September weather forecast
Venice, Italy

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The Grand water canal of Venice in Italy and a background view of Santa Maria Della Salute Basilica
The Grand water canal of Venice in Italy and a background view of Santa Maria Della Salute Basilica

Weather in September

In September, Venice begins to transition from summer to fall. Temperatures begin to cool down with the maximum average going down to 23.5°C (74.3°F), creating a pleasant climate. There's a slight uptick in rainfall compared to the dry summer, providing a refreshing change. As the number of daylight hours decline, the city renders an equally enchanting aura during the twilight hours. With the summer crowd receding, it's an ideal time to soak in the architectural and aesthetic beauty of Venice.

Temperature

September ushers in a minor alteration in Venice's climate, with the average high-temperature moving from August's warm 27.5°C (81.5°F) to a still moderately hot 23.5°C (74.3°F). Venice records an average low of 14.3°C (57.7°F) throughout the nights in September.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Venice, during September, the rain falls for 5.9 days and regularly aggregates up to 72mm (2.83") of precipitation. Throughout the year, there are 78.3 rainfall days, and 748mm (29.45") of precipitation is accumulated.

Sea temperature

In Venice, the average seawater temperature in September is 23.6°C (74.5°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 23.6°C (74.5°F).

Daylight

The average length of the day in September is 12h and 32min.
On the first day of the month, sunrise is at 06:32 and sunset at 19:48. On the last day of September, sunrise is at 07:08 and sunset at 18:52 CEST.

Sunshine

In September, the average sunshine in Venice is 6.6h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 5 in September translates into the following instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be mindful! Sand and water reflections can up the Sun's UV exposure.
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Frequently asked questions

What are September temperatures in Venice?

In September, the average high-temperature and low-temperature in Venice, Italy, are 23.5°C (74.3°F) and 14.3°C (57.7°F) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is estimated at 30°C (86°F).

What is the average humidity in September in Venice?

The average relative humidity in September in Venice is 75%.

How many days does it rain in September in Venice?

In Venice, Italy, in September, it is raining for 5.9 days, with typically 72mm (2.83") of accumulated precipitation.

What is the water temperature in September in Venice?

In Venice, the average seawater temperature in September is 23.6°C (74.5°F). 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 23.6°C (74.5°F).

What is the average length of the day in September in Venice?

In Venice, Italy, the average day length in September is 12h and 32min.

When are sunrise and sunset in September in Venice?

In September, on the first day of the month, sunrise is at 06:32 and sunset at 19:48. On the last day of the month, in Venice, Italy, sunrise is at 07:08 and sunset at 18:52 CEST.

How many hours of sunshine does Venice have in September?

In Venice, Italy, the average sunshine duration in September is 6.6h.

How high is the UV index in September in Venice?

In Venice, Italy, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
Venice, Italy

Average temperature in September - Venice, Italy
  • Average high temperature in September: 23.5°C

The warmest month (with the highest average high temperature) is July (27.7°C).
The month with the lowest average high temperature is January (6.6°C).

  • Average low temperature in September: 14.3°C

The month with the highest average low temperature is July (18.3°C).
The coldest month (with the lowest average low temperature) is January (-0.1°C).

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Average humidity in September
Venice, Italy

Average humidity in September - Venice, Italy
  • Average humidity in September: 75%

The months with the highest relative humidity are January and December (81%).
The month with the lowest relative humidity is July (71%).

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Average rainfall in September
Venice, Italy

Average rainfall in September - Venice, Italy
  • Average rainfall in September: 72mm

The wettest month (with the highest rainfall) is June (78mm).
The driest month (with the least rainfall) is January (47mm).

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Average rainfall days in September
Venice, Italy

Average rainfall days in September - Venice, Italy
  • Average rainfall days in September: 5.9 days

The month with the highest number of rainy days is June (8.6 days).
The month with the least rainy days is February (5.2 days).

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Average sea temperature in September
Venice, Italy

Average sea temperature in September - Venice, Italy
  • Average sea temperature in September: 23.6°C

The best months for swimming (with the highest average sea temperature) are July and August (25.4°C).
The coldest month (with the lowest average sea temperature) is February (8.8°C).

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Average daylight in September /
Average sunshine in September
Venice, Italy

Average daylight in September / Average sunshine in September - Venice, Italy
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in September: 6h and 4min

The month with the most sunshine is July (Average sunshine: 9h and 18min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).

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Average UV index in September
Venice, Italy

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

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

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Venice, Italy

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