Jacksonville
Florida, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Jacksonville, FL

Water geysers at the fountain of Jacksonville in Florida, with the cityscape
Water geysers at the fountain of Jacksonville in Florida, with the cityscape
The first month of the winter, December, is also an enjoyable month in Jacksonville, Florida, with average temperature ranging between max 66.6°F (19.2°C) and min 43.9°F (6.6°C).

Temperature

In Jacksonville, the average high-temperature marginally drops, from a warm 73.6°F (23.1°C) in November, to a comfortable 66.6°F (19.2°C). The average low-temperature, in December, is 43.9°F (6.6°C).

Humidity

The average relative humidity in Jacksonville, Florida, is 76.7%.

Rainfall

In Jacksonville, during 7.4 rainfall days, 2.8" (71.1mm) of precipitation is typically accumulated. In Jacksonville, Florida, during the entire year, the rain falls for 113.5 days and collects up to 52.4" (1330.6mm) of precipitation.

Ocean temperature

In Jacksonville, the average water temperature is 64.9°F (18.3°C). Swimming in 64.9°F (18.3°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

December has the shortest days of the year, with an average of 10.2h of daylight.

Sunshine

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

UV index

January and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
In December, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Jacksonville?

In Jacksonville, in December, the average high-temperature is 66.6°F (19.2°C), and the average low-temperature is 43.9°F (6.6°C).

What is the average humidity in December in Jacksonville?

The average relative humidity in December in Jacksonville is 76.7%.

How many days does it rain in December in Jacksonville?

In Jacksonville, in December, it is raining for 7.4 days, with typically 2.8" (71.1mm) of accumulated precipitation.

What is the ocean temperature in December in Jacksonville?

In Jacksonville, the average seawater temperature in December is 64.9°F (18.3°C). Swimming in 64.9°F (18.3°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days in Jacksonville?

The month with the shortest days in Jacksonville is December, with an average of 10.2h of daylight.

How many hours of daylight does Jacksonville have in December?

In December, the average length of the day in Jacksonville is 10.2h.

What is the month with the least sunshine in Jacksonville?

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

How many hours of sunshine does Jacksonville have in December?

In December, the average sunshine in Jacksonville, Florida, is 5.9h.

What is the month with the lowest UV index in Jacksonville?

Months with the lowest UV index in Jacksonville, Florida, are January and December, with an average maximum UV index of 4.

What is the UV index intensity in December in Jacksonville?

In December, the average daily maximum UV index in Jacksonville, Florida, is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in December - Jacksonville, FL
  • Average high temperature in December: 66.6°F

The warmest month (with the highest average high temperature) is July (92°F).
The month with the lowest average high temperature is January (64.8°F).

  • Average low temperature in December: 43.9°F

The month with the highest average low temperature is August (72.7°F).
The coldest month (with the lowest average low temperature) is January (41.4°F).

Average humidity in December - Jacksonville, FL
  • Average humidity in December: 76.7%

The month with the highest relative humidity is September (80.8%).
The month with the lowest relative humidity is April (69.5%).

Average rainfall in December - Jacksonville, FL
  • Average rainfall in December: 2.8"

The wettest month (with the highest rainfall) is September (8.2").
The driest month (with the lowest rainfall) is November (2.1").

Average rainfall days in December - Jacksonville, FL
  • Average rainfall days in December: 7.4 days

The month with the highest number of rainy days is August (15 days).
The month with the lowest number of rainy days is April (5.7 days).

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).

Average daylight in December / Average sunshine in December - Jacksonville, FL
  • Average daylight in December: 10.2h

The month with the longest days is June (Average daylight: 14.1h).
The month with shortest days is December (Average daylight: 10.2h).

  • Average sunshine in December: 5.9h

The month with most sunshine is May (Average sunshine: 9.8h).
The month with least sunshine is December (Average sunshine: 5.9h).

Average UV index in December - Jacksonville, FL
  • Average UV index in December: 4

Months with the highest UV index are June and July (UV index 11).
Months with the lowest UV index are January and December (UV index 4).