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

Fire Weather Concerns and Severe Weather

Dry and breezy conditions will bring elevated to critical fire weather conditions across portions of the northern and central High Plains through this weekend, where fuels remain largely receptive. Severe thunderstorms and heavy rainfall are possible from the Plains into the Upper Midwest, as well as in the Ohio Valley and portions of the Mid-Atlantic through this weekend. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

64°F

18°C

Humidity NA
Wind Speed Calm
Barometer 30.08 in (1019.5 mb)
Dewpoint N/A
Visibility 10.00 mi
Last update 12 Sep 12:56 am EDT
Extended Forecast for

Olney MD

  • Overnight

    Overnight: Mostly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms, mainly between 2pm and 5pm. Mostly cloudy, with a high near 81. Light east wind becoming southeast 5 to 10 mph in the morning. Chance of precipitation is 30%.

    High: 81 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and thunderstorms before 4am, then showers and possibly a thunderstorm, mainly after 4am. Patchy fog between 11pm and 5am. Low around 68. Southeast wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 68 °F

    Showers and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers and thunderstorms before 2pm. Patchy fog between 7am and 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 83. Light and variable wind becoming west around 6 mph in the morning. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66. Calm wind becoming west around 5 mph after midnight.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 65. Calm wind.
Saturday
A chance of showers and thunderstorms, mainly between 2pm and 5pm. Mostly cloudy, with a high near 81. Light east wind becoming southeast 5 to 10 mph in the morning. Chance of precipitation is 30%.
Saturday Night
Showers and thunderstorms before 4am, then showers and possibly a thunderstorm, mainly after 4am. Patchy fog between 11pm and 5am. Low around 68. Southeast wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
A chance of showers and thunderstorms before 2pm. Patchy fog between 7am and 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 83. Light and variable wind becoming west around 6 mph in the morning. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 66. Calm wind becoming west around 5 mph after midnight.
Monday
Mostly sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
A chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Friday
A slight chance of showers. Mostly sunny, with a high near 78. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Olney MD
 39.16°N 77.06°W (Elev. 486 ft)
Last Update:
10:53 pm EDT Sep 11, 2026
Forecast Valid:
1am EDT Sep 12, 2026-6pm EDT Sep 18, 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