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

Severe Thunderstorms in Portions of the Mississippi Valley and Great Lakes

A few severe thunderstorms with large hail, are expected across parts of the middle and upper Mississippi River Valley tonight through early morning. Snow and a wintry mix overnight in the Upper Midwest into the Great Lakes can cause hazardous travel conditions. Fire weather concerns continue for a large portion of the central and southern High Plains and Four Corners region this evening. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

A Few Clouds

75°F

24°C

Humidity 79%
Wind Speed E 14 G 28 mph
Barometer 30.15 in (1020.7 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 31 Mar 4:53 am EDT
Extended Forecast for

Marathon FLSimilar City Names

  • Overnight

    Overnight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Breezy, with an east wind around 20 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    Showers and
    Breezy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 8am, then a slight chance of showers. Mostly sunny, with a high near 82. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Partly cloudy, with a low around 73. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: A slight chance of showers. Mostly sunny, with a high near 82. East wind around 15 mph. 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 74. East wind around 15 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 30%.

    Low: 74 °F

    Chance
    Showers

  • Friday

    Friday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers. Partly cloudy, with a low around 73. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Breezy, with an east wind around 20 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms before 8am, then a slight chance of showers. Mostly sunny, with a high near 82. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 73. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 82. East wind around 15 mph. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 74. East wind around 15 mph. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 30%.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 20%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 73. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 73. Chance of precipitation is 10%.
Sunday
Sunny, with a high near 80.
Sunday Night
Mostly clear, with a low around 72.
Monday
Sunny, with a high near 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 Mar 31, 2026
Forecast Valid:
5am EDT Mar 31, 2026-6pm EDT Apr 6, 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