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.

Overcast

49°F

9°C

Humidity 44%
Wind Speed S 8 mph
Barometer 29.52 in (1001.1 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 14 Jan 3:56 pm EST
Extended Forecast for

Olney MD

  • This Afternoon

    This Afternoon: Cloudy, with a high near 51. South wind around 8 mph.

    High: 51 °F

    Cloudy

  • Tonight

    Tonight: Rain likely, mainly before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 27. Blustery, with a southwest wind 7 to 12 mph becoming northwest 16 to 21 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 27 °F

    Chance Rain
    then Rain
    Likely and
    Blustery

  • Thursday

    Thursday: Mostly sunny, with a high near 30. West wind around 18 mph, with gusts as high as 32 mph.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 19. West wind 10 to 15 mph, with gusts as high as 29 mph.

    Low: 19 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 34. West wind 7 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph.

    High: 34 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow showers before 1pm, then a chance of rain showers. Partly sunny, with a high near 43. Chance of precipitation is 40%.

    High: 43 °F

    Chance Snow
    Showers then
    Chance
    Rain/Snow

  • Saturday Night

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

    Low: 24 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Cloudy, with a high near 51. South wind around 8 mph.
Tonight
Rain likely, mainly before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 27. Blustery, with a southwest wind 7 to 12 mph becoming northwest 16 to 21 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly sunny, with a high near 30. West wind around 18 mph, with gusts as high as 32 mph.
Thursday Night
Mostly clear, with a low around 19. West wind 10 to 15 mph, with gusts as high as 29 mph.
Friday
Mostly sunny, with a high near 34. West wind 7 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 30.
Saturday
A chance of snow showers before 1pm, then a chance of rain showers. Partly sunny, with a high near 43. Chance of precipitation is 40%.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
Partly sunny, with a high near 29.
Sunday Night
Mostly clear, with a low around 16.
M.L.King Day
Sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 14.
Tuesday
Mostly sunny, with a high near 26.
Tuesday Night
Mostly clear, with a low around 13.
Wednesday
Mostly sunny, with a high near 32.
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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:
3:54 pm EST Jan 14, 2026
Forecast Valid:
4pm EST Jan 14, 2026-6pm EST Jan 21, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation