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.

Partly Cloudy

61°F

16°C

Humidity 65%
Wind Speed Calm
Barometer 29.96 in (1015.6 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 11 Mar 2:56 am EDT
Extended Forecast for

Sandy Spring MD

  • Overnight

    Overnight: Mostly cloudy, with a low around 57. South wind around 6 mph.

    Low: 57 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain after 3pm. Mostly cloudy, with a high near 78. South wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    High: 78 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 43. Southwest wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Chance
    Showers then
    Showers

  • Thursday

    Thursday: Showers, mainly before 8am. High near 45. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Showers and
    Breezy then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. Northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 53. Breezy.

    High: 53 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 57. South wind around 6 mph.
Wednesday
A chance of rain after 3pm. Mostly cloudy, with a high near 78. South wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of rain and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 43. Southwest wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers, mainly before 8am. High near 45. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Mostly clear, with a low around 31. Northwest wind 5 to 8 mph becoming calm after midnight.
Friday
Partly sunny, with a high near 53. Breezy.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 52.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Mostly cloudy, with a high near 59.
Sunday Night
Rain. Low around 48. Chance of precipitation is 80%.
Monday
Rain. High near 60. Chance of precipitation is 80%.
Monday Night
A chance of rain. Partly cloudy, with a low around 26. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sandy Spring MD
 39.16°N 77.04°W (Elev. 469 ft)
Last Update:
1:53 am EDT Mar 11, 2026
Forecast Valid:
3am EDT Mar 11, 2026-6pm EDT Mar 17, 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