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

40°F

4°C

Humidity 70%
Wind Speed Vrbl 7 mph
Barometer 30.08 in (1020.4 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 27 Dec 12:56 pm EST
Extended Forecast for

Olney MD

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 40. North wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 40 °F

    Partly Sunny

  • Tonight

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

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of rain after 1pm. Mostly cloudy, with a high near 46. Calm wind becoming south 5 to 8 mph in the morning. Chance of precipitation is 20%.

    High: 46 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: A slight chance of rain after 1am. Cloudy, with a low around 40. South wind 8 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 40 °F

    Cloudy then
    Slight Chance
    Rain

  • Monday

    Monday: A chance of rain, mainly before 1pm. Partly sunny, with a high near 55. Breezy, with a southwest wind 15 to 21 mph becoming west in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 50%.

    High: 55 °F

    Chance Rain
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 26. Breezy.

    Low: 26 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34. Breezy.

    High: 34 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 40. North wind 8 to 11 mph, with gusts as high as 18 mph.
Tonight
Partly cloudy, with a low around 26. Light north wind.
Sunday
A slight chance of rain after 1pm. Mostly cloudy, with a high near 46. Calm wind becoming south 5 to 8 mph in the morning. Chance of precipitation is 20%.
Sunday Night
A slight chance of rain after 1am. Cloudy, with a low around 40. South wind 8 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday
A chance of rain, mainly before 1pm. Partly sunny, with a high near 55. Breezy, with a southwest wind 15 to 21 mph becoming west in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 50%.
Monday Night
Partly cloudy, with a low around 26. Breezy.
Tuesday
Mostly sunny, with a high near 34. Breezy.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Mostly sunny, with a high near 40.
Wednesday Night
Mostly cloudy, with a low around 26.
New Year's Day
Mostly cloudy, with a high near 39.
Thursday Night
Partly cloudy, with a low around 19.
Friday
Sunny, with a high near 34.
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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 pm EST Dec 27, 2025
Forecast Valid:
12pm EST Dec 27, 2025-6pm EST Jan 2, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation