National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tropical Moisture Will Bring Heavy to Excessive Rainfall with Possible Flooding This Week

Tropical moisture will surge over the southwest into the central U.S. this week with several days of heavy to excessive rainfall which may bring limited to considerable flooding. Isolated severe thunderstorm gusts and a couple of tornadoes will be possible from southeast New Mexico into west Texas. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Mostly Cloudy

59°F

15°C

Humidity 100%
Wind Speed Calm
Barometer 30.01 in (1017.5 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 29 Sep 3:56 am EDT
Extended Forecast for

2 Miles SSW North Potomac MDSimilar City Names

  • Today

    Today: Mostly cloudy, with a high near 73. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 73 °F

    Mostly Cloudy

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 80. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 80 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61. South wind 3 to 5 mph.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 20%.

    Low: 61 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.

    High: 72 °F

    Slight Chance
    Showers then
    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, with a high near 73. Calm wind becoming northwest around 5 mph in the afternoon.
Tonight
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 57. Calm wind.
Wednesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 80. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 61. South wind 3 to 5 mph.
Thursday
Sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 62.
Friday
Mostly sunny, with a high near 86.
Friday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 20%.
Saturday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
Saturday Night
Showers likely, mainly after 8pm. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Sunday
Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.
Monday
A slight chance of showers. Partly sunny, with a high near 66. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW North Potomac MDSimilar City Names
 39.07°N 77.25°W (Elev. 299 ft)
Last Update:
2:23 am EDT Sep 29, 2026
Forecast Valid:
4am EDT Sep 29, 2026-6pm EDT Oct 5, 2026
 
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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