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.

Mostly Cloudy

42°F

6°C

Humidity 96%
Wind Speed Calm
Barometer 29.76 in (1009.4 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 6 Jan 5:56 pm EST
Extended Forecast for

Sandy Spring MD

  • Tonight

    Tonight: Mostly cloudy, with a low around 41. Light and variable wind becoming southwest around 6 mph in the evening.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 54. West wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 54 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 34. Northwest wind around 6 mph becoming calm in the evening.

    Low: 34 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 52. Calm wind becoming south around 5 mph in the afternoon.

    High: 52 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of rain after 1am. Mostly cloudy, with a low around 41. Southeast wind 3 to 6 mph. Chance of precipitation is 20%.

    Low: 41 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Rain likely, mainly after 1pm. Cloudy, with a high near 60. Chance of precipitation is 60%.

    High: 60 °F

    Rain Likely

  • Friday Night

    Friday Night: Rain likely, mainly after 1am. Cloudy, with a low around 53. Chance of precipitation is 70%.

    Low: 53 °F

    Rain Likely

  • Saturday

    Saturday: Rain. High near 62. Chance of precipitation is 90%.

    High: 62 °F

    Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly cloudy, with a low around 41. Light and variable wind becoming southwest around 6 mph in the evening.
Wednesday
Mostly sunny, with a high near 54. West wind 6 to 13 mph, with gusts as high as 23 mph.
Wednesday Night
Mostly clear, with a low around 34. Northwest wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 52. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 41. Southeast wind 3 to 6 mph. Chance of precipitation is 20%.
Friday
Rain likely, mainly after 1pm. Cloudy, with a high near 60. Chance of precipitation is 60%.
Friday Night
Rain likely, mainly after 1am. Cloudy, with a low around 53. Chance of precipitation is 70%.
Saturday
Rain. High near 62. Chance of precipitation is 90%.
Saturday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Sunday
Partly sunny, with a high near 49.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Mostly sunny, with a high near 42.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Partly sunny, with a high near 46.
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ABOUT THIS FORECAST

 
Point Forecast:
Sandy Spring MD
 39.16°N 77.04°W (Elev. 469 ft)
Last Update:
3:53 pm EST Jan 6, 2026
Forecast Valid:
6pm EST Jan 6, 2026-6pm EST Jan 13, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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