Critical Fire Weather in the Southern High Plains; Heavy Snow in the Great Lakes and Northeast U.S.

Gusty winds and low relative humidity will bring elevated to critical fire weather conditions to the southern High Plains through the weekend. A winter storm will track across the Great Lakes and Northeast U.S. into Saturday with areas of wintry mix and heavy snow from northern New York through southern Maine. 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 69%
Wind Speed E 9 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 20 Feb 3:53 pm EST
Extended Forecast for

Marathon FL

  • This Afternoon

    This Afternoon: Sunny, with a high near 81. Southeast wind around 5 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 73. East wind 5 to 10 mph.

    Low: 73 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 82. Southeast wind around 5 mph.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70. Southeast wind around 5 mph becoming calm  in the evening.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers after 1pm.  Sunny, with a high near 82. West wind 5 to 15 mph.  Chance of precipitation is 10%.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers before 1am.  Partly cloudy, with a low around 57. Windy.  Chance of precipitation is 10%.

    Low: 57 °F

    Slight Chance
    Showers and
    Windy

  • Monday

    Monday: Sunny, with a high near 63. Windy.

    High: 63 °F

    Sunny and
    Windy

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. Breezy.

    Low: 50 °F

    Mostly Clear
    and Breezy

  • Tuesday

    Tuesday: Sunny, with a high near 60. Breezy.

    High: 60 °F

    Sunny and
    Breezy then
    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 81. Southeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 73. East wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 82. Southeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 70. Southeast wind around 5 mph becoming calm in the evening.
Sunday
A slight chance of showers after 1pm. Sunny, with a high near 82. West wind 5 to 15 mph. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 57. Windy. Chance of precipitation is 10%.
Monday
Sunny, with a high near 63. Windy.
Monday Night
Mostly clear, with a low around 50. Breezy.
Tuesday
Sunny, with a high near 60. Breezy.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Mostly sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
3:15 pm EST Feb 20, 2026
4pm EST Feb 20, 2026-6pm EST Feb 26, 2026
 
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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