Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Key West greets December with an average high-temperature of a still moderately hot 75.2°F (24°C), marking a slight deviation from the preceding month. Key West observes a minimal variance in temperature, with a consistent average low of 72.5°F (22.5°C) during the nights of December.Humidity
In December, the average relative humidity in Key West is 77%.Rainfall
In December, in Key West, Florida, the rain falls for 13.4 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 199.2 rainfall days, and 31.61" (803mm) of precipitation is accumulated.Ocean temperature
In Key West, in December, the average water temperature is 74.5°F (23.6°C).Note: Every individual's cold threshold differs, but factors like today's sunshine, wind, and temperature can tip the scales for a delightful swim in 74.5°F (23.6°C) waters. For reference, Olympians swim in waters of 77°F (25°C) to 82.4°F (28°C).
Daylight
The month with the shortest days is December, with an average of 10h and 36min of daylight.On the first day of December, sunrise is at 6:54 am and sunset at 5:38 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:49 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 6.3h of sunshine.UV index
In December, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 6 during December leads to these instructions:
Guard against overexposure. Protection from sun-induced harm is essential. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Attention! The reflection of both water and sand can increase the intensity of UV rays.
Frequently asked questions
What are December temperatures in Key West?
What is the average humidity in December in Key West?
How much does it rain in Key West in December?
How warm is the water in December in Key West?
What is the month with the shortest days in Key West?
How many hours of daylight does Key West have in December?
What time are sunrise and sunset in December in Key West?
What is the month with the least sunshine in Key West?
How long on average sun shines in December in Key West?
What is the UV index intensity in December in Key West?
Average temperature in December
Key West, FL
- Average high temperature in December: 75.2°F
The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is January (72.7°F).
- Average low temperature in December: 72.5°F
The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (68.5°F).
Average pressure in December
Key West, FL
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are September and October (29.93"Hg).
Average wind speed in December
Key West, FL
- Average wind speed in December: 13.8mph
The windiest months (with the highest average wind speed) are January and November (14.4mph).
The calmest month (with the lowest average wind speed) is July (9.5mph).
Average humidity in December
Key West, FL
- Average humidity in December: 77%
The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are July, August and September (74%).
Average rainfall in December
Key West, FL
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is September (5.12").
The driest month (with the least rainfall) is March (0.67").
Average rainfall days in December
Key West, FL
- Average rainfall days in December: 13.4 days
The months with the highest number of rainy days are August and September (23.1 days).
The month with the least rainy days is February (11 days).
Average sea temperature in December
Key West, FL
- Average sea temperature in December: 74.5°F
The best month for swimming (with the highest average sea temperature) is August (86.9°F).
The coldest months (with the lowest average sea temperature) are January and February (71.2°F).
Average daylight in December /
Average sunshine in December
Key West, FL
- Average daylight in December: 10h and 4min
The month with the longest days is June (Average daylight: 13h and 36min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in December: 6h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in December
Key West, FL
- Average sunshine days in December: 12.2 days
The month with the most sunshine days is March (17 days).
The month with the least sunshine days is September (4.5 days).
Average UV index in December
Key West, FL
- Average UV index in December: 6
The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).
Average cloud cover in December
Key West, FL
- Average cloud cover in December: 33
The month with the most cloud cover is January (Cloud cover 34).
The month with the least cloud cover is April (Cloud cover 23).
Average visibility in December
Key West, FL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Key West, Florida, USA
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