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

24°F

-4°C

Humidity 88%
Wind Speed Calm
Barometer 30.07 in (1020.4 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 4 Dec 12:56 am EST
Extended Forecast for

Olney MD

  • Overnight

    Overnight: Mostly clear, with a low around 26. Light west wind.

    Low: 26 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 40. Light west wind becoming northwest 9 to 14 mph in the morning. Winds could gust as high as 25 mph.

    High: 40 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 20. Northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 20 °F

    Increasing
    Clouds

  • Friday

    Friday: A chance of snow. Mostly cloudy, with a high near 31. Calm wind becoming southeast around 6 mph. Chance of precipitation is 50%.

    High: 31 °F

    Chance Snow

  • Friday Night

    Friday Night: A slight chance of snow before 1am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 20%.

    Low: 22 °F

    Slight Chance
    Snow

  • Saturday

    Saturday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 26. Light west wind.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 40. Light west wind becoming northwest 9 to 14 mph in the morning. Winds could gust as high as 25 mph.
Thursday Night
Increasing clouds, with a low around 20. Northwest wind 5 to 8 mph becoming calm after midnight.
Friday
A chance of snow. Mostly cloudy, with a high near 31. Calm wind becoming southeast around 6 mph. Chance of precipitation is 50%.
Friday Night
A slight chance of snow before 1am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 20%.
Saturday
Partly sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Partly sunny, with a high near 42.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 16.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
Mostly cloudy, with a high near 43.
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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:
12:53 am EST Dec 4, 2025
Forecast Valid:
1am EST Dec 4, 2025-6pm EST Dec 10, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation