Spanish Harbor Key Weather Forecast
- 75
- 80
Partly Sunny
- 76
- 81
Partly Sunny
- 74
- 82
Chance Rain Showers
- 68
- 80
Chance Rain Showers
- 67
- 75
Mostly Cloudy
- 69
- 75
Partly Sunny
Today 5 Dec Monroe Lower Keys
Mostly sunny. Highs in the lower 80s. East to southeast Winds 5 to 10 Mph.
Tonight 5 Dec Monroe Lower Keys
Partly cloudy. Lows in the mid 70s. Southeast Winds near 5 Mph.
Spanish Harbor Key Temperature Statistics
December Temperature
The Florida Keys - Marathon International Airport (16.8 miles)
Lowest 2 December, 2025
75.9 °FAverage December
79.2 °FHighest 1 December, 2025
82 °F
Climate (2020–Present)
The Florida Keys - Marathon International Airport (16.8 miles)
Average Low 2020–2025
75.3 °FAverage 2020–2025
80 °FAverage High 2020–2025
85.1 °F