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

16°F

-9°C

Humidity 45%
Wind Speed NW 10 mph
Barometer 30.30 in (1028.4 mb)
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 20 Jan 5:56 am EST
Extended Forecast for

Rockville MD

  • Today

    Today: Sunny, with a high near 27. West wind 6 to 13 mph, with gusts as high as 24 mph.

    High: 27 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 13. Northwest wind around 5 mph becoming calm  after midnight.

    Low: 13 °F

    Mostly Clear

  • Wednesday

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

    High: 38 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31. South wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 48. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 48 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow.  Mostly cloudy, with a high near 19. Chance of precipitation is 40%.

    High: 19 °F

    Chance Snow

Detailed Forecast

Today
Sunny, with a high near 27. West wind 6 to 13 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 13. Northwest wind around 5 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 38. Light and variable wind becoming south 9 to 14 mph in the morning. Winds could gust as high as 26 mph.
Wednesday Night
Mostly cloudy, with a low around 31. South wind 8 to 11 mph, with gusts as high as 22 mph.
Thursday
Mostly sunny, with a high near 48. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 26.
Friday
Partly sunny, with a high near 36.
Friday Night
Mostly cloudy, with a low around 10.
Saturday
A chance of snow. Mostly cloudy, with a high near 19. Chance of precipitation is 40%.
Saturday Night
Snow likely, mainly after 1am. Cloudy, with a low around 13. Chance of precipitation is 60%.
Sunday
Snow likely. Mostly cloudy, with a high near 21. Chance of precipitation is 60%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 10. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 24.
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ABOUT THIS FORECAST

 
Point Forecast:
Rockville MD
 39.08°N 77.16°W (Elev. 430 ft)
5:33 am EST Jan 20, 2026
6am EST Jan 20, 2026-6pm EST Jan 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database