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 shift from August to September coincides with a small decrease in the average high-temperature, down to a still warm 24.6°C (76.3°F) from 28.2°C (82.8°F). Civitavecchia maintains an average of approximately an enjoyable 19.7°C (67.5°F) during September nights, with only a minimal decrease from the daytime temperature.Humidity
The average relative humidity in September is 68%.Rainfall
In Civitavecchia, in September, during 10.2 rainfall days, 47mm (1.85") of precipitation is typically accumulated. Throughout the year, there are 122 rainfall days, and 454mm (17.87") of precipitation is accumulated.Snowfall
In Civitavecchia, Italy, snow does not fall in January, March through December.Sea temperature
In September, the average sea temperature is 23.5°C (74.3°F).Note: The allure of a swim in 23.5°C (74.3°F) waters can be influenced by your feelings towards the cold, today's sunshine, the wind's touch, and the ambient warmth. To put it in perspective, Olympic standards demand water temperatures of 25°C (77°F) to 28°C (82.4°F).
Daylight
In September, the average length of the day is 12h and 29min.On the first day of September in Civitavecchia, sunrise is at 06:38 and sunset at 19:46. On the last day of the month, sunrise is at 07:09 and sunset at 18:56 CEST.
Sunshine
The average sunshine in September in Civitavecchia, Italy, is 10.6h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 6 during September leads to these instructions:
Guard oneself from overexposure. Defence against sun injury is vital. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
Frequently asked questions
What are the temperatures in Civitavecchia in September?
What is the average humidity in September in Civitavecchia?
How much does it rain in Civitavecchia in September?
When it does not snow in Civitavecchia?
How warm is the water in September in Civitavecchia?
How many hours of daylight does Civitavecchia have in September?
When is the sunrise / sunset in September in Civitavecchia?
How long on average sun shines in September in Civitavecchia?
How high is the UV index in September in Civitavecchia?
Average temperature in September
Civitavecchia, Italy
- Average high temperature in September: 24.6°C
The warmest month (with the highest average high temperature) is August (28.2°C).
The month with the lowest average high temperature is January (12°C).
- Average low temperature in September: 19.7°C
The month with the highest average low temperature is August (22.7°C).
The coldest month (with the lowest average low temperature) is February (8.1°C).
Average pressure in September
Civitavecchia, 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 April (1014mbar).
Average wind speed in September
Civitavecchia, Italy
- Average wind speed in September: 13.8km/h
The windiest month (with the highest average wind speed) is February (19.7km/h).
The calmest month (with the lowest average wind speed) is July (12.1km/h).
Average humidity in September
Civitavecchia, Italy
- Average humidity in September: 68%
The months with the highest relative humidity are April and November (75%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Civitavecchia, Italy
- Average rainfall in September: 47mm
The wettest month (with the highest rainfall) is November (109mm).
The driest month (with the least rainfall) is August (12mm).
Average rainfall days in September
Civitavecchia, Italy
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is November (15.5 days).
The month with the least rainy days is August (4.7 days).
Average snowfall in September
Civitavecchia, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is February (2mm).
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
Civitavecchia, Italy
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and December (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Civitavecchia, Italy
- Average sea temperature in September: 23.5°C
The best month for swimming (with the highest average sea temperature) is August (24.6°C).
The coldest month (with the lowest average sea temperature) is February (13.7°C).
Average daylight in September /
Average sunshine in September
Civitavecchia, Italy
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in September
Civitavecchia, Italy
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is August (24.9 days).
The month with the least sunshine days is November (12.6 days).
Average UV index in September
Civitavecchia, Italy
- Average UV index in September: 6
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Civitavecchia, Italy
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Civitavecchia, 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).
Civitavecchia, Italy
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