September weather forecastRovinj, Croatia
September
Weather in September
September in Rovinj marks the start of the fall season, bringing with it a steady decline in temperature after the hot summer months. The city returns to its regular rhythm, with temperatures cooling down from August's peaks. The sea remains warm, perfect for late-season swimmers or those who enjoy a less crowded coastline. Changes in the weather pattern become noticeable towards the end of the month, setting the stage for the transition into October's cooler climes.Temperature
September's onset brings a negligible change in high-temperatures, falling from a moderately hot 28.7°C (83.7°F) in August to a still warm 24.6°C (76.3°F). During September, Rovinj records an average temperature of 14°C (57.2°F) at night.Humidity
In Rovinj, the average relative humidity in September is 76.3%.Rainfall
In Rovinj, during September, the rain falls for 7.9 days and regularly aggregates up to 83mm (3.27") of precipitation. In Rovinj, during the entire year, the rain falls for 102.1 days and collects up to 811mm (31.93") of precipitation.Snowfall
In Rovinj, Croatia, snow does not fall in April through December.Sea temperature
In Rovinj, the average seawater temperature in September is 23.7°C (74.7°F).Note: Think about diving into 23.7°C (74.7°F) waters. Factors like your sensitivity to cold, the brightness of the sun, wind conditions, and the day's warmth play a role. For reference, Olympic swimming competitions use waters between 25°C (77°F) and 28°C (82.4°F).
Daylight
In Rovinj, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 06:27 and sunset at 19:42. On the last day of September, sunrise is at 07:02 and sunset at 18:47 CEST.
Sunshine
In September, the average sunshine in Rovinj is 7.7h.UV index
In September, the average daily maximum UV index in Rovinj is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Attention! UV radiation is markedly stronger with water and sand reflections.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rovinj, Croatia
- Average high temperature in September: 24.6°C
The warmest month (with the highest average high temperature) is August (28.7°C).
The month with the lowest average high temperature is January (9.6°C).
- Average low temperature in September: 14°C
The months with the highest average low temperature are July and August (17.2°C).
The coldest month (with the lowest average low temperature) is February (1.6°C).
Average humidity in September
Rovinj, Croatia
- Average humidity in September: 76.3%
The month with the highest relative humidity is January (82.1%).
The month with the lowest relative humidity is July (67.7%).
Average rainfall in September
Rovinj, Croatia
- Average rainfall in September: 83.1mm
The wettest month (with the highest rainfall) is November (98.3mm).
The driest month (with the least rainfall) is July (40.7mm).
Average rainfall days in September
Rovinj, Croatia
- Average rainfall days in September: 7.9 days
The month with the highest number of rainy days is April (10.5 days).
The month with the least rainy days is July (5.8 days).
Average snowfall days in September
Rovinj, Croatia
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Rovinj, Croatia
- Average sea temperature in September: 23.7°C
The best month for swimming (with the highest average sea temperature) is August (25.2°C).
The coldest month (with the lowest average sea temperature) is February (9.8°C).
Average daylight in September /
Average sunshine in September
Rovinj, Croatia
- Average daylight in September: 12h and 30min
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: 7h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 0min).
Average UV index in September
Rovinj, Croatia
- 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).
