Florida Keys Weather in December
December in Florida Keys averages 25°C (77°F) during the day and 19°C (66°F) at night. Quite a bit of rainfall is typical this month, with around 61 mm (2.4 in) on average. An umbrella is a good idea.
Rainfall in Florida Keys in December
Analyzing past climate data, one can expect approximately 11 days of rain, averaging 61 mm (2.4 in). Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Florida Keys in December
The perfect temperature in Florida Keys in December makes it a solid month to visit, with 25°C (77°F) during the day and 19°C (66°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows of 19°C (66°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Florida Keys in December
With approximately 235 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.If your ideal day consists of dry skies and pleasant temperatures, January, February, March, April, May, November and December typically offer the best circumstances for Florida Keys.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Florida Keys's climate page.
Florida Keys Temperature in December
Min Temperature
19°C (66°F)
Max Temperature
25°C (77°F)
Chance of Rain
37%
Precipitation
61 mm (2.4 in)
Rainy days
11 days
Humidity
76%
Sunshine
235 hours
Percentage Sunshine
71%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Florida Keys typically stay consistent throughout December, with daily highs averaging around 25°C (77°F). Nights are pleasant, with lows typically ranging from 16°C (61°F) to 19°C (66°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Florida Keys in December
Browse day-by-day weather records for Florida Keys spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Florida Keys historical weather extremes in December
Based on weather observations in Florida Keys between 2011 and 2025, these are the recorded extremes during December.
- The warmest day in December was on December 3, 2018, with a maximum of 30°C (86°F).
- Florida Keys experienced its chilliest December day on December 25, 2022, reaching only 10°C (50°F).
- The coldest night in December in Florida Keys was on December 14, 2017, with a minimum of 7°C (45°F).
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
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What to Wear in Florida Keys in December
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Florida Keys in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Florida Keys's climate page.
Temperature Rainfall Sunshine Humidity
See the full Florida Keys climate overview or explore weather in the United States of America.
