Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.

Dangerous Heat Wave To Persist From The Midwest to the Ohio Valley

A very hot and humid air mass will persist today across much of the Midwest and Ohio Valley. Afternoon high temperatures will exceed 95 degrees in many locations with heat index values between 100 and 110. Hot temperatures will expand into the eastern U.S. on Monday with several of the major I-95 cities reaching 90 degrees or higher. Take it slow, drink plenty of fluids and limit outdoor exposure. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 0ft.

A Few Clouds

85°F

29°C

Humidity 70%
Wind Speed E 6 mph
Barometer 30.05 in (1017.7 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 17 Jun 7:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • Tonight

    Tonight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 80. East wind around 10 mph.  Chance of precipitation is 30%.

    Chance
    Showers

    Low: 80 °F

  • Monday

    Monday: A chance of showers and thunderstorms.  Mostly cloudy, with a high near 87. East wind 5 to 10 mph.  Chance of precipitation is 50%.

    Chance
    T-storms

    High: 87 °F

  • Monday
    Night

    Monday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 79. Southeast wind around 5 mph.  Chance of precipitation is 40%.

    Chance
    Showers

    Low: 79 °F

  • Tuesday

    Tuesday: A chance of showers and thunderstorms.  Partly sunny, with a high near 88. East wind around 5 mph.  Chance of precipitation is 40%.

    Chance
    Showers

    High: 88 °F

  • Tuesday
    Night

    Tuesday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 79. Calm wind becoming southeast around 5 mph after midnight.  Chance of precipitation is 30%.

    Chance
    Showers

    Low: 79 °F

  • Wednesday

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

    Chance
    Showers

    High: 88 °F

  • Wednesday
    Night

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

    Chance
    Showers

    Low: 80 °F

  • Thursday

    Thursday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 88. Chance of precipitation is 30%.

    Chance
    Showers

    High: 88 °F

  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 80. Chance of precipitation is 30%.

    Chance
    Showers

    Low: 80 °F

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 80. East wind around 10 mph. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 87. East wind 5 to 10 mph. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 79. Southeast wind around 5 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. East wind around 5 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 79. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 79. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 79. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 30%.
Click Map For Forecast
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
7:15 pm EDT Jun 17, 2018
8pm EDT Jun 17, 2018-6pm EDT Jun 24, 2018
 
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