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

Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains Thursday night, crossing the Midwest and reaching the Gulf Coast Friday night. Confidence continues to increase for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Overcast

55°F

13°C

Humidity 49%
Wind Speed N 9 G 23 mph
Barometer 30.20 in (1022.5 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 29 Jan 8:53 am EST
Extended Forecast for

Key Colony Beach FL

  • Today

    Today: A slight chance of showers. Sunny, with a high near 66. Northeast wind 10 to 15 mph. Chance of precipitation is 10%.

    High: 66 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A chance of showers. Partly cloudy, with a low around 62. Northeast wind around 10 mph. Chance of precipitation is 40%.

    Low: 62 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers. Partly sunny, with a high near 68. Northeast wind around 10 mph. Chance of precipitation is 40%.

    High: 68 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers. Mostly cloudy, with a low around 62. Northwest wind around 10 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Partly sunny, with a high near 68. Windy, with a west wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 50%.

    High: 68 °F

    Chance
    Showers and
    Windy

  • Saturday Night

    Saturday Night: A slight chance of showers. Mostly cloudy, with a low around 46. Windy. Chance of precipitation is 10%.

    Low: 46 °F

    Slight Chance
    Showers and
    Windy

  • Sunday

    Sunday: Mostly sunny, with a high near 55. Breezy.

    High: 55 °F

    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers. Sunny, with a high near 66. Northeast wind 10 to 15 mph. Chance of precipitation is 10%.
Tonight
A chance of showers. Partly cloudy, with a low around 62. Northeast wind around 10 mph. Chance of precipitation is 40%.
Friday
A chance of showers. Partly sunny, with a high near 68. Northeast wind around 10 mph. Chance of precipitation is 40%.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 62. Northwest wind around 10 mph. Chance of precipitation is 20%.
Saturday
A chance of showers. Partly sunny, with a high near 68. Windy, with a west wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 50%.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 46. Windy. Chance of precipitation is 10%.
Sunday
Mostly sunny, with a high near 55. Breezy.
Sunday Night
Mostly clear, with a low around 47.
Monday
Sunny, with a high near 59.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
A slight chance of showers. Sunny, with a high near 71. Chance of precipitation is 10%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.71°N 81.02°W (Elev. 0 ft)
Last Update:
9:15 am EST Jan 29, 2026
Forecast Valid:
9am EST Jan 29, 2026-6pm EST Feb 4, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation