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.

Overcast

80°F

27°C

Humidity 64%
Wind Speed W 5 mph
Barometer 29.92 in (1014.2 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 26 Jul 1:56 pm EDT
Extended Forecast for

Sandy Spring MD

  • This Afternoon

    This Afternoon: A slight chance of showers. Partly sunny, with a high near 83. Light southeast wind. Chance of precipitation is 20%.

    High: 83 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Scattered showers and thunderstorms before 2am. Partly cloudy, with a low around 65. Light and variable wind. Chance of precipitation is 40%.

    Low: 65 °F

    Scattered
    Showers

  • Monday

    Monday: Scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Light south wind. Chance of precipitation is 50%.

    High: 85 °F

    Mostly Sunny
    then
    Scattered
    T-storms

  • Monday Night

    Monday Night: Scattered showers and thunderstorms before 8pm, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67. Light south wind. Chance of precipitation is 30%.

    Low: 67 °F

    Scattered
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 81. South wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.

    High: 81 °F

    Showers
    Likely then
    Showers

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Low around 65. Chance of precipitation is 80%.

    Low: 65 °F

    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 40%.

    High: 81 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 64. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of showers. Partly sunny, with a high near 83. Light southeast wind. Chance of precipitation is 20%.
Tonight
Scattered showers and thunderstorms before 2am. Partly cloudy, with a low around 65. Light and variable wind. Chance of precipitation is 40%.
Monday
Scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Light south wind. Chance of precipitation is 50%.
Monday Night
Scattered showers and thunderstorms before 8pm, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67. Light south wind. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 81. South wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Tuesday Night
Showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Low around 65. Chance of precipitation is 80%.
Wednesday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 64.
Friday
Sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 67.
Saturday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Sandy Spring MD
 39.16°N 77.04°W (Elev. 469 ft)
Last Update:
2:23 pm EDT Jul 26, 2026
Forecast Valid:
2pm EDT Jul 26, 2026-6pm EDT Aug 1, 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