September weather forecast
Venice, Italy

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.