December Weather in Jacksonville, United States

Last updated: June 24, 2025

In December, the average temperature in Jacksonville, United States hovers around 10°C (50°F). Be prepared for a range of temperatures, with a minimum dropping to -5°C (24°F) and a maximum reaching up to 25°C (78°F). During this time, 116 mm (4.6 in) of precipitation is expected over about 10 days, contributing to an average humidity of 86%.

December Temperature in Jacksonville

In December in Jacksonville, the average temperature is 10°C (50°F), with maximums reaching up to 25°C (78°F) and minimums dropping as low as -5°C (24°F). This variability in temperature makes Jacksonville an intriguing destination for travelers who enjoy diverse weather conditions.

December Weather in Jacksonville: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Jacksonville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jacksonville, December typically has an average temperature of 10°C (50°F), with highs reaching up to 25°C (78°F) and lows dropping to around -5°C (24°F).

Data source: Temperature data for Jacksonville generated using information from the Copernicus Climate Change Service.

December Precipitation in Jacksonville

In Jacksonville in December, the total precipitation amount is 116 mm (4.6 in) over a span of 10 days.

December Precipitation Trends in Jacksonville

The chart displays monthly precipitation patterns in Jacksonville, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Jacksonville, December typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Jacksonville

In Jacksonville in December humidity is 86%. With an average temperature of 10°C (50°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities uncomfortable and sticky, which can dampen the spirit of travel.

December Average Humidity in Jacksonville

This chart illustrates the average monthly humidity levels in Jacksonville, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Jacksonville is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Jacksonville

In Jacksonville in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Jacksonville for better planning.

Maximum UV Index Levels in Jacksonville for December

The chart shows the monthly maximum UV Index (UVI) for Jacksonville in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Jacksonville typically reaches 4, which falls under the moderate exposure category.

Data source: Jacksonville December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Jacksonville Compares to Other Months

Weather in Jacksonville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Jacksonville, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Jacksonville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	73 mm (2.9 inches)	85%	moderate
February Weather	11°C (52°F)	98 mm (3.8 inches)	82%	high
March Weather	13°C (55°F)	67 mm (2.6 inches)	81%	very high
April Weather	17°C (63°F)	114 mm (4.5 inches)	80%	very high
May Weather	22°C (72°F)	122 mm (4.8 inches)	81%	extreme
June Weather	25°C (77°F)	191 mm (7.5 inches)	81%	extreme
July Weather	27°C (80°F)	176 mm (6.9 inches)	81%	extreme
August Weather	26°C (79°F)	215 mm (8.5 inches)	80%	very high
September Weather	24°C (76°F)	224 mm (8.8 inches)	79%	very high
October Weather	20°C (68°F)	69 mm (2.7 inches)	80%	very high
November Weather	13°C (55°F)	110 mm (4.3 inches)	85%	high
December Weather	10°C (50°F)	116 mm (4.6 inches)	86%	moderate