Heat and Fire Weather Concerns West; Heavy Rain and Thunderstorms from Plains to mid-Atlantic

Thunderstorms and locally heavy rainfall is expected from the Central Plains to the Ohio Valley, mid-Atlantic and across the Southeast. Severe weather from the Upper Midwest to Central Plains increases on Friday. Major to Extreme HeatRisk continues across the Southern Plains to the lower Mississippi Valley late this week. Fire weather concerns for the northern Rockies and northern Plains today. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

A Few Clouds

81°F

27°C

Humidity 67%
Wind Speed W 7 mph
Barometer 29.93 in (1014.3 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 10 Sep 6:56 pm EDT
Extended Forecast for

Sandy Spring MD

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 3am.  Mostly cloudy, with a low around 67. Light north wind.  Chance of precipitation is 30%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A chance of showers before 8am.  Mostly cloudy, with a high near 79. North wind 3 to 6 mph.  Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm, mainly after 5pm.  Mostly cloudy, with a high near 81. Southeast wind 5 to 7 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Partly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers.  Low around 67. Southeast wind around 5 mph becoming calm  after midnight.  Chance of precipitation is 80%.

    Low: 67 °F

    Showers

  • Sunday

    Sunday: A chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 67. Light north wind. Chance of precipitation is 30%.
Friday
A chance of showers before 8am. Mostly cloudy, with a high near 79. North wind 3 to 6 mph. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 65. Calm wind.
Saturday
Showers likely and possibly a thunderstorm, mainly after 5pm. Mostly cloudy, with a high near 81. Southeast wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 67. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 80%.
Sunday
A chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 65.
Monday
Mostly sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 83.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Sandy Spring MD
 39.14°N 77.04°W (Elev. 463 ft)
4:53 pm EDT Sep 10, 2026
7pm EDT Sep 10, 2026-6pm EDT Sep 17, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database