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

45°F

7°C

Humidity NA
Wind Speed W 5 mph
Barometer 29.83 in (1011.6 mb)
Dewpoint N/A
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 10 Jan 10:56 pm EST
Extended Forecast for

Olney MD

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. West wind 5 to 11 mph, with gusts as high as 22 mph.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain and snow showers between 1pm and 4pm. Mostly sunny, with a high near 42. Breezy, with a northwest wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 20%.

    High: 42 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 28. Breezy, with a west wind 14 to 20 mph, with gusts as high as 37 mph.

    Low: 28 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 43. West wind 7 to 13 mph, with gusts as high as 23 mph.

    High: 43 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 29. Southwest wind around 5 mph becoming calm in the evening.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 49.

    High: 49 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: A chance of rain. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.

    Low: 28 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. West wind 5 to 11 mph, with gusts as high as 22 mph.
Sunday
A slight chance of rain and snow showers between 1pm and 4pm. Mostly sunny, with a high near 42. Breezy, with a northwest wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 28. Breezy, with a west wind 14 to 20 mph, with gusts as high as 37 mph.
Monday
Sunny, with a high near 43. West wind 7 to 13 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 29. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Cloudy, with a high near 49.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 35.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Mostly sunny, with a high near 35.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Olney MD
 39.14°N 77.07°W (Elev. 499 ft)
Last Update:
9:53 pm EST Jan 10, 2026
Forecast Valid:
11pm EST Jan 10, 2026-6pm EST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation