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

December's weather displays an average high-temperature of a comfortable 67.5°F (19.7°C), slightly varied from November's 72°F (22.2°C). Jacksonville sees an average low-temperature of 52.7°F (11.5°C) during December.

Humidity

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

Rainfall

In Jacksonville, during December, the rain falls for 11.6 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Jacksonville, during the entire year, the rain falls for 172.6 days and collects up to 25.35" (644mm) of precipitation.

Snowfall

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

Ocean temperature

In Jacksonville, the average seawater temperature in December is 64.9°F (18.3°C).
Note: In water of 64.9°F (18.3°C), the majority of people do not enjoy swimming. Breathing becomes increasingly hard to manage as the temperature drops from 69.8°F (21°C) to 59°F (15°C).

Daylight

With an average of 10h and 12min of daylight, December has the shortest days of the year.
On the first day of December, 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 is December, with an average of 5.9h of sunshine.

UV index

In December, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum daily UV index of 5 during December morphs into the following directions:
Put precautions into practice - Protective measures against sun-induced damage are advised. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature?

The high-temperature, in December, in Jacksonville, records 67.5°F (19.7°C), while the low-temperature is 52.7°F (11.5°C). In October, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is evaluated at 84.2°F (29°C).

What is the most humid month?

December is the most humid month, with an average relative humidity of 76%.

What is the average humidity in December?

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

How much does it rain in December?

In Jacksonville, 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?

December has the most snowfall days of the year. Snow falls for 0.1 days.

When does it start snowing?

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, the average seawater temperature in December is 64.9°F (18.3°C). For swimming, a surface water temperature of 64.9°F (18.3°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days?

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

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?

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?

December has the least sunshine of the year, 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 reading in December?

In Jacksonville, the average daily maximum UV index in December is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
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).

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).

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).

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%).

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").

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).

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).

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).

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).

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).

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).

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).

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).

Jacksonville, Florida, USA

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