December weather forecast
Jacksonville, FL

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Water geysers at the fountain of Jacksonville in Florida, USA, with the cityscape
Water geysers at the fountain of Jacksonville in Florida, USA, with the cityscape

Weather in December

December brings Jacksonville full circle, as it delves deep into the heart of winter. The city experiences a steady fall in the average sea temperature from 71.9°F (22.2°C) in November to 64.9°F (18.3°C) in December. A distinct increase in cloud cover brings over shades of winter amidst the Floridian fair climate. Despite these changes, the temperature range remains pleasant, offering sunshine-filled days and comfortably cool nights. The transitioning season denotes the conclusion of another weather cycle, leading way into a fresh year of equally diverse climate patterns.

Temperature

Jacksonville's transition from November to December introduces an average high-temperature of a comfortable 67.5°F (19.7°C), marking an insignificant variation from the 72°F (22.2°C). December brings Jacksonville a consistent average low-temperature of 52.7°F (11.5°C).

Humidity

The most humid month in Jacksonville is December, with an average relative humidity of 76%.

Rainfall

In Jacksonville, in December, it is raining for 11.6 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, there are 172.6 rainfall days, and 25.35" (644mm) of precipitation is accumulated.

Snowfall

The only month with snowfall is December. The month with the most snowfall days in Jacksonville, Florida, is December, when snow falls for 0.1 days.

Ocean temperature

In December, the average ocean temperature is 64.9°F (18.3°C).
Note: Swimming is not enjoyable for most people in water that is 64.9°F (18.3°C). As the temperature descends from 69.8°F (21°C) to 59°F (15°C), breathing control becomes harder.

Daylight

December has the shortest days of the year, with an average of 10h and 12min of daylight.
On the first day of December in Jacksonville, sunrise is at 7:06 am and sunset at 5:25 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:36 pm EST.

Sunshine

The month with the least sunshine in Jacksonville is December, with an average of 5.9h of sunshine.

UV index

In Jacksonville, the average daily maximum UV index in December is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 5 during December translates into the following guidance:
Act with care - Obligation to protect against skin and eye damage is highlighted. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What are the temperatures in Jacksonville in December?

During December, Jacksonville experiences an average high-temperature of 67.5°F (19.7°C) and a low-temperature of 52.7°F (11.5°C). In October, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 84.2°F (29°C).

What is the most humid month in Jacksonville?

The most humid month in Jacksonville is December, with an average relative humidity of 76%.

What is the average humidity in December in Jacksonville?

In December, the average relative humidity in Jacksonville is 76%.

How much does it rain in Jacksonville in December?

In Jacksonville, Florida, during December, the rain falls for 11.6 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When does it snow the most in Jacksonville?

The month with the most snowfall days in Jacksonville, Florida, is December, when snow falls for 0.1 days.

When does it start snowing in Jacksonville?

December is the first month it typically snows. Throughout December, there are 0.1 snowfall days.

What is the ocean temperature in December in Jacksonville?

In December, the average ocean temperature is 64.9°F (18.3°C). For most, swimming in 64.9°F (18.3°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the month with the shortest days in Jacksonville?

December has the shortest days of the year in Jacksonville, with an average of 10h and 12min of daylight.

How many hours of daylight does Jacksonville have in December?

In December, the average day length is 10h and 14min.

What time are sunrise and sunset in December in Jacksonville?

On the first day of December in Jacksonville, sunrise is at 7:06 am and sunset at 5:25 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:36 pm EST.

What is the month with the least sunshine in Jacksonville?

The month with the least sunshine in Jacksonville is December, with an average of 5.9h of sunshine.

How many hours of sunshine does Jacksonville have in December?

The average sunshine duration in December is 5.9h.

What is the UV index intensity in December in Jacksonville?

In Jacksonville, the average daily maximum UV index in December is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Jacksonville, FL

Average temperature in December - Jacksonville, FL
  • Average high temperature in December: 67.5°F

The warmest months (with the highest average high temperature) are July and August (91.4°F).
The month with the lowest average high temperature is January (63.1°F).

  • Average low temperature in December: 52.7°F

The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is January (47.8°F).

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Average pressure in December
Jacksonville, FL

Average pressure in December - Jacksonville, FL
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).

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Average wind speed in December
Jacksonville, FL

Average wind speed in December - Jacksonville, FL
  • Average wind speed in December: 6.3mph

The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in December
Jacksonville, FL

Average humidity in December - Jacksonville, FL
  • Average humidity in December: 76%

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is March (69%).

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Average rainfall in December
Jacksonville, FL

Average rainfall in December - Jacksonville, FL
  • Average rainfall in December: 1.89"

The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.1").

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Average rainfall days in December
Jacksonville, FL

Average rainfall days in December - Jacksonville, FL
  • Average rainfall days in December: 11.6 days

The month with the highest number of rainy days is August (23.3 days).
The month with the least rainy days is November (9 days).

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Average snowfall days in December
Jacksonville, FL

Average snowfall days in December - Jacksonville, FL
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in December
Jacksonville, FL

Average sea temperature in December - Jacksonville, FL
  • Average sea temperature in December: 64.9°F

The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (60.4°F).

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Average daylight in December /
Average sunshine in December
Jacksonville, FL

Average daylight in December / Average sunshine in December - Jacksonville, FL
  • Average daylight in December: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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Average sunshine days in December
Jacksonville, FL

Average sunshine days in December - Jacksonville, FL
  • Average sunshine days in December: 17.4 days

The month with the most sunshine days is January (18.8 days).
The month with the least sunshine days is August (6.3 days).

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Average UV index in December
Jacksonville, FL

Average UV index in December - Jacksonville, FL
  • Average UV index in December: 5

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 4).

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Average cloud cover in December
Jacksonville, FL

Average cloud cover in December - Jacksonville, FL
  • Average cloud cover in December: 39

The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 27).

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Average visibility in December
Jacksonville, FL

Average visibility in December - Jacksonville, 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).

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Jacksonville, Florida, USA

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