Climate - Alghero (Sardinia)

The climate of Alghero, capital of the Riviera del Corallo, is Mediterranean, with mild, relatively rainy winters and hot, sunny summers.
The city is located on the northwest coast of Sardinia, an island exposed to the Mistral, a cool, sometimes cold, and dry wind blowing from the north-west.
The average temperature of the coldest months (January, February) is of 9.5 °C (49 °F), that of the warmest month (August) is of 25 °C (77 °F). Here are the average temperatures.

Precipitation amounts to 570 millimeters (22.4 inches) per year. It ranges from 5 mm (0.2 in) in the driest month (July) to 80 mm (3.1 in) in the wettest ones (October, November). The rains are not abundant, however they are more abundant than in southern Sardinia, where they drop even below 450 mm (17.5 in) per year. Here is the average precipitation.

Winter, from December to February, is mild, and is characterized by sunny periods alternating with rainy periods.
On the coldest nights of the year, the temperature typically drops to -1/-2 °C (28/30 °F), but can occasionally drop to lower values. For example, it dropped to -5 °C (23 °F) in January 1981, and to -4 °C (25 °F) in January 1995 and in February 2012. Snow can occasionally fall, as happened in February 1956, January 1985 and February 2012.

Summer, from June to August, is hot and sunny, with very rare rains.
Generally, the temperatures are not too high and the breeze blows, however, heatwaves of African origin can sometimes occur. The temperature reaches at least 37/38 °C (99/100 °F) almost every year, but at times it can reach or exceed 40 °C (104 °F). In late July 1983, it reached 42 °C (107.5 °F), and there were 5 days with highs of at least 40 °C (104 F). In August 2003, it reached 40 °C (104 °F), and the average of the highs for the whole month was 36 °C (97 °F). In early August 2017, it reached 42 °C (107.5 °F) again, and there were 5 days in a row with highs of at least 40 °C (104 °F).



On average, there are around 2,610 sunshine hours per year. Therefore, the amount of sunshine is good. There may be sunny periods even in winter, while in summer, the sky is normally clear. Here are the average sunshine hours per day.

The sea temperature ranges between 14 °C (57 °F) and 25 °C (77 °F). The sea is warm enough for swimming from July to September. Here are the average sea temperatures.

Best Time

The best time to visit Alghero for a beach holiday is the summer, from June to August. The sea temperature is comfortable enough from July to September, although in September, which in any case is still a good month (especially in the first half), the first periods of bad weather can occur.

Back to the climate of Sardinia.

Alghero - Weather by month

Based on the period 1991-2020

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In January, the weather in Alghero is usually mild. The average temperature is of 9.6 °C (49 °F), with a minimum of 4.9 °C (40.9 °F) and a maximum of 14.3 °C (57.8 °F).
On the coldest nights of the month, the temperature usually drops to around -1 °C (30 °F). However, it dropped to -4.3 °C (24.3 °F) in January 1995.
On the warmest days of the month, the temperature usually reaches around 18 °C (64.5 °F). However, it reached 21.6 °C (70.9 °F) in January 2018.
Precipitation amounts to 70 mm (2.8 in), distributed over 8 days.
The day lasts on average 9 hours and 40 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 14.5 °C (58 °F). Therefore, the sea is very cold for swimming.

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In February, the coldest month of the year, the weather in Alghero is usually mild. The average temperature is of 9.6 °C (49 °F), with a minimum of 4.6 °C (40.4 °F) and a maximum of 14.5 °C (58 °F).
On the coldest nights of the month, the temperature usually drops to around -1 °C (30.5 °F). However, it dropped to -4 °C (24.8 °F) in February 2012.
On the warmest days of the month, the temperature usually reaches around 18.5 °C (65.5 °F). However, it reached 25 °C (77 °F) in February 2004.
Precipitation amounts to 55 mm (2.2 in), distributed over 8 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 14 °C (57 °F). Therefore, the sea is very cold for swimming.

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In March, the weather in Alghero is usually mild. The average temperature is of 11.4 °C (52 °F), with a minimum of 6.2 °C (43.1 °F) and a maximum of 16.6 °C (61.8 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 0 °C (32 °F). However, it dropped to -2 °C (28.4 °F) in March 1993.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 22.5 °C (72 °F). However, it reached 28 °C (82.4 °F) in March 2016.
Precipitation amounts to 60 mm (2.4 in), distributed over 7 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).
The average sea temperature is of 14 °C (57 °F). Therefore, the sea is very cold for swimming.

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In April, the weather in Alghero is usually mild. The average temperature is of 13.8 °C (57 °F), with a minimum of 8.2 °C (46.8 °F) and a maximum of 19.3 °C (66.8 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 2.5 °C (36.5 °F). However, it dropped to -2.4 °C (27.7 °F) in April 1995.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 26 °C (79 °F). However, it reached 31.7 °C (89.1 °F) in April 2003.
Precipitation amounts to 50 mm (2 in), distributed over 7 days.
The day lasts on average 13 hours and 20 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 15 °C (59 °F). Therefore, the sea is cold for swimming.

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In May, the weather in Alghero is usually very mild. The average temperature is of 17.6 °C (64 °F), with a minimum of 11.6 °C (52.9 °F) and a maximum of 23.6 °C (74.5 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 6.5 °C (43.5 °F). However, it dropped to 3 °C (37.4 °F) in May 2019.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 30.5 °C (87 °F). However, it reached 37 °C (98.6 °F) in May 2009.
Precipitation amounts to 25 mm (1 in), distributed over 4 days.
The day lasts on average 14 hours and 30 minutes. So the days are long.
There are on average 8.5 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 17.5 °C (63.5 °F). Therefore, the sea is cold for swimming.

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In June, the weather in Alghero is usually warm. The average temperature is of 21.7 °C (71 °F), with a minimum of 15.4 °C (59.7 °F) and a maximum of 28.1 °C (82.6 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 10.5 °C (50.5 °F). However, it dropped to 7.6 °C (45.7 °F) in June 2006.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 35 °C (95.5 °F). However, it reached 39.8 °C (103.6 °F) in June 2012.
Precipitation amounts to 15 mm (0.6 in), distributed over 2 days.
The day lasts on average 15 hours and 0 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 10 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 69%.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 21 °C (70 °F). Therefore, the sea is cool for swimming.

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In July, the weather in Alghero is usually warm to hot. However, there are remarkable differences between night and day. The average temperature is of 24.5 °C (76 °F), with a minimum of 18 °C (64.3 °F) and a maximum of 31.1 °C (87.9 °F).
On the coldest nights of the month, the temperature usually drops to around 13.5 °C (56.5 °F). However, it dropped to 10 °C (50 °F) in July 1993.
On the warmest days of the month, the temperature usually reaches around 37.5 °C (99.5 °F). However, it reached 40.6 °C (105.1 °F) in July 2017.
Precipitation amounts to only 5 mm (0.2 in), and all occurs in one day.
The day lasts on average 14 hours and 40 minutes. So the days are long.
There are on average 11.5 hours of sunshine per day. So, the sun shines 77% of the time.
The average humidity is 66%.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 24 °C (75 °F). Therefore, the sea is warm enough for swimming.

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In August, the warmest month of the year, the weather in Alghero is usually warm to hot. However, there are remarkable differences between night and day. The average temperature is of 24.9 °C (77 °F), with a minimum of 18.2 °C (64.8 °F) and a maximum of 31.5 °C (88.7 °F).
On the coldest nights of the month, the temperature usually drops to around 14 °C (57 °F). However, it dropped to 11.6 °C (52.9 °F) in August 1993.
On the warmest days of the month, the temperature usually reaches around 37.5 °C (99.5 °F). However, it reached 42 °C (107.6 °F) in August 2017.
Precipitation amounts to 25 mm (1 in), distributed over 2 days.
The day lasts on average 13 hours and 40 minutes.
There are on average 10 hours of sunshine per day. So, the sun shines 75% of the time.
The average humidity is 67%.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 25 °C (77 °F). Therefore, the sea is warm enough for swimming.

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In September, the weather in Alghero is usually warm. The average temperature is of 21.6 °C (71 °F), with a minimum of 15.7 °C (60.3 °F) and a maximum of 27.4 °C (81.4 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 10.5 °C (50.5 °F). However, it dropped to 5.8 °C (42.4 °F) in September 2001.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 33 °C (91.5 °F). However, it reached 38.1 °C (100.6 °F) in September 2011.
Precipitation amounts to 40 mm (1.6 in), distributed over 4 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 23.5 °C (74.5 °F). Therefore, the sea can be considered barely acceptable for swimming.

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In October, the weather in Alghero is usually warm. The average temperature is of 18.3 °C (65 °F), with a minimum of 12.8 °C (55 °F) and a maximum of 23.7 °C (74.7 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 7.5 °C (45.5 °F). However, it dropped to 1.8 °C (35.2 °F) in October 2007.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 29.5 °C (85.5 °F). However, it reached 33.1 °C (91.6 °F) in October 2003.
Precipitation amounts to 80 mm (3.1 in), distributed over 7 days.
The day lasts on average 11 hours and 5 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 21.5 °C (70.5 °F). Therefore, the sea is cool for swimming.

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In November, the weather in Alghero is usually mild. The average temperature is of 14.0 °C (57 °F), with a minimum of 9.2 °C (48.6 °F) and a maximum of 18.7 °C (65.7 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 3 °C (37 °F). However, it dropped to -1.1 °C (30 °F) in November 1995.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 24.5 °C (76 °F). However, it reached 27.8 °C (82 °F) in November 2011.
Precipitation amounts to 80 mm (3.1 in), distributed over 8 days.
The day lasts on average 9 hours and 55 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 18.5 °C (65.5 °F). Therefore, the sea is very cool for swimming.

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In December, the weather in Alghero is usually mild. The average temperature is of 10.9 °C (52 °F), with a minimum of 6.3 °C (43.4 °F) and a maximum of 15.4 °C (59.7 °F).
On the coldest nights of the month, the temperature usually drops to around 0 °C (32 °F). However, it dropped to -3.4 °C (25.9 °F) in December 1999.
On the warmest days of the month, the temperature usually reaches around 20 °C (67.5 °F). However, it reached 22.6 °C (72.7 °F) in December 2010.
Precipitation amounts to 65 mm (2.6 in), distributed over 7 days.
The day lasts on average 9 hours and 20 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 3.5 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 16 °C (60.5 °F). Therefore, the sea is cold for swimming.