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
Low: 66 °F
Slight Chance
ShowersFriday
High: 74 °F
Slight Chance
Showers and
BreezyFriday Night
Low: 65 °F
Mostly Clear
Saturday
High: 75 °F
Sunny
Saturday Night
Low: 69 °F
Mostly Clear
Sunday
High: 76 °F
Sunny
Sunday Night
Low: 70 °F
Mostly Clear
Monday
High: 76 °F
Sunny
Monday Night
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%.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Key Colony Beach FL
24.74°N 81.02°W (Elev. 0 ft)
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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