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Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Partly Cloudy

87°F

31°C

Humidity 72%
Wind Speed Vrbl 3 mph
Barometer 30.08 in (1019.3 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 28 Jun 1:56 pm EDT
Extended Forecast for

Ashton-Sandy Spring MD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 90. Southwest wind around 6 mph.

    High: 90 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    T-storms then
    Patchy Fog

  • Sunday

    Sunday: A chance of showers and thunderstorms, mainly between 3pm and 5pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Light northwest wind. Chance of precipitation is 30%.

    High: 89 °F

    Patchy Fog
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms

  • Monday

    Monday: A slight chance of showers, then showers and thunderstorms likely after 11am. Partly sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%.

    High: 89 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 74. Chance of precipitation is 60%.

    Low: 74 °F

    Showers
    Likely then
    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm, mainly after 2pm. High near 88. Chance of precipitation is 80%.

    High: 88 °F

    Chance
    Showers then
    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Low around 69. Chance of precipitation is 80%.

    Low: 69 °F

    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 90. Southwest wind around 6 mph.
Tonight
A chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms, mainly between 3pm and 5pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Light northwest wind. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.
Monday
A slight chance of showers, then showers and thunderstorms likely after 11am. Partly sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%.
Monday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 74. Chance of precipitation is 60%.
Tuesday
Showers and possibly a thunderstorm, mainly after 2pm. High near 88. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Low around 69. Chance of precipitation is 80%.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 67.
Independence Day
Sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Ashton-Sandy Spring MD
 39.15°N 77.01°W (Elev. 449 ft)
Last Update:
1:30 pm EDT Jun 28, 2025
Forecast Valid:
2pm EDT Jun 28, 2025-6pm EDT Jul 4, 2025
 
Forecast Discussion
 
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Additional Resources

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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