Weather in Alghero in September 2025
Average weather
Average temperature in Alghero in September
Going from a maximum of +33°C during the day to a minimum of +18°C during the night, the temperature in September averages around +27°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +25°C to +25°C.
Is Alghero warm or cold in September?
Alghero is typically warm in September.
Maximum temperatures go down compared to the previous month from +29°C to +26°C. The minimum temperature also goes down from +22°C to +19°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is one of the warmest months in Alghero, here is the comparison with other months:
Water temperature in Alghero in September
Water in Alghero in September is Comfortable. It varies from +21°C to +26°C, with an average of +23°C. This is almost similar to the air temperature, which averages +26°C.
The water temperature in September is one of the warmest of the entire year:
Can you swim in Alghero in September?
Climate in Alghero in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +26°C | +22°C | ||||
| Min. temperature | ||||||
| +12°C | +9°C | +7°C | ||||
| Max. temperature | ||||||
| +41°C | +34°C | +32°C | ||||
| Rainfall | ||||||
| 8 mm | 32 mm | 63 mm | ||||
| Wind | ||||||
| 2 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +24°C | +23°C | +21°C | ||||
| Humidity | ||||||
| 71% | 74% | 77% | ||||
| Air pressure | ||||||
| 1014 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 24 | 17 | 12 | ||||
| Cloudy days | ||||||
| 3 | 4 | 6 | ||||
| Rainy days | ||||||
| 3 | 5 | 9 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as great as in August. It’s getting colder in September. From +29°C in the day, the average maximum temperature lowers to +26°C. Prepare for more rain. Average rainfall goes from 8 mm to 32 mm. Humidity rises from 71% to 74%. Winds are stronger in comparison to August, going up from 2 m/s to 3 m/s on average. The days becoming less sunny, going from 24 sunny days in August to 17 in September.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 2 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Alghero is gradually increasing during September, going from 2 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Alghero?
Climate Change over Years
The climate in Alghero in September has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+18°C) and the highest in 2017 (+22°C). The driest year was 2017 with only 311 mm of rainfall, and the wettest year was 2010 with 759 mm.
FAQ
Is September a good time to visit Alghero?
Can you sunbathe in Alghero in September?
Can you swim in Alghero in September?
Is Alghero rainy in September?
Is it sunny in Alghero in September?
Other cities in Italy
Monthly weather in Alghero
Source of the data
For this page, we’ve looked at the typical weather in Alghero, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.