National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

46°F

8°C

Humidity 93%
Wind Speed NW 7 mph
Barometer 30.04 in (1018.9 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 24 Dec 3:56 am EST
Extended Forecast for

Olney MD

  • Today

    Today: Sunny, with a high near 49. Northwest wind 7 to 15 mph, with gusts as high as 28 mph.

    High: 49 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. Light and variable wind.

    Low: 34 °F

    Mostly Cloudy

  • Christmas Day

    Christmas Day: A chance of rain, mainly between 7am and 1pm. Mostly cloudy, with a high near 51. South wind 7 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 30%.

    High: 51 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 27. North wind around 7 mph.

    Low: 27 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of snow, freezing rain, and sleet before 1pm, then rain and sleet between 1pm and 4pm, then rain, freezing rain, and sleet after 4pm. High near 34. Northeast wind 5 to 8 mph becoming southeast in the afternoon. Chance of precipitation is 80%. New snow and sleet accumulation of less than a half inch possible.

    High: 34 °F

    Chance Wintry
    Mix then
    Wintry Mix

  • Friday Night

    Friday Night: Freezing rain and sleet before 1am, then a chance of rain or freezing rain between 1am and 4am, then a chance of rain after 4am. Low around 29. Chance of precipitation is 90%. New sleet accumulation of less than a half inch possible.

    Low: 29 °F

    Wintry Mix

  • Saturday

    Saturday: Mostly cloudy, with a high near 41.

    High: 41 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain likely, mainly after 1pm. Cloudy, with a high near 46. Chance of precipitation is 60%.

    High: 46 °F

    Rain Likely

Detailed Forecast

Today
Sunny, with a high near 49. Northwest wind 7 to 15 mph, with gusts as high as 28 mph.
Tonight
Mostly cloudy, with a low around 34. Light and variable wind.
Christmas Day
A chance of rain, mainly between 7am and 1pm. Mostly cloudy, with a high near 51. South wind 7 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 27. North wind around 7 mph.
Friday
A chance of snow, freezing rain, and sleet before 1pm, then rain and sleet between 1pm and 4pm, then rain, freezing rain, and sleet after 4pm. High near 34. Northeast wind 5 to 8 mph becoming southeast in the afternoon. Chance of precipitation is 80%. New snow and sleet accumulation of less than a half inch possible.
Friday Night
Freezing rain and sleet before 1am, then a chance of rain or freezing rain between 1am and 4am, then a chance of rain after 4am. Low around 29. Chance of precipitation is 90%. New sleet accumulation of less than a half inch possible.
Saturday
Mostly cloudy, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 33.
Sunday
Rain likely, mainly after 1pm. Cloudy, with a high near 46. Chance of precipitation is 60%.
Sunday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 38. Breezy.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 30.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Olney MD
 39.16°N 77.06°W (Elev. 486 ft)
Last Update:
3:53 am EST Dec 24, 2025
Forecast Valid:
4am EST Dec 24, 2025-6pm EST Dec 30, 2025
 
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Additional Resources

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Chance of Precipitation