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

Widespread Rain from Texas to the Central Appalachians; Heavy to Excessive Rainfall in Southern California and the Southwest

Scattered thunderstorms and widespread showers are expected from the Texas coast to the central Appalachians today. Heavy to excessive rainfall will continue in southern California into the Desert Southwest through Saturday. Heavy rain will pose a risk of flash flooding, especially across burn scar and urbanized regions. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

53°F

12°C

Humidity 86%
Wind Speed Calm
Barometer 30.03 in (1018.2 mb)
Dewpoint 49°F (9°C)
Visibility 9.00 mi
Last update 21 Nov 12:56 pm EST
Extended Forecast for

2 Miles NNW Potomac MD

  • This Afternoon

    This Afternoon: Cloudy, with a high near 56. Calm wind.

    High: 56 °F

    Cloudy

  • Tonight

    Tonight: Rain, mainly after 11pm. Low around 48. Calm wind. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Rain Likely
    then Rain

  • Saturday

    Saturday: A chance of showers, mainly before 10am. Cloudy through mid morning, then gradual clearing, with a high near 55. North wind 6 to 8 mph. Chance of precipitation is 40%.

    High: 55 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 33. North wind around 5 mph becoming calm in the evening.

    Low: 33 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 57. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain after 1pm. Cloudy, with a high near 55. Chance of precipitation is 40%.

    High: 55 °F

    Cloudy then
    Chance Rain

Detailed Forecast

This Afternoon
Cloudy, with a high near 56. Calm wind.
Tonight
Rain, mainly after 11pm. Low around 48. Calm wind. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
A chance of showers, mainly before 10am. Cloudy through mid morning, then gradual clearing, with a high near 55. North wind 6 to 8 mph. Chance of precipitation is 40%.
Saturday Night
Partly cloudy, with a low around 33. North wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 57. Calm wind becoming southwest 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 35.
Monday
Sunny, with a high near 56.
Monday Night
Mostly cloudy, with a low around 39.
Tuesday
A chance of rain after 1pm. Cloudy, with a high near 55. Chance of precipitation is 40%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.
Wednesday
A chance of rain. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 39. Chance of precipitation is 30%.
Thanksgiving Day
Mostly sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Potomac MD
 39.06°N 77.2°W (Elev. 299 ft)
Last Update:
12:53 pm EST Nov 21, 2025
Forecast Valid:
1pm EST Nov 21, 2025-6pm EST Nov 27, 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