Portovenere
Italy
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Portovenere, Italy

September, the first month of the autumn, in Portovenere, is still a warm month, with temperature in the range of an average high of 24°C (75.2°F) and an average low of 16°C (60.8°F).

Temperature

In September, the average high-temperature marginally drops, from 27°C (80.6°F) in August, to a still warm 24°C (75.2°F). In Portovenere, Italy, in September, the average low-temperature is 16°C (60.8°F).

Rainfall

In Portovenere, it is raining for 9 days, with typically 79mm (3.1") of accumulated precipitation. Throughout the year, there are 131 rainfall days, and 1007mm (39.6") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature in Portovenere is 23.3°C (73.9°F).
Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 23.3°C (73.9°F).

Daylight

The average length of the day in September is 12.5h.

Sunshine

The average sunshine in Portovenere is 7h.

UV index

In September, the average daily maximum UV index in Portovenere is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 significantly increased by the reflection of the water and sand.

What is the temperature in September in Portovenere?

In Portovenere, Italy, in September, the average high-temperature is 24°C (75.2°F), and the average low-temperature is 16°C (60.8°F).

How many days does it rain in September in Portovenere?

In September, in Portovenere, Italy, the rain falls for 9 days. Throughout September, 79mm (3.1") of precipitation is accumulated.

What is the sea temperature in September in Portovenere?

In September, the average sea temperature in Portovenere is 23.3°C (73.9°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 23.3°C (73.9°F) water.

How many hours of daylight does Portovenere have in September?

In Portovenere, Italy, the average length of the day in September is 12.5h.

How many hours of sunshine does Portovenere have in September?

The average sunshine in September in Portovenere, Italy, is 7h.

How high is the UV index in September in Portovenere?

In Portovenere, Italy, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Portovenere, Italy
  • Average high temperature in September: 24°C

Warmest months (with the highest average high temperature) are July and August (27°C).
The month with the lowest average high temperature is January (10°C).

  • Average low temperature in September: 16°C

Months with the highest average low temperature are July and August (18°C).
Coldest months (with the lowest average low temperature) are January and February (4°C).

Average rainfall in September - Portovenere, Italy
  • Average rainfall in September: 79mm

The wettest month (with the highest rainfall) is October (130mm).
The driest month (with the lowest rainfall) is July (25mm).

Average rainfall days in September - Portovenere, Italy
  • Average rainfall days in September: 9 days

Months with the highest number of rainy days are March, April and November (13 days).
The month with the lowest number of rainy days is July (6 days).

Average sea temperature in September - Portovenere, Italy
  • Average sea temperature in September: 23.3°C

The best month for swimming (with the highest average sea temperature) is August (24.4°C).
The coldest month (with the lowest average sea temperature) is February (12.9°C).

Average daylight in September / Average sunshine in September - Portovenere, Italy
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 8.9h).

  • Average sunshine in September: 7h

The month with most sunshine is July (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 3h).

Average UV index in September - Portovenere, Italy
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).