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

54°F

12°C

Humidity 20%
Wind Speed Vrbl 5 mph
Barometer 30.53 in (1035.6 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 8 Apr 4:56 pm EDT
Extended Forecast for

Derwood MD

Frost Advisory April 9, 12:00am until April 9, 09:00am
Click here for hazard details and duration
Frost Advisory

  • Tonight

    Tonight: Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33. Southeast wind 5 to 7 mph becoming calm after midnight.

    Low: 33 °F

    Mostly Clear
    then 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 41. Southeast wind 3 to 6 mph.

    Low: 41 °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 afternoon.

    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: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly 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 71.

    High: 71 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33. Southeast wind 5 to 7 mph becoming calm after midnight.
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 41. Southeast wind 3 to 6 mph.
Friday
Patchy fog before 9am. Otherwise, sunny, with a high near 74. Calm wind becoming south 5 to 8 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 53. South wind around 6 mph becoming west after midnight.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Mostly sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Partly sunny, with a high near 84.
Monday Night
Mostly cloudy, with a low around 66.
Tuesday
Partly sunny, with a high near 90.
Tuesday Night
Mostly cloudy, with a low around 69.
Wednesday
A chance of showers. Partly sunny, with a high near 91. Chance of precipitation is 30%.
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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:
4:53 pm EDT Apr 8, 2026
Forecast Valid:
5pm EDT Apr 8, 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