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

Areas of Excessive Rainfall and Severe Thunderstorms; Typhoon Watch for Guam/CNMI

Heavy to excessive rainfall will continue today from the Texas Big Bend region into southern Oklahoma. Locally considerable flash and urban flooding is possible, and river flooding will continue in central Oklahoma. Scattered severe thunderstorms are possible in parts of the Mid-Atlantic Friday. A Typhoon Watch has been issued for Guam and CNMI. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

61°F

16°C

Humidity 81%
Wind Speed Vrbl 6 mph
Barometer 30.20 in (1023.8 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 15 Oct 1:56 pm EDT
Extended Forecast for

Potomac MD

  • This Afternoon

    This Afternoon: Showers likely, mainly before 3pm. Cloudy, with a high near 65. East wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 65 °F

    Showers
    Likely

  • Tonight

    Tonight: A chance of showers, mainly before 2am. Patchy fog after 5am. Otherwise, cloudy, with a low around 58. Southeast wind 3 to 6 mph. Chance of precipitation is 50%.

    Low: 58 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A slight chance of showers before 8am, then a chance of showers and thunderstorms after 5pm. Patchy fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 81. South wind 9 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 81 °F

    Patchy Fog
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms before 4am, then a chance of showers. Low around 48. Northwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 54. North wind around 16 mph, with gusts as high as 28 mph.

    High: 54 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

This Afternoon
Showers likely, mainly before 3pm. Cloudy, with a high near 65. East wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A chance of showers, mainly before 2am. Patchy fog after 5am. Otherwise, cloudy, with a low around 58. Southeast wind 3 to 6 mph. Chance of precipitation is 50%.
Friday
A slight chance of showers before 8am, then a chance of showers and thunderstorms after 5pm. Patchy fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 81. South wind 9 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Friday Night
Showers and thunderstorms before 4am, then a chance of showers. Low around 48. Northwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Partly sunny, with a high near 54. North wind around 16 mph, with gusts as high as 28 mph.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 39.
Monday
Sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 47.
Wednesday
Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Potomac MD
 39.02°N 77.2°W (Elev. 381 ft)
Last Update:
2:24 pm EDT Oct 15, 2026
Forecast Valid:
2pm EDT Oct 15, 2026-6pm EDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation