Significant and Catastrophic Flooding in the Pacific Northwest; Very Cold Temperatures in the Northern Plains

The atmospheric river over the Pacific Northwest will begin to subside today, but lingering rainfall will exacerbate ongoing catastrophic major river flooding, and landslides will continue across portions of western Washington and northwest Oregon for several days. Arctic air will plummet southward into the Northern Plains today, bringing cold air in the single digits to the region by Friday. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

72°F

22°C

Humidity 71%
Wind Speed Vrbl 6 mph
Barometer 30.03 in (1016.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 11 Dec 12:53 pm EST
Extended Forecast for

Long Key FL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 74. North wind around 10 mph.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 69. North wind 5 to 10 mph.

    Low: 69 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 76. East wind around 10 mph.

    High: 76 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers.  Partly cloudy, with a low around 72. East wind around 10 mph.  Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers.  Partly sunny, with a high near 78. East wind around 10 mph.  Chance of precipitation is 30%.

    High: 78 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms.  Cloudy, with a low around 72. Chance of precipitation is 50%.

    Low: 72 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers.  Mostly cloudy, with a high near 77. Chance of precipitation is 40%.

    High: 77 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers.  Partly cloudy, with a low around 67. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Monday

    Monday: A slight chance of showers.  Mostly sunny, with a high near 75. Chance of precipitation is 10%.

    High: 75 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 74. North wind around 10 mph.
Tonight
Partly cloudy, with a low around 69. North wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 76. East wind around 10 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 72. East wind around 10 mph. Chance of precipitation is 10%.
Saturday
A chance of showers. Partly sunny, with a high near 78. East wind around 10 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Cloudy, with a low around 72. Chance of precipitation is 50%.
Sunday
A chance of showers. Mostly cloudy, with a high near 77. Chance of precipitation is 40%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly sunny, with a high near 75. Chance of precipitation is 10%.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 10%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 75. Chance of precipitation is 10%.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 70. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 77. Chance of precipitation is 10%.
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ABOUT THIS FORECAST

 
Point Forecast:
Long Key FL
 24.83°N 80.81°W (Elev. 0 ft)
1:01 pm EST Dec 11, 2025
1pm EST Dec 11, 2025-6pm EST Dec 17, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database