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

Atmospheric River to Begin to Impact the Northwest U.S.; Gusty Winds in the Northeast U.S.

A strong atmospheric river moving into northern California later Tuesday will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through at least Wednesday. Gusty winds and isolated rain and snow showers will continue in the Northeast U.S. Tuesday behind a cold front. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

74°F

23°C

Humidity 85%
Wind Speed NE 10 G 22 mph
Barometer 30.09 in (1018.8 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 4 Nov 2:53 am EST
Extended Forecast for

Marathon FLSimilar City Names

  • Overnight

    Overnight: A slight chance of showers. Mostly cloudy, with a low around 74. Northeast wind around 15 mph. Chance of precipitation is 10%.

    Low: 74 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers before 7am. Mostly cloudy, with a high near 80. Northeast wind around 15 mph. Chance of precipitation is 10%.

    High: 80 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 74. Northeast wind around 15 mph.

    Low: 74 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 82. East wind around 15 mph.

    High: 82 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 74. East wind 10 to 15 mph.

    Low: 74 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 82.

    High: 82 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A slight chance of showers. Mostly cloudy, with a low around 75. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 20%.

    High: 83 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers. Partly cloudy, with a low around 76. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
A slight chance of showers. Mostly cloudy, with a low around 74. Northeast wind around 15 mph. Chance of precipitation is 10%.
Tuesday
A slight chance of showers before 7am. Mostly cloudy, with a high near 80. Northeast wind around 15 mph. Chance of precipitation is 10%.
Tuesday Night
Mostly cloudy, with a low around 74. Northeast wind around 15 mph.
Wednesday
Mostly cloudy, with a high near 82. East wind around 15 mph.
Wednesday Night
Mostly cloudy, with a low around 74. East wind 10 to 15 mph.
Thursday
Mostly cloudy, with a high near 82.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 75. Chance of precipitation is 20%.
Friday
A slight chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 20%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 76. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Sunny, with a high near 85. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers. Mostly clear, with a low around 76. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Sunny, with a high near 84. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers. Mostly clear, with a low around 75. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FLSimilar City Names
 24.72°N 81.07°W (Elev. 7 ft)
Last Update:
3:24 am EST Nov 4, 2025
Forecast Valid:
3am EST Nov 4, 2025-6pm EST Nov 10, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation