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

Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

63°F

17°C

Humidity NA
Wind Speed Calm
Barometer 29.99 in (1016.6 mb)
Dewpoint N/A
Visibility 10.00 mi
Last update 15 Apr 12:56 am EDT
Extended Forecast for

Derwood MD

  • Overnight

    Overnight: Partly cloudy, with a low around 66. West wind around 5 mph becoming calm.

    Low: 66 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 92. Calm wind becoming southwest 5 to 9 mph in the morning.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 70. Southwest wind 3 to 6 mph.

    Low: 70 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 90. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 90 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers. Mostly cloudy, with a low around 68. West wind around 6 mph. Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    Showers

  • Friday

    Friday: A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 30%.

    High: 85 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 66. West wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 92. Calm wind becoming southwest 5 to 9 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 70. Southwest wind 3 to 6 mph.
Thursday
Partly sunny, with a high near 90. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 68. West wind around 6 mph. Chance of precipitation is 20%.
Friday
A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 30%.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 88.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Sunday Night
Showers likely. Partly cloudy, with a low around 41. Chance of precipitation is 60%.
Monday
Sunny, with a high near 58.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Sunny, with a high near 62.
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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 pm EDT Apr 14, 2026
Forecast Valid:
1am EDT Apr 15, 2026-6pm EDT Apr 21, 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