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

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

66°F

19°C

Humidity 65%
Wind Speed Calm
Barometer 29.93 in (1014.1 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 16 Apr 3:56 am EDT
Extended Forecast for

Derwood MD

  • Today

    Today: Mostly sunny, with a high near 92. Light west wind becoming southwest 6 to 11 mph in the morning.

    High: 92 °F

    Mostly Sunny

  • Tonight

    Tonight: Isolated showers after 11pm. Mostly cloudy, with a low around 66. Southwest wind around 9 mph becoming northwest after midnight. Chance of precipitation is 20%.

    Low: 66 °F

    Isolated
    Showers

  • Friday

    Friday: Partly sunny, with a high near 82. West wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. North wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers after 2pm. Mostly sunny, with a high near 90. Light east wind becoming south 6 to 11 mph in the morning. Chance of precipitation is 20%.

    High: 90 °F

    Sunny then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.

    High: 61 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers before 8pm. Partly cloudy, with a low around 39. Chance of precipitation is 30%.

    Low: 39 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 92. Light west wind becoming southwest 6 to 11 mph in the morning.
Tonight
Isolated showers after 11pm. Mostly cloudy, with a low around 66. Southwest wind around 9 mph becoming northwest after midnight. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 82. West wind 8 to 13 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 61. North wind around 5 mph becoming calm in the evening.
Saturday
A slight chance of showers after 2pm. Mostly sunny, with a high near 90. Light east wind becoming south 6 to 11 mph in the morning. Chance of precipitation is 20%.
Saturday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Sunday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
Sunday Night
A chance of showers before 8pm. Partly cloudy, with a low around 39. Chance of precipitation is 30%.
Monday
Sunny, with a high near 54.
Monday Night
Mostly clear, with a low around 35.
Tuesday
Sunny, with a high near 65.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Derwood MD
 39.12°N 77.13°W (Elev. 348 ft)
Last Update:
2:23 am EDT Apr 16, 2026
Forecast Valid:
4am EDT Apr 16, 2026-6pm EDT Apr 22, 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