Key Largo weather in December 2026

Q: How hot is it in Key Largo in December?

Daytime temperatures usually reach 24°C in Key Largo in December, falling to 17°C at night.

Q: How sunny is it in Key Largo in December?

There are normally 7 hours of bright sunshine each day in Key Largo in December - that's 66% of daylight hours.

Q: How warm is the sea around Key Largo in December?

The average sea temperature around Key Largo in December is 25°C.

Q: Does it rain in Key Largo in December?

There are usually 6 days with some rain in Key Largo in December and the average monthly rainfall is 43mm.

Expect daytime maximum temperatures of 77°F in Key Largo, Florida in December based on long-term weather averages. There are 7 hours of sunshine per day on average.

77
77°F max day temperature
7
7 hours of sunshine per day
6
6 days with some rainfall
59
59°F min night temperature
11
11 hours of daylight per day
L
Low heat & humidity
1.4
1.4 inches of monthly rainfall
5
5 (Moderate) UV index
77
77°F sea temperature

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The December weather guide for Florida (Key Largo) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)