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      Elev 16 ft, 24.695 °N 81.082 °W

      Marathon, FL

      Marathon Station86°
      Updated: 8:40 PM EDT on September 16, 2026 (GMT -4)
      5 minutes ago
      91°
      78°
      86
      Feels Like 97
      Clear
      N
      10
      Lower temperature is expected tomorrow
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Wed 09/16
        Low 82°f
         33% Precip. / 0.02 in
        Partly cloudy this evening followed by mostly cloudy skies and a few showers after midnight. Low 82F. Winds ENE at 10 to 20 mph. Chance of rain 30%.
        Tomorrow
        Thu 09/17
        High 87°f
         48% Precip. / 0.42 in
        Scattered thunderstorms. High 87F. Winds ENE at 10 to 20 mph. Chance of rain 50%.
        Tomorrow night
        Thu 09/17
        Low 81°f
         39% Precip. / 0.2 in
        Mostly cloudy in the evening with scattered thunderstorms developing after midnight. Low 81F. Winds ENE at 10 to 20 mph. Chance of rain 40%.
        Hourly Forecast
        Now
        86°
        9PM
        86°
        10PM
        86°
        11PM
        85°
        12AM
        84°
        1AM
        84°
        2AM
        83°
        3AM
        83°
        4AM
        84°
        5AM
        33%
        84°
        6AM
        84°
        7AM
        83°
        7:11AM
        Sunrise
        8AM
        83°
        9AM
        85°
        10AM
        86°
        11AM
        41%
        86°
        12PM
        41%
        86°
        1PM
        37%
        86°
        2PM
        43%
        86°
        3PM
        49%
        86°
        4PM
        38%
        86°
        5PM
        38%
        86°
        6PM
        86°
        7PM
        85°
        7:26PM
        Sunset
        8PM
        84°
        Precipitation
        49%
        Pollen
        None
        Air Quality
        24
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.04 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point76°F
        5. Humidity 73%
        6. Rainfall 0.12 in
        7. Snow Depth 0 in
         KMTH Station History
        Almanac for
        1. Forecast Average Record
        2. Temperature
        3. High 91°F -°F -°F
        4. Low 78°F -°F -°F
        5. Rain/Snow Depth
        6. Precipitation 0.02 in - in -
        7. Snow 0 in - in -
        Almanac for
        1. Forecast Average Record
        2. Temperature
        3. High 87°F -°F -°F
        4. Low 78°F -°F -°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:11 AM 7:25 PM
        3. Civil Twilight 6:48 AM 7:48 PM
        4. Nautical Twilight 6:21 AM 8:15PM
        5. Astronomical Twilight 5:55 AM 8:42 PM
        1. Length of Visible Light 13h 0m
        2. Length of Day 12h 14m
        3. Tomorrow will be 1 minute 25 seconds shorter
        1. Moon 1:13 PM 11:43 PM
        2. Waxing Crescent39% of the Moon is Illuminated
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Precipitation
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