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

64°F

18°C

Humidity 100%
Wind Speed Calm
Barometer 29.96 in (1015.8 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 26 Jul 3:56 am EDT
Extended Forecast for

Sandy Spring MD

  • Today

    Today: A chance of thunderstorms after 5pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 83. Light and variable wind. Chance of precipitation is 30%.

    High: 83 °F

    Patchy Fog
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Partly cloudy, with a low around 64. Light and variable wind. Chance of precipitation is 50%.

    Low: 64 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms, mainly after 5pm. Increasing clouds, with a high near 86. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Light south wind. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 82. South wind 5 to 8 mph. Chance of precipitation is 90%.

    High: 82 °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. Mostly sunny, with a high near 82. Chance of precipitation is 30%.

    High: 82 °F

    Mostly 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
    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 20%.

    High: 80 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
A chance of thunderstorms after 5pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 83. Light and variable wind. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Partly cloudy, with a low around 64. Light and variable wind. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms, mainly after 5pm. Increasing clouds, with a high near 86. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Light south wind. Chance of precipitation is 50%.
Tuesday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 82. South wind 5 to 8 mph. Chance of precipitation is 90%.
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. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Thursday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 64.
Friday
Sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 67.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 40%.
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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 am EDT Jul 26, 2026
Forecast Valid:
4am 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