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

41°F

5°C

Humidity 49%
Wind Speed Calm
Barometer 30.29 in (1027.6 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 24 Dec 6:56 pm EST
Extended Forecast for

Olney MDSimilar City Names

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. Calm wind becoming southeast around 5 mph after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Christmas Day

    Christmas Day: A chance of showers, mainly before 10am. Partly sunny, with a high near 52. South wind 7 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 30%.

    High: 52 °F

    Chance
    Showers then
    Partly Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 27. North wind around 7 mph.

    Low: 27 °F

    Increasing
    Clouds

  • Friday

    Friday: A slight chance of drizzle, snow, freezing rain, and sleet before 1pm, then freezing rain and sleet between 1pm and 4pm, then rain, freezing rain, and sleet after 4pm. High near 35. Northeast wind 5 to 8 mph becoming southeast in the afternoon. Chance of precipitation is 80%. New ice accumulation of less than a 0.1 of an inch possible. New snow and sleet accumulation of less than a half inch possible.

    High: 35 °F

    Slight Chance
    Wintry Mix
    then Wintry
    Mix

  • Friday Night

    Friday Night: Rain, freezing rain, and sleet before 10pm, then rain between 10pm and 4am, then a chance of rain or freezing rain after 4am. Low around 30. Southeast wind 5 to 7 mph. Chance of precipitation is 90%. New sleet accumulation of less than a half inch possible.

    Low: 30 °F

    Wintry Mix

  • Saturday

    Saturday: A chance of drizzle or freezing rain before 7am, then a slight chance of drizzle between 7am and 1pm. Cloudy, with a high near 40. Chance of precipitation is 30%.

    High: 40 °F

    Chance
    Drizzle/Freezing
    Rain then
    Slight Chance
    Drizzle

  • Saturday Night

    Saturday Night: Cloudy, with a low around 32.

    Low: 32 °F

    Cloudy

  • Sunday

    Sunday: A chance of rain. Cloudy, with a high near 45. Chance of precipitation is 40%.

    High: 45 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely. Cloudy, with a low around 38. Chance of precipitation is 70%.

    Low: 38 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly cloudy, with a low around 34. Calm wind becoming southeast around 5 mph after midnight.
Christmas Day
A chance of showers, mainly before 10am. Partly sunny, with a high near 52. South wind 7 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 30%.
Thursday Night
Increasing clouds, with a low around 27. North wind around 7 mph.
Friday
A slight chance of drizzle, snow, freezing rain, and sleet before 1pm, then freezing rain and sleet between 1pm and 4pm, then rain, freezing rain, and sleet after 4pm. High near 35. Northeast wind 5 to 8 mph becoming southeast in the afternoon. Chance of precipitation is 80%. New ice accumulation of less than a 0.1 of an inch possible. New snow and sleet accumulation of less than a half inch possible.
Friday Night
Rain, freezing rain, and sleet before 10pm, then rain between 10pm and 4am, then a chance of rain or freezing rain after 4am. Low around 30. Southeast wind 5 to 7 mph. Chance of precipitation is 90%. New sleet accumulation of less than a half inch possible.
Saturday
A chance of drizzle or freezing rain before 7am, then a slight chance of drizzle between 7am and 1pm. Cloudy, with a high near 40. Chance of precipitation is 30%.
Saturday Night
Cloudy, with a low around 32.
Sunday
A chance of rain. Cloudy, with a high near 45. Chance of precipitation is 40%.
Sunday Night
Rain likely. Cloudy, with a low around 38. Chance of precipitation is 70%.
Monday
A chance of rain before 1pm. Partly sunny, with a high near 49. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 33.
Tuesday Night
Partly cloudy, with a low around 22.
Wednesday
Mostly sunny, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Olney MDSimilar City Names
 39.14°N 77.1°W (Elev. 449 ft)
Last Update:
6:53 pm EST Dec 24, 2025
Forecast Valid:
7pm EST Dec 24, 2025-6pm EST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation