Sea Temperature in Key West in December

Complete information on the sea temperature range in the Gulf of Mexico (Gulf of America) in Key West in December. Historical daily data. Climate details for December. Tips on swimming conditions and beach relaxation in Key West. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature Range in Key West in December

21°C

MINIMUN

24°C

AVERAGE

27°C

MAXIMUM

Historical Data of Water Temperature in December in Key West

Water Temperature Chart for Gulf of Mexico (Gulf of America) in Key West in December

Sea Temperature Table in Key West in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	25°C	24°C	26°C	25.3°C
Dec 2	25°C	24°C	26°C	25.0°C
Dec 3	24°C	25°C	26°C	25.3°C
Dec 4	23°C	25°C	25°C	24.8°C
Dec 5	23°C	26°C	27°C	25.5°C
Dec 6	23°C	25°C	26°C	25.0°C
Dec 7	23°C	26°C	25°C	24.8°C
Dec 8	22°C	23°C	24°C	23.5°C
Dec 9	22°C	22°C	24°C	23.3°C
Dec 10	23°C	24°C	25°C	24.5°C
Dec 11	22°C	24°C	25°C	24.3°C
Dec 12	23°C	24°C	25°C	24.5°C
Dec 13	24°C	25°C	25°C	24.8°C
Dec 14	22°C	24°C	25°C	24.3°C
Dec 15	22°C	23°C	24°C	23.8°C
Dec 16	22°C	23°C	25°C	24.0°C
Dec 17	22°C	24°C	25°C	24.0°C
Dec 18	22°C	23°C	25°C	23.8°C
Dec 19	22°C	24°C	25°C	24.3°C
Dec 20	24°C	23°C	24°C	24.3°C
Dec 21	23°C	23°C	24°C	24.3°C
Dec 22	21°C	22°C	24°C	23.3°C
Dec 23	22°C	22°C	25°C	23.5°C
Dec 24	21°C	22°C	25°C	23.3°C
Dec 25	21°C	22°C	24°C	23.0°C
Dec 26	22°C	22°C	24°C	23.0°C
Dec 27	22°C	23°C	24°C	23.5°C
Dec 28	22°C	23°C	23°C	23.3°C
Dec 29	23°C	23°C	22°C	23.3°C
Dec 30	22°C	23°C	22°C	23.0°C

Key West Climate and Swimming Opportunities in December

24°C

Average Day Air Temperature

17°C

Average Night Air Temperature

42 mm

Precipitation Amount per Month

7 days

Number of Rainy Days

10 hrs

Daylight
per Day

7 hrs

Sunshine
per Day

18 km/h

Average Wind Speed

75%

Average
humidity

Key West lies within the Florida in United States. The average daytime temperature in Key West in December is 76°F (24°C), while the nighttime average is 63°F (17°C). There are typically seven rainy days during the month, with a total precipitation of 1.7 inches (42 mm). The daylight duration in December in Key West is 10 hours, with an average of 7 hours of sunshine per day. The average wind speed in December is 11 mph (18 km/h), and the humidity level is around 75%.

The water temperature in Key West in December ranges from 73°F to 77°F (23°C to 25°C). At the beginning of the month, the average temperature is around 77°F (25°C), shifting to 75°F (24°C) by mid-December and reaching 75°F (24°C) in the last ten days. Overall, the average sea temperature in Key West for December is 75°F (24°C). Optimal swimming conditions. The water is warm, and the air is comfortable for drying off and sunbathing.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in Key West

What is the sea temperature in Key West in December?

The water temperature in the Gulf of Mexico (Gulf of America) in Key West in December ranges from 73°F to 77°F (23°C to 25°C).

Is it possible to swim in the Gulf of Mexico (Gulf of America) in Key West in December?

The average sea temperature in Key West in December is 75°F (24°C), and the air temperature is 76°F (24°C), so optimal swimming conditions. The water is warm, and the air is comfortable for drying off and sunbathing.