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

52°F

11°C

Humidity 55%
Wind Speed S 8 mph
Barometer 30.05 in (1018.8 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 26 Mar 2:56 am EDT
Extended Forecast for

Olney MD

  • Overnight

    Overnight: Mostly cloudy, with a low around 47. South wind around 10 mph.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 76. Southwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of rain and thunderstorms, mainly after 5am. Increasing clouds, with a low around 49. Southwest wind 11 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 49 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain. High near 59. North wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 59 °F

    Rain

  • Friday Night

    Friday Night: Rain likely, mainly before 8pm. Mostly cloudy, with a low around 32. North wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 32 °F

    Rain Likely
    then Slight
    Chance Rain

  • Saturday

    Saturday: Sunny, with a high near 46.

    High: 46 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 47. South wind around 10 mph.
Thursday
Mostly sunny, with a high near 76. Southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Thursday Night
A chance of rain and thunderstorms, mainly after 5am. Increasing clouds, with a low around 49. Southwest wind 11 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Friday
Rain. High near 59. North wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain likely, mainly before 8pm. Mostly cloudy, with a low around 32. North wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Saturday
Sunny, with a high near 46.
Saturday Night
Mostly clear, with a low around 31.
Sunday
Sunny, with a high near 57.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Partly sunny, with a high near 64.
Monday Night
A chance of rain. Mostly cloudy, with a low around 51. Chance of precipitation is 30%.
Tuesday
A chance of rain. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Wednesday
A chance of rain. Partly sunny, with a high near 74. Chance of precipitation is 40%.
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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:
2:26 am EDT Mar 26, 2026
Forecast Valid:
3am EDT Mar 26, 2026-6pm EDT Apr 1, 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