Early Spring Heat Wave in the Southwest U.S.; Critical Fire Weather in the Central Rockies and Plains

An unusual early Spring heat wave will continue much above-normal temperatures over the Southwest U.S. through early next week. Periods of critical fire weather will persist from the central Rockies to the central Plains through the weekend as gusty winds and low relative humidity continue. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

66°F

19°C

Humidity 84%
Wind Speed N 14 G 28 mph
Barometer 30.01 in (1016.0 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 20 Mar 2:53 am EDT
Extended Forecast for

Key Colony Beach FL

  • Overnight

    Overnight: A slight chance of showers.  Mostly clear, with a low around 66. North wind around 15 mph.  Chance of precipitation is 10%.

    Low: 66 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers.  Sunny, with a high near 74. Breezy, with a north wind 15 to 20 mph.  Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. Northeast wind around 15 mph.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75. North wind 10 to 15 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 69. Northeast wind 5 to 10 mph.

    Low: 69 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Overnight
A slight chance of showers. Mostly clear, with a low around 66. North wind around 15 mph. Chance of precipitation is 10%.
Friday
A slight chance of showers. Sunny, with a high near 74. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 65. Northeast wind around 15 mph.
Saturday
Sunny, with a high near 75. North wind 10 to 15 mph.
Saturday Night
Mostly clear, with a low around 69. Northeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 76.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
A slight chance of showers. Sunny, with a high near 77. Chance of precipitation is 10%.
Wednesday Night
Mostly clear, with a low around 71.
Thursday
A slight chance of showers. Sunny, with a high near 77. 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)
2:15 am EDT Mar 20, 2026
3am EDT Mar 20, 2026-6pm EDT Mar 26, 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