National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

52°F

11°C

Humidity 40%
Wind Speed S 15 G 23 mph
Barometer 29.72 in (1008.2 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 13 Mar 6:56 pm EDT
Extended Forecast for

Olney MD

  • Tonight

    Tonight: Mostly clear, with a low around 40. West wind 10 to 18 mph, with gusts as high as 36 mph.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 54. West wind 11 to 17 mph, with gusts as high as 31 mph.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38. North wind around 5 mph becoming calm.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 57. Southeast wind 7 to 15 mph, with gusts as high as 25 mph.

    High: 57 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain. Low around 51. Southeast wind 11 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%.

    Low: 51 °F

    Rain Likely
    then Rain

  • Monday

    Monday: Rain before 8am, then showers likely between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 68. Breezy. Chance of precipitation is 100%.

    High: 68 °F

    Showers and
    Breezy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 8pm, then showers likely between 8pm and 2am. Low around 29. Breezy. Chance of precipitation is 80%.

    Low: 29 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 22.

    Low: 22 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 40. West wind 10 to 18 mph, with gusts as high as 36 mph.
Saturday
Sunny, with a high near 54. West wind 11 to 17 mph, with gusts as high as 31 mph.
Saturday Night
Mostly cloudy, with a low around 38. North wind around 5 mph becoming calm.
Sunday
Mostly cloudy, with a high near 57. Southeast wind 7 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Rain. Low around 51. Southeast wind 11 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%.
Monday
Rain before 8am, then showers likely between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 68. Breezy. Chance of precipitation is 100%.
Monday Night
Showers and possibly a thunderstorm before 8pm, then showers likely between 8pm and 2am. Low around 29. Breezy. Chance of precipitation is 80%.
Tuesday
Mostly sunny, with a high near 37.
Tuesday Night
Mostly clear, with a low around 22.
Wednesday
Partly sunny, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Partly cloudy, with a low around 36.
Friday
Mostly sunny, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Olney MD
 39.14°N 77.1°W (Elev. 449 ft)
Last Update:
4:53 pm EDT Mar 13, 2026
Forecast Valid:
7pm EDT Mar 13, 2026-6pm EDT Mar 20, 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