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

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

46°F

8°C

Humidity 77%
Wind Speed Calm
Barometer 30.39 in (1030.4 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 12 Apr 12:56 am EDT
Extended Forecast for

Derwood MD

  • Overnight

    Overnight: Mostly clear, with a low around 45. Light northeast wind.

    Low: 45 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 71. East wind 6 to 10 mph becoming south in the afternoon. Winds could gust as high as 18 mph.

    High: 71 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 56. Southeast wind around 10 mph, with gusts as high as 18 mph.

    Low: 56 °F

    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers after 3pm. Partly sunny, with a high near 84. Southwest wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 84 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 62. West wind 3 to 7 mph. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 20%.

    High: 88 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 69.

    Low: 69 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 45. Light northeast wind.
Sunday
Mostly sunny, with a high near 71. East wind 6 to 10 mph becoming south in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 56. Southeast wind around 10 mph, with gusts as high as 18 mph.
Monday
A slight chance of showers after 3pm. Partly sunny, with a high near 84. Southwest wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Monday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 62. West wind 3 to 7 mph. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Tuesday
A slight chance of showers after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
Mostly cloudy, with a low around 69.
Thursday
Partly sunny, with a high near 92.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Friday Night
A chance of showers. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Saturday
A chance of showers. Partly sunny, with a high near 87. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
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 11, 2026
Forecast Valid:
1am EDT Apr 12, 2026-6pm EDT Apr 18, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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