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.

Rain

45°F

7°C

Humidity NA
Wind Speed NE 3 mph
Barometer 29.99 in (1017.1 mb)
Dewpoint N/A
Visibility 4.00 mi
Last update 10 Jan 2:56 pm EST
Extended Forecast for

Olney MD

  • This Afternoon

    This Afternoon: Rain. High near 46. East wind around 9 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 46 °F

    Rain

  • Tonight

    Tonight: A chance of rain, mainly before 1am. Mostly cloudy, with a low around 35. Light and variable wind becoming northwest 6 to 11 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 50%.

    Low: 35 °F

    Chance Rain
    then 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 40 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 28.

    Low: 28 °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

Detailed Forecast

This Afternoon
Rain. High near 46. East wind around 9 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
A chance of rain, mainly before 1am. Mostly cloudy, with a low around 35. Light and variable wind becoming northwest 6 to 11 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 50%.
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 40 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 28.
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
Partly sunny, with a high near 39.
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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:
12:54 pm EST Jan 10, 2026
Forecast Valid:
3pm EST Jan 10, 2026-6pm EST Jan 17, 2026
 
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