45. Chance of precipitation is 40%.

    Low: 45 °F

    Chance Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 30. Southeast wind 3 to 5 mph.
Thursday
Partly sunny, with a high near 53. South wind around 6 mph.
Thursday Night
Partly cloudy, with a low around 38. Calm wind.
Friday
A slight chance of showers after 2pm. Partly sunny, with a high near 62. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 49. South wind around 7 mph. Chance of precipitation is 70%.
Saturday
A chance of showers before 8am. Partly sunny, with a high near 67. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 47.
Sunday
Partly sunny, with a high near 71.
Sunday Night
A chance of rain after 8pm. Mostly cloudy, with a low around 45. Chance of precipitation is 40%.
Monday
Partly sunny, with a high near 54.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Partly sunny, with a high near 57.
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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:
4:53 pm EDT Mar 18, 2026
Forecast Valid:
6pm EDT Mar 18, 2026-6pm EDT Mar 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