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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Ashton-Sandy Spring MD

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 15. Light north wind.

    Low: 15 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 34. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 34 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 28. South wind 6 to 8 mph, with gusts as high as 18 mph.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain or freezing rain before 10am, then a chance of rain. Mostly cloudy, with a high near 45. South wind 9 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    High: 45 °F

    Chance
    Rain/Freezing
    Rain then
    Chance Rain

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 31. West wind around 10 mph, with gusts as high as 21 mph.

    Low: 31 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of snow. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.

    Low: 25 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 15. Light north wind.
Tuesday
Sunny, with a high near 34. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 28. South wind 6 to 8 mph, with gusts as high as 18 mph.
Wednesday
A slight chance of rain or freezing rain before 10am, then a chance of rain. Mostly cloudy, with a high near 45. South wind 9 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 31. West wind around 10 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 40.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
Partly sunny, with a high near 37.
Friday Night
A chance of snow. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 36.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Mostly sunny, with a high near 32.
Sunday Night
Mostly clear, with a low around 16.
Monday
Mostly sunny, with a high near 33.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ashton-Sandy Spring MD
 39.15°N 77.01°W (Elev. 449 ft)
Last Update:
9:52 pm EST Dec 8, 2025
Forecast Valid:
11pm EST Dec 8, 2025-6pm EST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation