January weather forecast and climate
Naples, Italy

A distant view of Mount Vesuvius, from Naples in Italy, with a beautiful blue waterfront
A distant view of Mount Vesuvius, from Naples in Italy, with a beautiful blue waterfront
January, like December, in Naples, Italy, is another fresh winter month, with temperature in the range of an average low of 7.8°C (46°F) and an average high of 12.3°C (54.1°F).

Temperature

The coldest month is January, with an average high-temperature of 12.3°C (54.1°F) and an average low-temperature of 7.8°C (46°F).

Humidity

Months with the highest humidity in Naples are January and November, with an average relative humidity of 73%.

Rainfall

In January, in Naples, the rain falls for 15.4 days. Throughout January, 67mm (2.64") of precipitation is accumulated. In Naples, during the entire year, the rain falls for 139.4 days and collects up to 569mm (22.4") of precipitation.

Snowfall

January and February are months with snowfall. Months with the most snowfall are January and February, with an average 2mm (0.08") of accumulated snow.

Sea temperature

In Naples, the average seawater temperature is 14.6°C (58.3°F).
Note: Swimming in 14.6°C (58.3°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in Naples, Italy, is 9.6h.

Sunshine

January has the least sunshine of the year, with an average of 5.6h of sunshine.

UV index

Months with the lowest UV index are January, February and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 3 in January interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Naples?

The coldest month in Naples, Italy, is January, with an average high-temperature of 12.3°C (54.1°F) and an average low-temperature of 7.8°C (46°F).

What is the temperature in January in Naples?

In January, the average high-temperature is 12.3°C (54.1°F), and the average low-temperature is 7.8°C (46°F).

What is the most humid month in Naples?

Months with the highest humidity in Naples are January and November, with an average relative humidity of 73%.

What is the average humidity in January in Naples?

The average relative humidity in January is 73%.

How much does it rain in Naples in January?

In January, the rain falls for 15.4 days. Throughout January, 67mm (2.64") of precipitation is accumulated.

When does it start to snow in Naples?

January is the first month it typically snows in Naples, Italy. Throughout January, in the average 0.4 snowfall days, it receives 2mm (0.08") of snow.

What is the snowiest month in Naples?

Months with the most snowfall in Naples, Italy, are January and February, with an average 2mm (0.08") of accumulated snow.

How cold is the water in January in Naples?

In Naples, the average seawater temperature in January is 14.6°C (58.3°F). Swimming in 14.6°C (58.3°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in January in Naples?

In January, the average length of the day in Naples, Italy, is 9.6h.

What is the month with the least sunshine in Naples?

January has the least sunshine of the year, with an average of 5.6h of sunshine.

How many hours of sunshine does Naples have in January?

In Naples, the average sunshine in January is 5.6h.

What are the months with the lowest UV index in Naples?

January, February and December, with an average maximum UV index of 3, are months with the lowest UV index in Naples, Italy.

What is the UV index intensity in January in Naples?

The average daily maximum UV index in January in Naples, Italy, is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in January - Naples, Italy
  • Average high temperature in January: 12.3°C

The warmest month (with the highest average high temperature) is August (30°C).
The month with the lowest average high temperature is January (12.3°C).

  • Average low temperature in January: 7.8°C

The month with the highest average low temperature is August (22.7°C).
The coldest months (with the lowest average low temperature) are January and February (7.8°C).

Average pressure in January - Naples, Italy
  • Average pressure in January: 1016.2mbar

The month with the highest atmospheric pressure is December (1018.4mbar).
The month with the lowest atmospheric pressure is April (1014mbar).

Average wind speed in January - Naples, Italy
  • Average wind speed in January: 13.4km/h

The windiest month (with the highest average wind speed) is February (13.9km/h).
The calmest month (with the lowest average wind speed) is August (8.7km/h).

Average humidity in January - Naples, Italy
  • Average humidity in January: 73%

Months with the highest relative humidity are January and November (73%).
The month with the lowest relative humidity is August (61%).

Average rainfall in January - Naples, Italy
  • Average rainfall in January: 67mm

The wettest month (with the highest rainfall) is November (114mm).
The driest month (with the least rainfall) is August (8mm).

Average rainfall days in January - Naples, Italy
  • Average rainfall days in January: 15.4 days

The month with the highest number of rainy days is January (15.4 days).
Months with the least rainy days are July and August (5.2 days).

Average snowfall in January - Naples, Italy
  • Average snowfall in January: 2mm

Months with the highest snowfall are January and February (2mm).
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).

Average snowfall days in January - Naples, Italy
  • Average snowfall days in January: 0.4 days

Months with the highest number of snowfall days are January and February (0.4 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

Average sea temperature in January - Naples, Italy
  • Average sea temperature in January: 14.6°C

The best month for swimming (with the highest average sea temperature) is August (26°C).
The coldest month (with the lowest average sea temperature) is February (13.9°C).

Average daylight in January / Average sunshine in January - Naples, Italy
  • Average daylight in January: 9.6h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in January: 5.6h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is January (Average sunshine: 5.6h).

Average sunshine days in January - Naples, Italy
  • Average sunshine days in January: 12.6 days

The month with the most sunshine days is July (24 days).
The month with the least sunshine days is February (11.1 days).

Average UV index in January - Naples, Italy
  • Average UV index in January: 3

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February and December (UV index 3).

Average cloud cover in January - Naples, Italy
  • Average cloud cover in January: 41

The month with the most cloud cover is January (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 9).

Average visibility in January - Naples, Italy
  • Average visibility in January: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).