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

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fog/Mist

29°F

-2°C

Humidity 100%
Wind Speed Calm
Barometer 30.01 in (1018.3 mb)
Dewpoint 29°F (-2°C)
Visibility 6.00 mi
Last update 6 Dec 9:56 pm EST
Extended Forecast for

Olney MD

  • Tonight

    Tonight: Partly cloudy, with a low around 26. Light north wind.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41. Calm wind becoming south around 6 mph in the afternoon.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 25. Light and variable wind becoming north 5 to 10 mph after midnight.

    Low: 25 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 32. North wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 32 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15. North wind around 5 mph becoming calm in the evening.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 26. Light north wind.
Sunday
Partly sunny, with a high near 41. Calm wind becoming south around 6 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 25. Light and variable wind becoming north 5 to 10 mph after midnight.
Monday
Partly sunny, with a high near 32. North wind 9 to 11 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 15. North wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Mostly cloudy, with a high near 46.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
Partly sunny, with a high near 44.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Friday
A chance of rain. Partly sunny, with a high near 41. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 20.
Saturday
Mostly sunny, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Olney MD
 39.16°N 77.06°W (Elev. 486 ft)
Last Update:
9:53 pm EST Dec 6, 2025
Forecast Valid:
10pm EST Dec 6, 2025-6pm EST Dec 13, 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