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.

Mostly Cloudy

39°F

4°C

Humidity 39%
Wind Speed W 14 G 23 mph
Barometer 29.98 in (1017.2 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 17 Mar 2:56 pm EDT
Extended Forecast for

Olney MD

  • This Afternoon

    This Afternoon: Isolated snow showers. Mostly cloudy, with a high near 39. West wind around 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 39 °F

    Isolated Snow
    Showers

  • Tonight

    Tonight: Isolated snow showers before 10pm. Partly cloudy, with a low around 24. West wind 9 to 14 mph becoming light northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.

    Low: 24 °F

    Isolated Snow
    Showers then
    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 40. Calm wind becoming south around 6 mph in the afternoon.

    High: 40 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 28. South wind 3 to 5 mph.

    Low: 28 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 51. South wind 3 to 7 mph.

    High: 51 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 20%.

    Low: 37 °F

    Slight Chance
    Rain

  • Friday

    Friday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Isolated snow showers. Mostly cloudy, with a high near 39. West wind around 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Tonight
Isolated snow showers before 10pm. Partly cloudy, with a low around 24. West wind 9 to 14 mph becoming light northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 40. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 28. South wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 51. South wind 3 to 7 mph.
Thursday Night
A slight chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 56.
Friday Night
Mostly cloudy, with a low around 42.
Saturday
Partly sunny, with a high near 59.
Saturday Night
Mostly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 67.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 43. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 55.
Monday Night
Mostly clear, with a low around 29.
Tuesday
Mostly sunny, with a high near 47.
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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:
2:24 pm EDT Mar 17, 2026
Forecast Valid:
3pm EDT Mar 17, 2026-6pm EDT Mar 24, 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