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

33°F

1°C

Humidity 38%
Wind Speed NW 6 mph
Barometer 30.02 in (1018.5 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 19 Jan 5:56 pm EST
Extended Forecast for

Olney MD

  • Tonight

    Tonight: Mostly clear, with a low around 15. West wind 9 to 15 mph, with gusts as high as 26 mph.

    Low: 15 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 26. West wind 10 to 14 mph, with gusts as high as 25 mph.

    High: 26 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 13. Light and variable wind.

    Low: 13 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37. Light south wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 26 mph.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 28. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.

    Low: 28 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 15. West wind 9 to 15 mph, with gusts as high as 26 mph.
Tuesday
Sunny, with a high near 26. West wind 10 to 14 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 13. Light and variable wind.
Wednesday
Mostly sunny, with a high near 37. Light south wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 28. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.
Thursday
Mostly sunny, with a high near 48.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Partly sunny, with a high near 35.
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 9. Chance of precipitation is 50%.
Sunday
A chance of snow. Partly sunny, with a high near 18. Chance of precipitation is 50%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 7. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 23.
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ABOUT THIS FORECAST

 
Point Forecast:
Olney MD
 39.16°N 77.06°W (Elev. 486 ft)
3:53 pm EST Jan 19, 2026
6pm EST Jan 19, 2026-6pm EST Jan 26, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database