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.

Fair

29°F

-2°C

Humidity 66%
Wind Speed W 9 mph
Barometer 30.24 in (1025.9 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 12 Jan 3:56 am EST
Extended Forecast for

Olney MD

  • Today

    Today: Mostly sunny, with a high near 44. Northwest wind 7 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.

    High: 44 °F

    Mostly Sunny

  • Tonight

    Tonight: 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 47. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 47 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. Southwest wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Mostly cloudy, with a high near 49. Southwest wind 5 to 7 mph. Chance of precipitation is 30%.

    High: 49 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.

    Low: 35 °F

    Rain Likely

  • Thursday

    Thursday: A chance of rain before 1pm, then a chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 50%.

    High: 38 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.

    Low: 20 °F

    Chance Snow

  • Friday

    Friday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 44. Northwest wind 7 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.
Tonight
Mostly clear, with a low around 29. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 47. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 38. Southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Wednesday
A chance of rain. Mostly cloudy, with a high near 49. Southwest wind 5 to 7 mph. Chance of precipitation is 30%.
Wednesday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.
Thursday
A chance of rain before 1pm, then a chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 50%.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 32.
Friday Night
Mostly clear, with a low around 22.
Saturday
Partly sunny, with a high near 40.
Saturday Night
Mostly cloudy, with a low around 22.
Sunday
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 77.09°W (Elev. 449 ft)
Last Update:
3:53 am EST Jan 12, 2026
Forecast Valid:
4am EST Jan 12, 2026-6pm EST Jan 18, 2026
 
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Additional Resources

Radar & Satellite Image

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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