Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Partly Cloudy

35°F

2°C

Humidity 44%
Wind Speed W 14 G 22 mph
Barometer 29.96 in (1016.7 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 19 Jan 11:56 am EST
Extended Forecast for

Derwood MD

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 40. West wind 13 to 15 mph, with gusts as high as 28 mph.

    High: 40 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 15. Northwest wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 15 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 27. West wind 8 to 11 mph, with gusts as high as 22 mph.

    High: 27 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 14. Light and variable wind.

    Low: 14 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 38. Light southeast wind becoming south 9 to 14 mph in the morning. Winds could gust as high as 26 mph.

    High: 38 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

Detailed Forecast

M.L.King Day
Mostly sunny, with a high near 40. West wind 13 to 15 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 15. Northwest wind 8 to 11 mph, with gusts as high as 22 mph.
Tuesday
Sunny, with a high near 27. West wind 8 to 11 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 14. Light and variable wind.
Wednesday
Sunny, with a high near 38. Light southeast wind becoming south 9 to 14 mph in the morning. Winds could gust as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 29.
Thursday
Mostly sunny, with a high near 49.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Partly sunny, with a high near 36.
Friday Night
Mostly cloudy, with a low around 11.
Saturday
A chance of snow. Mostly cloudy, with a high near 18. Chance of precipitation is 40%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 10. Chance of precipitation is 50%.
Sunday
A chance of snow. Partly sunny, with a high near 19. Chance of precipitation is 50%.
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ABOUT THIS FORECAST

 
Point Forecast:
Derwood MD
 39.12°N 77.13°W (Elev. 348 ft)
12:41 pm EST Jan 19, 2026
12pm EST Jan 19, 2026-6pm EST Jan 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database