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

Record Temperatures Expected Across the Southern US; Fire Weather Concerns in the Central US

Unseasonably warm temperatures continue today across the southern U.S., with more than 100 record or near record maximum temperatures forecast through the rest of the week and over the weekend. Dry and gusty winds will produce elevated to critical fire weather in the central and southern Plains and elevated conditions over portions of the Desert Southwest on Friday. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

73°F

23°C

Humidity 81%
Wind Speed E 5 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 27 Mar 4:53 am EDT
Extended Forecast for

Marathon FL

  • Overnight

    Overnight: Partly cloudy, with a low around 72. East wind around 10 mph.

    Low: 72 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers. Sunny, with a high near 82. East wind around 10 mph. Chance of precipitation is 10%.

    High: 82 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers. Mostly clear, with a low around 73. East wind around 10 mph. Chance of precipitation is 10%.

    Low: 73 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers. Sunny, with a high near 82. Northeast wind 5 to 10 mph. Chance of precipitation is 10%.

    High: 82 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers. Mostly clear, with a low around 73. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers. Sunny, with a high near 81. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers. Mostly clear, with a low around 72. Breezy. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    Showers and
    Breezy

  • Monday

    Monday: A slight chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers. Partly cloudy, with a low around 72. Breezy. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    Showers and
    Breezy

Detailed Forecast

Overnight
Partly cloudy, with a low around 72. East wind around 10 mph.
Friday
A slight chance of showers. Sunny, with a high near 82. East wind around 10 mph. Chance of precipitation is 10%.
Friday Night
A slight chance of showers. Mostly clear, with a low around 73. East wind around 10 mph. Chance of precipitation is 10%.
Saturday
A slight chance of showers. Sunny, with a high near 82. Northeast wind 5 to 10 mph. Chance of precipitation is 10%.
Saturday Night
A slight chance of showers. Mostly clear, with a low around 73. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Sunny, with a high near 81. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers. Mostly clear, with a low around 72. Breezy. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 72. Breezy. Chance of precipitation is 20%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 80. Breezy. Chance of precipitation is 10%.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 72. Breezy. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 80. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 72. Chance of precipitation is 20%.
Thursday
A slight chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 10%.
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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:
5:15 am EDT Mar 27, 2026
Forecast Valid:
5am EDT Mar 27, 2026-6pm EDT Apr 2, 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