Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Light Rain

63°F

17°C

Humidity NA
Wind Speed Calm
Barometer 30.14 in (1021.9 mb)
Dewpoint N/A
Visibility 2.00 mi
Last update 4 Oct 2:56 pm EDT
Extended Forecast for

Ashton-Sandy Spring MD

  • Tonight

    Tonight: Patchy fog.  Otherwise, mostly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog between 9am and 10am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 68. Northwest wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 68 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 44. Northwest wind around 6 mph.

    Low: 44 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 63. Northwest wind 3 to 5 mph.

    High: 63 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 45. Calm wind.

    Low: 45 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog. Otherwise, mostly cloudy, with a low around 55. Calm wind.
Monday
Patchy fog between 9am and 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 68. Northwest wind 6 to 13 mph, with gusts as high as 23 mph.
Monday Night
Clear, with a low around 44. Northwest wind around 6 mph.
Tuesday
Sunny, with a high near 63. Northwest wind 3 to 5 mph.
Tuesday Night
Clear, with a low around 45. Calm wind.
Wednesday
Sunny, with a high near 69.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 51.
Friday
Sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 52.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
A chance of showers. Partly sunny, with a high near 66. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Ashton-Sandy Spring MD
 39.15°N 77.01°W (Elev. 449 ft)
2:23 pm EDT Oct 4, 2026
3pm EDT Oct 4, 2026-6pm EDT Oct 11, 2026
 
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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