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 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
September's advent notes a subtle adjustment in average high-temperature to a still moderately hot 24.8°C (76.6°F) from August. Nights in September in Ustica exhibit a minor reduction to an average low temperature of 23.5°C (74.3°F).Humidity
The average relative humidity in September is 69%.Rainfall
In Ustica, Italy, in September, it is raining for 10.8 days, with typically 34mm (1.34") of accumulated precipitation. Throughout the year, in Ustica, Italy, there are 137.1 rainfall days, and 453mm (17.83") of precipitation is accumulated.Sea temperature
In Ustica, in September, the average water temperature is 25.1°C (77.2°F).Note: For any water activity, surface water temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed perfect and extremely pleasing for enduring enjoyment.
Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 06:36 and sunset at 19:37. On the last day of September, sunrise is at 07:02 and sunset at 18:51 CEST.
Sunshine
In Ustica, the average sunshine in September is 11.1h.UV index
The average daily maximum UV index in September in Ustica is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Stay aware! UV radiation is magnified when reflecting off sand and water.
Frequently asked questions
What are the temperatures in Ustica in September?
What is the average humidity in September in Ustica?
How many days does it rain in September in Ustica?
What is the sea water temperature in September in Ustica?
What is the average length of the day in September in Ustica?
When are sunrise and sunset in September in Ustica?
How long on average sun shines in September in Ustica?
What is the UV index intensity in September in Ustica?
Average temperature in September
Ustica, Italy
- Average high temperature in September: 24.8°C
The warmest month (with the highest average high temperature) is August (26.9°C).
The month with the lowest average high temperature is February (13.8°C).
- Average low temperature in September: 23.5°C
The month with the highest average low temperature is August (25.7°C).
The coldest month (with the lowest average low temperature) is February (11.9°C).
Average pressure in September
Ustica, Italy
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is December (1018.9mbar).
The months with the lowest atmospheric pressure are April and July (1014.3mbar).
Average wind speed in September
Ustica, Italy
- Average wind speed in September: 15.2km/h
The windiest months (with the highest average wind speed) are January and December (24.1km/h).
The calmest month (with the lowest average wind speed) is August (10.7km/h).
Average humidity in September
Ustica, Italy
- Average humidity in September: 69%
The months with the highest relative humidity are April and May (75%).
The month with the lowest relative humidity is December (68%).
Average rainfall in September
Ustica, Italy
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is November (77mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in September
Ustica, Italy
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is January (17.8 days).
The month with the least rainy days is July (2.4 days).
Average sea temperature in September
Ustica, Italy
- Average sea temperature in September: 25.1°C
The best month for swimming (with the highest average sea temperature) is August (26.5°C).
The coldest month (with the lowest average sea temperature) is February (14.2°C).
Average daylight in September /
Average sunshine in September
Ustica, Italy
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 1min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in September
Ustica, Italy
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is July (27.9 days).
The month with the least sunshine days is November (9.6 days).
Average UV index in September
Ustica, Italy
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, March and December (UV index 4).
Average cloud cover in September
Ustica, Italy
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 36).
The months with the least cloud cover are July and August (Cloud cover 6).
Average visibility in September
Ustica, 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).
Ustica, Italy
Weather forecast for your location
2. Allow the app to use your location
