Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds in the North-Central U.S.

A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall which has lead to areas of urban and river flooding along with gusty winds into Thursday. A clipper will bring heavy snow, some mixed wintry precipitation, and gusty to high winds across the northern Plains, Upper Midwest, and the Great Lakes into Thursday morning. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Overcast

76°F

24°C

Humidity 85%
Wind Speed NE 8 mph
Barometer 29.91 in (1012.9 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 9 Dec 2:53 pm EST
Extended Forecast for

Marathon FL

  • This Afternoon

    This Afternoon: Showers likely.  Mostly cloudy, with a high near 78. Northeast wind around 15 mph.  Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers likely, mainly before 7pm.  Mostly cloudy, with a low around 70. Northeast wind 10 to 15 mph.  Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A slight chance of showers.  Partly sunny, with a high near 78. North wind around 5 mph.  Chance of precipitation is 10%.

    High: 78 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers.  Partly cloudy, with a low around 66. Northwest wind 5 to 10 mph.  Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 76. North wind 5 to 10 mph.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers.  Mostly cloudy, with a low around 71. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers.  Mostly cloudy, with a high near 80. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Showers likely. Mostly cloudy, with a high near 78. Northeast wind around 15 mph. Chance of precipitation is 60%.
Tonight
Showers likely, mainly before 7pm. Mostly cloudy, with a low around 70. Northeast wind 10 to 15 mph. Chance of precipitation is 60%.
Wednesday
A slight chance of showers. Partly sunny, with a high near 78. North wind around 5 mph. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 66. Northwest wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 76. North wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 68.
Friday
Mostly sunny, with a high near 78.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 71. Chance of precipitation is 20%.
Saturday
A chance of showers. Mostly cloudy, with a high near 80. Chance of precipitation is 30%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 72. Chance of precipitation is 30%.
Sunday
A chance of showers. Partly sunny, with a high near 79. Chance of precipitation is 30%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 70. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
3:15 pm EST Dec 9, 2025
3pm EST Dec 9, 2025-6pm EST Dec 15, 2025
 
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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