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

Tracking Atmospheric River for the West Coast; Space Weather Storming Continues

An atmospheric river will bring threats of gusty to high winds and heavy rainfall to California mainly Thursday into Saturday which may bring areas of flooding and wind damage. Heavy snow will be possible over the Sierra Nevada mountains Thursday into Friday associated with the atmospheric river. Minor to severe geomagnetic storming (space weather) is expected to continue into early Thursday. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast and Breezy

58°F

14°C

Humidity 33%
Wind Speed W 22 G 25 mph
Barometer 29.78 in (1009.9 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 12 Nov 3:56 pm EST
Extended Forecast for

Ashton-Sandy Spring MD

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 37. West wind 6 to 8 mph, with gusts as high as 21 mph.

    Low: 37 °F

    Gradual
    Clearing

  • Thursday

    Thursday: Sunny, with a high near 54. Northwest wind 7 to 14 mph, with gusts as high as 26 mph.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. Northwest wind 3 to 6 mph.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 54. West wind 5 to 10 mph.

    High: 54 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 31. Light north wind.

    Low: 31 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of rain. Mostly cloudy, with a low around 47. Chance of precipitation is 50%.

    Low: 47 °F

    Chance Rain

  • Sunday

    Sunday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 37. West wind 6 to 8 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 54. Northwest wind 7 to 14 mph, with gusts as high as 26 mph.
Thursday Night
Mostly clear, with a low around 31. Northwest wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 54. West wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 31. Light north wind.
Saturday
Partly sunny, with a high near 56.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 47. Chance of precipitation is 50%.
Sunday
Mostly sunny, with a high near 63.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 33.
Tuesday
A chance of rain. Partly sunny, with a high near 50. Chance of precipitation is 30%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ashton-Sandy Spring MD
 39.15°N 77.01°W (Elev. 449 ft)
Last Update:
3:29 pm EST Nov 12, 2025
Forecast Valid:
4pm EST Nov 12, 2025-6pm EST Nov 19, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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