January Weather in Jacksonville, United States

Last updated: June 24, 2025

In January, the average temperature in Jacksonville, United States hovers around 10°C (49°F). However, temperatures can vary widely, with a minimum of -12°C (11°F) and a maximum reaching 26°C (80°F). Expect about 109 mm (4.3 in) of precipitation spread over 8 days, accompanied by an average humidity of 79%.

January Temperature in Jacksonville

In January in Jacksonville, the average temperature is 10°C (49°F). Maximums can reach 26°C (80°F), while minimums can drop as low as -12°C (11°F). Be prepared for a wide range of temperatures when traveling during this month!

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 10°C (49°F), with highs reaching up to 26°C (80°F) and lows dropping to around -12°C (11°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 total precipitation amount is 109 mm (4.3 in) spread over 8 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 109 mm (4.3 inches) of precipitation spread over approximately 8 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 79%. With an average temperature of 10°C (49°F), this humidity feels like a chilly mist wrapping around you, making outdoor activities a bit uncomfortable and requiring layers to stay warm while navigating the damp air.

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 79%, 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 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 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 4, 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	10°C (49°F)	109 mm (4.3 inches)	79%	moderate
February Weather	11°C (52°F)	140 mm (5.5 inches)	80%	high
March Weather	16°C (62°F)	119 mm (4.7 inches)	78%	very high
April Weather	19°C (66°F)	132 mm (5.2 inches)	79%	very high
May Weather	24°C (75°F)	148 mm (5.8 inches)	81%	extreme
June Weather	27°C (81°F)	100 mm (4.0 inches)	77%	extreme
July Weather	29°C (85°F)	79 mm (3.1 inches)	71%	extreme
August Weather	29°C (85°F)	79 mm (3.1 inches)	67%	extreme
September Weather	26°C (80°F)	85 mm (3.3 inches)	69%	very high
October Weather	21°C (70°F)	111 mm (4.4 inches)	73%	very high
November Weather	14°C (58°F)	65 mm (2.5 inches)	82%	high
December Weather	12°C (54°F)	115 mm (4.5 inches)	87%	moderate