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

Heavy Snow in the Cascades and Northern Rockies; Wintry Mix in the Northeast; High Winds in Southern California

Two more cold fronts will pass through the Northwest U.S. this week with heavy mountain snow continuing across the Cascades, and northern Rockies. A quick moving storm system will bring mixed precipitation including some freezing rain across the Northeast U.S. today. High winds could blow down trees and power lines in the mountains of southern California this evening through Thursday. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

79°F

26°C

Humidity 69%
Wind Speed Vrbl 5 mph
Barometer 30.02 in (1016.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 7 Jan 2:53 pm EST
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: Sunny, with a high near 79. Northeast wind around 5 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Northeast wind 5 to 10 mph.

    Low: 71 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers. Mostly sunny, with a high near 79. East wind around 10 mph. Chance of precipitation is 10%.

    High: 79 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 71. East wind around 10 mph.

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79. East wind 10 to 15 mph.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 10%.

    Low: 71 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers. Mostly sunny, with a high near 76. Chance of precipitation is 10%.

    High: 76 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 79. Northeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 71. Northeast wind 5 to 10 mph.
Thursday
A slight chance of showers. Mostly sunny, with a high near 79. East wind around 10 mph. Chance of precipitation is 10%.
Thursday Night
Mostly clear, with a low around 71. East wind around 10 mph.
Friday
Sunny, with a high near 79. East wind 10 to 15 mph.
Friday Night
Partly cloudy, with a low around 72.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 10%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 76. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 63. Chance of precipitation is 20%.
Monday
A slight chance of showers. Partly sunny, with a high near 73. Chance of precipitation is 20%.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 20%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 74. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
Last Update:
3:15 pm EST Jan 7, 2026
Forecast Valid:
3pm EST Jan 7, 2026-6pm EST Jan 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation