January Weather in Jacksonville, United States

Last updated: June 24, 2025

In January, the average temperature in Jacksonville, United States hovers around 4°C (40°F). Expect a chill, as temperatures can dip as low as -14°C (6°F), while the mercury may rise to a comfortable 16°C (62°F). Be prepared for precipitation, with about 131 mm (5.2 in) falling over 13 days. With an average humidity of 84%, layers are recommended to stay warm and dry!

January Temperature in Jacksonville

In January in Jacksonville, the average temperature is 4°C (40°F). Maximum temperatures can reach 16°C (62°F), while minimums can drop as low as -14°C (6°F). Travelers should be prepared for a wide temperature range and dress in layers to ensure comfort during their visit.

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

The chart illustrates January 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, January typically has an average temperature of 4°C (40°F), with highs reaching up to 16°C (62°F) and lows dropping to around -14°C (6°F).

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

January Precipitation in Jacksonville

In Jacksonville in January, the precipitation amount is 131 mm (5.2 in) over the course of 13 days.

January Precipitation Trends in Jacksonville

The chart displays monthly precipitation patterns in Jacksonville, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Jacksonville, January typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Jacksonville

In Jacksonville in January, humidity is 84%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring extra layers to stay warm and dry while traveling.

January Average Humidity in Jacksonville

This chart illustrates the average monthly humidity levels in Jacksonville, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Jacksonville is approximately 84%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Jacksonville

In Jacksonville in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Jacksonville, you can check the information here.

Maximum UV Index Levels in Jacksonville for January

The chart shows the monthly maximum UV Index (UVI) for Jacksonville in January, 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 January, the maximum UV index in Jacksonville typically reaches 3, which falls under the moderate exposure category.

Data source: Jacksonville January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	131 mm (5.2 inches)	84%	moderate
February Weather	4°C (40°F)	142 mm (5.6 inches)	85%	moderate
March Weather	6°C (44°F)	117 mm (4.6 inches)	86%	high
April Weather	10°C (49°F)	94 mm (3.7 inches)	83%	very high
May Weather	13°C (56°F)	64 mm (2.5 inches)	83%	very high
June Weather	18°C (64°F)	31 mm (1.2 inches)	83%	extreme
July Weather	22°C (71°F)	3 mm (0.1 inches)	78%	very high
August Weather	21°C (71°F)	8 mm (0.3 inches)	67%	very high
September Weather	17°C (63°F)	42 mm (1.7 inches)	66%	very high
October Weather	11°C (52°F)	45 mm (1.8 inches)	77%	high
November Weather	7°C (44°F)	90 mm (3.5 inches)	87%	moderate
December Weather	3°C (38°F)	107 mm (4.2 inches)	87%	low