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Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

A Few Clouds

73°F

23°C

Humidity NA
Wind Speed Calm
Barometer 29.93 in (1014.3 mb)
Dewpoint N/A
Visibility 7.00 mi
Last update 16 Aug 9:56 pm EDT
Extended Forecast for

Ashton-Sandy Spring MD

Flood Watch until August 17, 03:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until August 17, 03:00am

    NOW until 3:00am Mon

    Flood Watch

  • Tonight

    Low: 70 °F

    Severe
    Thunderstorms

  • Monday

    Monday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Northwest wind 6 to 8 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 before 8pm. Partly cloudy, with a low around 68. Light northwest wind. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 84. North wind 5 to 7 mph.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 69. Chance of precipitation is 20%.

    Low: 69 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.

    High: 84 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 2am, then a slight chance of showers. Some of the storms could be severe. Low around 70. Southwest wind 3 to 7 mph. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Northwest wind 6 to 8 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 68. Light northwest wind. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 84. North wind 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 65. Calm wind.
Wednesday
Sunny, with a high near 86.
Wednesday Night
A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 69. Chance of precipitation is 20%.
Thursday
A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Friday
A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Saturday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 20%.
Sunday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 20%.
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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:
8:01 pm EDT Aug 16, 2026
Forecast Valid:
9pm EDT Aug 16, 2026-6pm EDT Aug 23, 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