January Weather in Naples, United States

Last updated: June 24, 2025

In January, the average temperature in Naples, United States hovers around 8°C (47°F). You can expect a range where temperatures can dip as low as -14°C (6°F) and reach a maximum of 25°C (77°F). Don't forget your umbrella, as the region receives an average of 102 mm (4.0 in) of precipitation spread over 9 days, contributing to an average humidity of 82%.

January Temperature in Naples

In January in Naples, the average temperature is 8°C (47°F). The maximum can reach 25°C (77°F), while the minimum can drop as low as -14°C (6°F). Be sure to pack for a wide range of temperatures when traveling during this time!

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

The chart illustrates January temperature patterns in Naples, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Naples, January typically has an average temperature of 8°C (47°F), with highs reaching up to 25°C (77°F) and lows dropping to around -14°C (6°F).

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

January Precipitation in Naples

In Naples in January, the total precipitation amount is 102 mm (4.0 in) over a span of 9 days.

January Precipitation Trends in Naples

The chart displays monthly precipitation patterns in Naples, 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 Naples, January typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 9 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 Naples

In Naples in January humidity is 82%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration less enjoyable and requiring extra layers to stay warm and comfortable.

January Average Humidity in Naples

This chart illustrates the average monthly humidity levels in Naples, 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 Naples is approximately 82%, 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 Naples

In Naples 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 Naples for better planning.

Maximum UV Index Levels in Naples for January

The chart shows the monthly maximum UV Index (UVI) for Naples 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 Naples typically reaches 4, which falls under the moderate exposure category.

Data source: Naples 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 Naples Compares to Other Months

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

This table compares monthly weather conditions in Naples, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	102 mm (4.0 inches)	82%	moderate
February Weather	9°C (49°F)	146 mm (5.8 inches)	80%	high
March Weather	15°C (59°F)	130 mm (5.1 inches)	78%	very high
April Weather	18°C (64°F)	198 mm (7.8 inches)	79%	very high
May Weather	23°C (73°F)	163 mm (6.4 inches)	81%	extreme
June Weather	27°C (80°F)	103 mm (4.1 inches)	77%	extreme
July Weather	28°C (84°F)	79 mm (3.1 inches)	72%	extreme
August Weather	28°C (83°F)	83 mm (3.3 inches)	65%	extreme
September Weather	26°C (78°F)	86 mm (3.4 inches)	63%	very high
October Weather	20°C (67°F)	120 mm (4.7 inches)	70%	very high
November Weather	13°C (55°F)	67 mm (2.6 inches)	82%	high
December Weather	10°C (51°F)	118 mm (4.6 inches)	88%	moderate