National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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.

Overcast

65°F

18°C

Humidity 73%
Wind Speed Calm
Barometer 30.27 in (1026.0 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 3 Oct 1:56 pm EDT
Extended Forecast for

Sandy Spring MD

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 67. Northeast wind around 6 mph.

    High: 67 °F

    Mostly Cloudy

  • Tonight

    Tonight: A chance of showers, mainly after 5am. Mostly cloudy, with a low around 57. Light east wind. Chance of precipitation is 30%.

    Low: 57 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers before 3pm, then a chance of showers after 4pm. High near 65. East wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 65 °F

    Showers

  • Sunday Night

    Sunday Night: Cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 69. Northwest wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 69 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Clear, with a low around 44.

    Low: 44 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 67. Northeast wind around 6 mph.
Tonight
A chance of showers, mainly after 5am. Mostly cloudy, with a low around 57. Light east wind. Chance of precipitation is 30%.
Sunday
Showers before 3pm, then a chance of showers after 4pm. High near 65. East wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Cloudy, with a low around 57. Calm wind.
Monday
Mostly sunny, with a high near 69. Northwest wind 6 to 13 mph, with gusts as high as 23 mph.
Monday Night
Clear, with a low around 44.
Tuesday
Sunny, with a high near 62.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 51.
Friday
Sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sandy Spring MD
 39.16°N 77.04°W (Elev. 469 ft)
Last Update:
10:54 am EDT Oct 3, 2026
Forecast Valid:
2pm EDT Oct 3, 2026-6pm EDT Oct 9, 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