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
The transition from August to September brings an average high-temperature of a still warm 24.9°C (76.8°F), barely different from August's 27.7°C (81.9°F). Ventotene experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 21.9°C (71.4°F) throughout September.Humidity
September is the least humid month in Ventotene, with an average relative humidity of 66%.Rainfall
In Ventotene, Italy, in September, it is raining for 12.8 days, with typically 63mm (2.48") of accumulated precipitation. In Ventotene, during the entire year, the rain falls for 147.3 days and collects up to 680mm (26.77") of precipitation.Snowfall
January, March through December are months without snowfall.Sea temperature
In September, the average sea temperature is 24.6°C (76.3°F).Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.6°C (76.3°F) water. (FYI: The Olympic swimming competition requires a water temperature between 25°C (77°F) and 28°C (82.4°F).)
Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 06:33 and sunset at 19:38. On the last day of September, sunrise is at 07:02 and sunset at 18:49 CEST.
Sunshine
The average sunshine in September in Ventotene is 10.9h.UV index
In Ventotene, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 6 during September translates into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Notice! Sand and water reflections contribute to a stronger UV exposure.
Frequently asked questions
What is the average September temperature in Ventotene?
What is the least humid month in Ventotene?
What is the average humidity in September in Ventotene?
How many days does it rain in September in Ventotene?
When it does not snow in Ventotene?
What is the water temperature in September in Ventotene?
What is the average length of the day in September in Ventotene?
When are sunrise and sunset in September in Ventotene?
How many hours of sunshine does Ventotene have in September?
What is the UV index reading in September in Ventotene?
Average temperature in September
Ventotene, Italy
- Average high temperature in September: 24.9°C
The warmest month (with the highest average high temperature) is August (27.7°C).
The month with the lowest average high temperature is January (12.8°C).
- Average low temperature in September: 21.9°C
The month with the highest average low temperature is August (24.7°C).
The coldest month (with the lowest average low temperature) is February (10.1°C).
Average pressure in September
Ventotene, Italy
- Average pressure in September: 1015.7mbar
The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is April (1014mbar).
Average wind speed in September
Ventotene, Italy
- Average wind speed in September: 13.3km/h
The windiest month (with the highest average wind speed) is February (18.7km/h).
The calmest month (with the lowest average wind speed) is August (11.2km/h).
Average humidity in September
Ventotene, Italy
- Average humidity in September: 66%
The months with the highest relative humidity are March, April and May (72%).
The month with the lowest relative humidity is September (66%).
Average rainfall in September
Ventotene, Italy
- Average rainfall in September: 63mm
The wettest month (with the highest rainfall) is November (140mm).
The driest month (with the least rainfall) is August (11mm).
Average rainfall days in September
Ventotene, Italy
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is November (17.3 days).
The month with the least rainy days is August (4.2 days).
Average snowfall in September
Ventotene, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is February (1mm).
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Ventotene, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Ventotene, Italy
- Average sea temperature in September: 24.6°C
The best month for swimming (with the highest average sea temperature) is August (25.6°C).
The coldest month (with the lowest average sea temperature) is February (13.9°C).
Average daylight in September /
Average sunshine in September
Ventotene, Italy
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
Ventotene, Italy
- Average sunshine days in September: 15.3 days
The months with the most sunshine days are July and August (23.3 days).
The month with the least sunshine days is November (11.2 days).
Average UV index in September
Ventotene, Italy
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Ventotene, Italy
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in September
Ventotene, Italy
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Ventotene, Italy
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