December weather forecastDuck Key, FL
December
Weather in December
December, the first month of the winter in Duck Key, is still a warm month, with an average temperature fluctuating between 75.6°F (24.2°C) and 71.4°F (21.9°C).Temperature
December's presence records an average high-temperature of a still warm 75.6°F (24.2°C), closely mirroring November's climate. Duck Key's evenings during December maintain an average temperature of 71.4°F (21.9°C), aligning closely with the daytime temperatures.Humidity
February and December, with an average relative humidity of 77%, are the most humid months.Rainfall
In Duck Key, during December, the rain falls for 12.5 days and regularly aggregates up to 1.06" (27mm) of precipitation. In Duck Key, during the entire year, the rain falls for 186.2 days and collects up to 24.45" (621mm) of precipitation.Ocean temperature
In December, the average ocean temperature is 76.5°F (24.7°C).Note: For someone not comfortable with cold, swimming in 76.5°F (24.7°C) waters might be a stretch. However, with favorable conditions like abundant sunshine, mild wind, and warm air temperatures, the experience can be improved. And while wetsuits are not a must, they can be considered.
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 6:51 am and sunset at 5:34 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:45 pm EST.
Sunshine
With an average of 6.6h of sunshine, December has the least sunshine of the year.UV index
In Duck Key, the average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 6 in December interprets into the following advice:
Fend off overexposure. Sun protection is vital. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Duck Key, FL
- Average high temperature in December: 75.6°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.9°F).
- Average low temperature in December: 71.4°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 (67.5°F).
Average pressure in December
Duck Key, FL
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are September and October (29.94"Hg).
Average wind speed in December
Duck Key, FL
- Average wind speed in December: 12.9mph
The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is July (9mph).
Average humidity in December
Duck Key, FL
- Average humidity in December: 77%
The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is March (73%).
Average rainfall in December
Duck Key, FL
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is September (4.21").
The driest month (with the least rainfall) is March (0.43").
Average rainfall days in December
Duck Key, FL
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is September (23 days).
The month with the least rainy days is February (10.3 days).
Average sea temperature in December
Duck Key, FL
- Average sea temperature in December: 76.5°F
The best month for swimming (with the highest average sea temperature) is August (86.6°F).
The coldest months (with the lowest average sea temperature) are January and February (73.9°F).
Average daylight in December /
Average sunshine in December
Duck Key, FL
- Average daylight in December: 10h and 36min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in December: 6h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in December
Duck Key, FL
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is March (18 days).
The month with the least sunshine days is September (4.6 days).
Average UV index in December
Duck Key, 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
Duck Key, FL
- Average cloud cover in December: 31
The months with the most cloud cover are January and October (Cloud cover 32).
The month with the least cloud cover is April (Cloud cover 23).
Average visibility in December
Duck Key, 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).
