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

Fire Weather Concerns in the Intermountain West into the Plains

Anomalously warm, dry and breezy conditions will bring elevated to critical fire weather conditions across portions of the Intermountain West into the Plains though early this week. Another elevated risk is possible across the central Appalachians. A rapid warm-up is in the forecast beginning Monday across the central and eastern U.S.. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

77°F

25°C

Humidity 64%
Wind Speed E 13 G 21 mph
Barometer 30.16 in (1021.2 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 29 Mar 7:53 pm EDT
Extended Forecast for

Marathon FL

  • Tonight

    Tonight: A chance of showers. Partly cloudy, with a low around 73. East wind around 15 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers

  • Monday

    Monday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. East wind around 15 mph. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 74. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 30%.

    Low: 74 °F

    Chance
    Showers and
    Breezy

  • Tuesday

    Tuesday: A chance of showers. Mostly sunny, with a high near 82. East wind around 15 mph. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly cloudy, with a low around 74. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 10%.

    Low: 74 °F

    Slight Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: A slight chance of showers. Mostly cloudy, with a high near 82. Chance of precipitation is 10%.

    High: 82 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Chance of precipitation is 30%.

    High: 81 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers. Mostly cloudy, with a low around 73. Breezy. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Tonight
A chance of showers. Partly cloudy, with a low around 73. East wind around 15 mph. Chance of precipitation is 30%.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. East wind around 15 mph. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 74. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers. Mostly sunny, with a high near 82. East wind around 15 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 74. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 82. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 73. Breezy. Chance of precipitation is 30%.
Friday
A slight chance of showers. Mostly sunny, with a high near 80. Breezy. Chance of precipitation is 20%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 73. Breezy. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 10%.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 73. Chance of precipitation is 20%.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
Last Update:
8:15 pm EDT Mar 29, 2026
Forecast Valid:
8pm EDT Mar 29, 2026-6pm EDT Apr 5, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation