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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

64°F

18°C

Humidity NA
Wind Speed Calm
Barometer 30.12 in (1020.8 mb)
Dewpoint N/A
Visibility 10.00 mi
Last update 3 Oct 12:56 am EDT
Extended Forecast for

Olney MDSimilar City Names

  • Overnight

    Overnight: A chance of showers, mainly before 2am. Mostly cloudy, with a low around 57. North wind around 8 mph. Chance of precipitation is 30%.

    Low: 57 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers between 11am and noon. Cloudy, then gradually becoming mostly sunny, with a high near 69. North wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 5am. Increasing clouds, with a low around 57. Light east wind. Chance of precipitation is 30%.

    Low: 57 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers, mainly between 8am and 2pm. High near 64. East wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers before 8pm. Cloudy, with a low around 57. Calm wind. Chance of precipitation is 30%.

    Low: 57 °F

    Chance
    Showers then
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 43.

    Low: 43 °F

    Clear

Detailed Forecast

Overnight
A chance of showers, mainly before 2am. Mostly cloudy, with a low around 57. North wind around 8 mph. Chance of precipitation is 30%.
Saturday
A slight chance of showers between 11am and noon. Cloudy, then gradually becoming mostly sunny, with a high near 69. North wind 6 to 8 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers after 5am. Increasing clouds, with a low around 57. Light east wind. Chance of precipitation is 30%.
Sunday
Showers, mainly between 8am and 2pm. High near 64. East wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A chance of showers before 8pm. Cloudy, with a low around 57. Calm wind. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 69.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Clear, with a low around 43.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 69.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
Olney MDSimilar City Names
 39.14°N 77.1°W (Elev. 449 ft)
Last Update:
10:52 pm EDT Oct 2, 2026
Forecast Valid:
1am EDT Oct 3, 2026-6pm EDT Oct 9, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation