Key West weather in December 2026

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

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

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

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

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

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

Q: Does it rain in Key West in December?

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

Expect daytime maximum temperatures of 24°C in Key West, Florida in December based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 45 mm of rainfall in the month.

24
24°C max day temperature
7
7 hours of sunshine per day
6
6 days with some rainfall
18
18°C min night temperature
11
11 hours of daylight per day
L
Low heat & humidity
45
45 mm of monthly rainfall
6
6 (High) UV index
24
24°C sea temperature

More about Key West

Key West by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Florida

TUI: Top deals & discounts on 2026/2027 holidays

Sale

Explore latest special offers & online deals from TUI
Free child places & £0 deposits with direct debit available
Book summer & winter sun holidays in 2026/2027

Go to TUI deal >>

View all TUI offers

TUI deal finder

Destination

The December weather guide for Florida (Key West) 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 / mm) | Imperial (°F / inches)