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

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Partly Cloudy

82°F

28°C

Humidity 67%
Wind Speed Calm
Barometer 30.14 in (1021.6 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 29 Jun 11:56 am EDT
Extended Forecast for

Sandy Spring MD

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 85. Calm wind becoming southeast around 5 mph.

    High: 85 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 65. South wind around 6 mph becoming calm after midnight.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the morning.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. South wind around 7 mph.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. Southwest wind around 6 mph.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 77.

    Low: 77 °F

    Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 101. Chance of precipitation is 20%.

    High: 101 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Partly sunny, with a high near 85. Calm wind becoming southeast around 5 mph.
Tonight
Mostly clear, with a low around 65. South wind around 6 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the morning.
Tuesday Night
Mostly clear, with a low around 69. South wind around 7 mph.
Wednesday
Sunny, with a high near 96. Southwest wind around 6 mph.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny and hot, with a high near 100.
Thursday Night
Clear, with a low around 77.
Friday
A slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 101. Chance of precipitation is 20%.
Friday Night
A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Chance of precipitation is 20%.
Independence Day
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 97. Chance of precipitation is 40%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sandy Spring MD
 39.16°N 77.04°W (Elev. 469 ft)
Last Update:
12:44 pm EDT Jun 29, 2026
Forecast Valid:
12pm EDT Jun 29, 2026-6pm EDT Jul 5, 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