December weather forecast
Captiva, FL

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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.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in December?

An average high-temperature, in December, in Captiva, is 73.9°F (23.3°C) and the average low-temperature is 63.9°F (17.7°C). In October, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 89.6°F (32°C).

What is the most humid month?

The most humid month is December, with an average relative humidity of 77%.

What is the average humidity in December?

In Captiva, the average relative humidity in December is 77%.

How many days does it rain in December?

In December, the rain falls for 5.5 days. Throughout December, 0.47" (12mm) of precipitation is accumulated.

How warm is the water in December?

In December, the average ocean temperature is 75.2°F (24°C). For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 75.2°F (24°C).

What is the month with the shortest days?

With an average of 10h and 30min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 10h and 31min.

What time are sunrise and sunset in December in Captiva?

In December, on the first day of the month, sunrise is at 7:00 am and sunset at 5:35 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:47 pm EST.

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 6.7h of sunshine.

How long on average sun shines in December?

The average sunshine duration in December is 6.7h.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Captiva, FL

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 - 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 - 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 - 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 - 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 - 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 - 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 / Average sunshine in December - Captiva, FL
  • Average daylight in December: 10h and 3min

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 4min

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 - 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 - 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 - 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 - 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).

Captiva, Florida, USA

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