Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Marathon FL

  • This Afternoon

    This Afternoon: A chance of showers.  Partly sunny, with a high near 66. North wind around 10 mph.  Chance of precipitation is 40%.

    High: 66 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers, mainly before 7pm.  Mostly cloudy, with a low around 60. North wind around 10 mph.  Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely.  Partly sunny, with a high near 65. Windy, with a southwest wind 10 to 15 mph becoming northwest 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.  Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely and
    Windy

  • Saturday Night

    Saturday Night: A slight chance of showers.  Mostly cloudy, with a low around 43. Wind chill values as low as 36. Very windy, with a northwest wind 25 to 30 mph, with gusts as high as 45 mph.  Chance of precipitation is 20%.

    Low: 43 °F

    Slight Chance
    Showers and
    Very Windy

  • Sunday

    Sunday: Partly sunny, with a high near 55. Windy, with a northwest wind 20 to 25 mph, with gusts as high as 35 mph.

    High: 55 °F

    Partly Sunny
    and Windy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43. Breezy.

    Low: 43 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of showers. Partly sunny, with a high near 66. North wind around 10 mph. Chance of precipitation is 40%.
Tonight
A chance of showers, mainly before 7pm. Mostly cloudy, with a low around 60. North wind around 10 mph. Chance of precipitation is 30%.
Saturday
Showers likely. Partly sunny, with a high near 65. Windy, with a southwest wind 10 to 15 mph becoming northwest 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 60%.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 43. Wind chill values as low as 36. Very windy, with a northwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 20%.
Sunday
Partly sunny, with a high near 55. Windy, with a northwest wind 20 to 25 mph, with gusts as high as 35 mph.
Sunday Night
Partly cloudy, with a low around 43. Breezy.
Monday
Sunny, with a high near 57.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Mostly sunny, with a high near 62.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 66. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 59. Chance of precipitation is 10%.
Thursday
A slight chance of showers. Mostly sunny, with a high near 66. Breezy. Chance of precipitation is 10%.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 56. Windy. Chance of precipitation is 10%.
Friday
Mostly sunny, with a high near 63.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
5:15 pm EST Jan 30, 2026
5pm EST Jan 30, 2026-6pm EST Feb 6, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database