December weather forecastCaptiva, FL
December
Weather in December
December signifies the entry of winter in Captiva, accompanied by a refreshing weather shift. A substantial temperature drop to 73.9°F (23.3°C) heralds the closing month of the year. Under the mellow sunshine, daylight hours continue to shorten. Meanwhile, the UV index falls to 6, ensuring cozy and vibrant conditions. Despite being the year's closing month, Captiva's weather serves a delightful endnote to the year-round spectacle.Temperature
December records an average high-temperature of a still moderately hot 73.9°F (23.3°C), indicating a minor variation from the preceding month. Throughout the month of December, the nighttime temperature dips to an average of 63.9°F (17.7°C).Humidity
The most humid month is December, with an average relative humidity of 77%.Rainfall
In Captiva, in December, it is raining for 5.5 days, with typically 0.47" (12mm) of accumulated precipitation. In Captiva, during the entire year, the rain falls for 122 days and collects up to 8.98" (228mm) of precipitation.Ocean temperature
In Captiva, the average seawater temperature in December is 75.2°F (24°C).Note: Consideration of an individual's cold resistance, combined with conditions like sunshine, wind, and temperature, suggests that swimming in 75.2°F (24°C) water can be delightful. (Olympic swimming is usually in 77°F (25°C) to 82.4°F (28°C) water.)
Daylight
December has the shortest days of the year, with an average of 10h and 30min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 5:35 pm. On the last day of December, sunrise is at 7:16 am and sunset at 5:47 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 6.7h of sunshine.UV index
The average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in December interprets into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take note! The UV strength of the Sun elevates when reflected off water and sand.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Captiva, FL
- Average high temperature in December: 73.9°F
The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is January (70°F).
- Average low temperature in December: 63.9°F
The month with the highest average low temperature is August (81°F).
The coldest month (with the lowest average low temperature) is January (58.8°F).
Average pressure in December
Captiva, FL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).
Average wind speed in December
Captiva, FL
- Average wind speed in December: 9.4mph
The windiest months (with the highest average wind speed) are October and November (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).
Average humidity in December
Captiva, FL
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is March (72%).
Average rainfall in December
Captiva, FL
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is March (0.16").
Average rainfall days in December
Captiva, FL
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is September (19.5 days).
The month with the least rainy days is February (4.1 days).
Average sea temperature in December
Captiva, FL
- Average sea temperature in December: 75°F
The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest month (with the lowest average sea temperature) is February (70°F).
Average daylight in December /
Average sunshine in December
Captiva, FL
- Average daylight in December: 10h and 30min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in December: 6h and 42min
The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Captiva, FL
- Average sunshine days in December: 23.1 days
The month with the most sunshine days is January (25.1 days).
The month with the least sunshine days is September (7.2 days).
Average UV index in December
Captiva, FL
- Average UV index in December: 6
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and February (UV index 5).
Average cloud cover in December
Captiva, FL
- Average cloud cover in December: 28
The month with the most cloud cover is January (Cloud cover 29).
The months with the least cloud cover are March and May (Cloud cover 23).
Average visibility in December
Captiva, 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).
