Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains tonight, crossing the Midwest and reaching the Gulf Coast Friday night. Dangerously cold temperatures will persist across the eastern U.S. into early February. There is increasing confidence 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

63°F

17°C

Humidity 70%
Wind Speed N 6 mph
Barometer 30.08 in (1018.7 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 29 Jan 5:53 pm EST
Extended Forecast for

Key Colony Beach FL

  • Tonight

    Tonight: A chance of showers, mainly after 7pm.  Mostly cloudy, with a low around 62. Northeast wind 10 to 15 mph.  Chance of precipitation is 40%.

    Low: 62 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers.  Mostly cloudy, with a high near 67. Northeast wind 10 to 15 mph.  Chance of precipitation is 50%.

    High: 67 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers.  Mostly cloudy, with a low around 60. North wind 10 to 15 mph.  Chance of precipitation is 20%.

    Low: 60 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Showers likely.  Partly sunny, with a high near 67. Windy, with a northwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.  Chance of precipitation is 60%.

    High: 67 °F

    Showers
    Likely and
    Windy

  • Saturday Night

    Saturday Night: A slight chance of showers.  Mostly cloudy, with a low around 43. Very windy, with a northwest wind around 30 mph, with gusts as high as 40 mph.  Chance of precipitation is 20%.

    Low: 43 °F

    Slight Chance
    Showers and
    Very Windy

  • Sunday

    Sunday: A slight chance of showers.  Partly sunny, with a high near 53. Windy.  Chance of precipitation is 10%.

    High: 53 °F

    Slight Chance
    Showers and
    Windy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43. Breezy.

    Low: 43 °F

    Partly Cloudy
    and Breezy

  • Monday

    Monday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers, mainly after 7pm. Mostly cloudy, with a low around 62. Northeast wind 10 to 15 mph. Chance of precipitation is 40%.
Friday
A chance of showers. Mostly cloudy, with a high near 67. Northeast wind 10 to 15 mph. Chance of precipitation is 50%.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 60. North wind 10 to 15 mph. Chance of precipitation is 20%.
Saturday
Showers likely. Partly sunny, with a high near 67. Windy, with a northwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 60%.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 43. Very windy, with a northwest wind around 30 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Partly sunny, with a high near 53. Windy. Chance of precipitation is 10%.
Sunday Night
Partly cloudy, with a low around 43. Breezy.
Monday
Mostly sunny, with a high near 58.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 67. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 63. Chance of precipitation is 10%.
Thursday
A slight chance of showers. Mostly sunny, with a high near 69. Chance of precipitation is 10%.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
6:15 pm EST Jan 29, 2026
6pm EST Jan 29, 2026-6pm EST Feb 5, 2026
 
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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