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

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

82°F

28°C

Humidity 85%
Wind Speed NE 7 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 13 Oct 5:53 am EDT
Extended Forecast for

Marathon FLSimilar City Names

  • Overnight

    Overnight: A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Northeast wind around 10 mph. Chance of precipitation is 30%.

    Low: 80 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, mainly before 8am. Sunny, with a high near 88. Northeast wind around 10 mph. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 79. Northeast wind around 15 mph. Chance of precipitation is 20%.

    Low: 79 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Northeast wind around 10 mph. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 80. East wind around 15 mph. Chance of precipitation is 30%.

    Low: 80 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms. Sunny, with a high near 89. Chance of precipitation is 40%.

    High: 89 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 81. Chance of precipitation is 30%.

    Low: 81 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 79. Chance of precipitation is 40%.

    Low: 79 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Northeast wind around 10 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms, mainly before 8am. Sunny, with a high near 88. Northeast wind around 10 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 79. Northeast wind around 15 mph. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Northeast wind around 10 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. East wind around 15 mph. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Sunny, with a high near 89. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 81. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 79. Chance of precipitation is 40%.
Saturday
Showers and possibly a thunderstorm. High near 86. Chance of precipitation is 80%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 78. Chance of precipitation is 70%.
Sunday
Showers and possibly a thunderstorm. High near 86. Breezy. Chance of precipitation is 90%.
Sunday Night
Showers and possibly a thunderstorm. Low around 78. Breezy. Chance of precipitation is 80%.
Monday
Showers and possibly a thunderstorm. High near 86. Breezy. Chance of precipitation is 80%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marathon FLSimilar City Names
 24.72°N 81.07°W (Elev. 7 ft)
Last Update:
5:15 am EDT Oct 13, 2026
Forecast Valid:
5am EDT Oct 13, 2026-6pm EDT Oct 19, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation