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.

Fair

18°F

-8°C

Humidity 92%
Wind Speed S 5 mph
Barometer 29.98 in (1017.4 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 19 Jan 7:56 am EST
Extended Forecast for

Derwood MD

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 40. South wind 6 to 15 mph becoming west in the afternoon. Winds could gust as high as 28 mph.

    High: 40 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 14. West wind 10 to 15 mph, with gusts as high as 26 mph.

    Low: 14 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 27. West wind 9 to 13 mph, with gusts as high as 24 mph.

    High: 27 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 14. Northwest wind around 5 mph becoming calm  in the evening.

    Low: 14 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 38. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 24 mph.

    High: 38 °F

    Mostly 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 47.

    High: 47 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22.

    Low: 22 °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. South wind 6 to 15 mph becoming west in the afternoon. Winds could gust as high as 28 mph.
Tonight
Mostly clear, with a low around 14. West wind 10 to 15 mph, with gusts as high as 26 mph.
Tuesday
Sunny, with a high near 27. West wind 9 to 13 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 14. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 38. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 29.
Thursday
Mostly sunny, with a high near 47.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Partly sunny, with a high near 36.
Friday Night
Mostly cloudy, with a low around 13.
Saturday
A chance of snow. Partly sunny, with a high near 20. Chance of precipitation is 30%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 9. Chance of precipitation is 30%.
Sunday
A chance of snow. Partly sunny, with a high near 20. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Derwood MD
 39.12°N 77.13°W (Elev. 348 ft)
6:53 am EST Jan 19, 2026
8am EST Jan 19, 2026-6pm EST Jan 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

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