Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
A moderate decline in average high-temperatures is noted in September, moving from a moderately hot 26.3°C (79.3°F) in August to a pleasant 22.6°C (72.7°F). Portovenere records a steady low-temperature average of 17°C (62.6°F) during September.Humidity
In September, the average relative humidity in Portovenere is 71%.Rainfall
In Portovenere, Italy, in September, during 13.5 rainfall days, 56mm (2.2") of precipitation is typically accumulated. In Portovenere, during the entire year, the rain falls for 179.2 days and collects up to 834mm (32.83") of precipitation.Snowfall
In Portovenere, snow does not fall in April through November.Sea temperature
In Portovenere, Italy, the average seawater temperature in September is 23.3°C (73.9°F).Note: When thinking about a swim in 23.3°C (73.9°F) waters, consider your cold tolerance, the day's sunshine, wind, and air temperature. It is a fun fact that Olympic swimmers dive into waters of 25°C (77°F) to 28°C (82.4°F).
Daylight
In September, the average length of the day in Portovenere is 12h and 31min.On the first day of September, sunrise is at 06:44 and sunset at 19:56. On the last day of the month, sunrise is at 07:17 and sunset at 19:03 CEST.
Sunshine
The average sunshine in September is 10.2h.UV index
In September, the average daily maximum UV index in Portovenere is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
Frequently asked questions
What is the usual temperature for Portovenere in September?
What is the average humidity in September in Portovenere?
How many days does it rain in September in Portovenere?
When it does not snow in Portovenere?
What is the sea temperature in September in Portovenere?
What is the average length of the day in September in Portovenere?
What time are sunrise and sunset in September in Portovenere?
How long on average sun shines in September in Portovenere?
How high is the UV index in September in Portovenere?
Average temperature in September
Portovenere, Italy
- Average high temperature in September: 22.6°C
The warmest month (with the highest average high temperature) is August (26.3°C).
The month with the lowest average high temperature is January (9°C).
- Average low temperature in September: 17°C
The month with the highest average low temperature is August (19.8°C).
The coldest month (with the lowest average low temperature) is January (5.3°C).
Average pressure in September
Portovenere, Italy
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is July (1013.7mbar).
Average wind speed in September
Portovenere, Italy
- Average wind speed in September: 8.6km/h
The windiest month (with the highest average wind speed) is February (11.6km/h).
The calmest months (with the lowest average wind speed) are July and August (7.8km/h).
Average humidity in September
Portovenere, Italy
- Average humidity in September: 71%
The month with the highest relative humidity is November (77%).
The month with the lowest relative humidity is August (69%).
Average rainfall in September
Portovenere, Italy
- Average rainfall in September: 56mm
The wettest month (with the highest rainfall) is November (131mm).
The driest month (with the least rainfall) is July (43mm).
Average rainfall days in September
Portovenere, Italy
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is August (11.9 days).
Average snowfall in September
Portovenere, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is December (5mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Portovenere, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 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: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 42min).
Average sunshine days in September
Portovenere, Italy
- Average sunshine days in September: 11.7 days
The month with the most sunshine days is January (14.3 days).
The month with the least sunshine days is May (8.4 days).
Average UV index in September
Portovenere, Italy
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Portovenere, Italy
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Portovenere, Italy
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (10km).
The month with the lowest visibility is November (9km).
Portovenere, Italy
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