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.

Fair

86°F

30°C

Humidity 48%
Wind Speed W 8 mph
Barometer 29.99 in (1016.4 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 2 Oct 12:56 pm EDT
Extended Forecast for

Derwood MD

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 86. West wind around 8 mph.

    High: 86 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. North wind 6 to 8 mph. Chance of precipitation is 40%.

    Low: 58 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 68. North wind 6 to 8 mph.

    High: 68 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers after 2am. Increasing clouds, with a low around 57. Calm wind. Chance of precipitation is 20%.

    Low: 57 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly between 8am and 2pm. Cloudy, with a high near 64. East wind around 6 mph. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers before 8pm. Cloudy, with a low around 56. Chance of precipitation is 30%.

    Low: 56 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Monday Night

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

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 86. West wind around 8 mph.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. North wind 6 to 8 mph. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 68. North wind 6 to 8 mph.
Saturday Night
A slight chance of showers after 2am. Increasing clouds, with a low around 57. Calm wind. Chance of precipitation is 20%.
Sunday
Showers likely, mainly between 8am and 2pm. Cloudy, with a high near 64. East wind around 6 mph. Chance of precipitation is 70%.
Sunday Night
A chance of showers before 8pm. Cloudy, with a low around 56. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 69.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Derwood MD
 39.12°N 77.13°W (Elev. 348 ft)
Last Update:
10:53 am EDT Oct 2, 2026
Forecast Valid:
1pm EDT Oct 2, 2026-6pm EDT Oct 8, 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