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

35°F

2°C

Humidity 89%
Wind Speed SE 3 mph
Barometer 30.55 in (1036.4 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 9 Apr 2:56 am EDT
Extended Forecast for

Derwood MD

Frost Advisory until April 9, 09:00am
Click here for hazard details and duration
Frost Advisory
  •  
    Frost Advisory until April 9, 09:00am

    NOW until 9:00am Thu

    Frost Advisory

  • Overnight

    Low: 33 °F

    Frost

  • Thursday

    Thursday: Widespread frost, mainly before 7am. Otherwise, mostly sunny, with a high near 61. Calm wind becoming south around 6 mph in the afternoon.

    High: 61 °F

    Frost then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40. Southeast wind around 6 mph becoming calm after midnight.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Patchy fog before 9am. Otherwise, sunny, with a high near 74. Calm wind becoming south 5 to 8 mph in the morning.

    High: 74 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 53. South wind around 6 mph becoming west after midnight.

    Low: 53 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Overnight
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33. Calm wind.
Thursday
Widespread frost, mainly before 7am. Otherwise, mostly sunny, with a high near 61. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 40. Southeast wind around 6 mph becoming calm after midnight.
Friday
Patchy fog before 9am. Otherwise, sunny, with a high near 74. Calm wind becoming south 5 to 8 mph in the morning.
Friday Night
Mostly cloudy, with a low around 53. South wind around 6 mph becoming west after midnight.
Saturday
Sunny, with a high near 68.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Mostly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly cloudy, with a high near 83.
Monday Night
Mostly cloudy, with a low around 63.
Tuesday
Mostly sunny, with a high near 88.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
Mostly sunny, with a high near 90.
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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:
2:23 am EDT Apr 9, 2026
Forecast Valid:
3am EDT Apr 9, 2026-6pm EDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

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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