September weather - Autumn 2024

Weather in September
Frequently asked questions
Average temperature in September
Average pressure in September
Average wind speed in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average snowfall days in September
Average sea temperature in September
Average daylight in September
Average sunshine in September
Average sunshine days in September
Average UV index in September
Average cloud cover in September
Average visibility in September

Sunset over the colorful old town of Cagliari in Italy

Weather in September

Cagliari’s weather begins to cool down in September, with temperature dropping to a comfortable 26.2°C (79.2°F). This marks the onset of the pleasant autumn season, making it a popular time for tourists to enjoy sightseeing and outdoor events. However, September also shows an increase in rainfall, humidity, and cloud cover. People continue to flock to the beach, capitalizing on the sea's lingering warmth, which remains at around 23.9°C (75°F).

Temperature

As August shifts into September in Cagliari, a minor alteration in temperatures is observed, with average highs reducing from a tropical 30.6°C (87.1°F) to a warm 26.2°C (79.2°F). September nights cool down to an average low-temperature of 19.4°C (66.9°F).

Humidity

In September, the average relative humidity in Cagliari is 68%.

Rainfall

In Cagliari, Italy, during September, the rain falls for 8.4 days and regularly aggregates up to 21mm (0.83") of precipitation. In Cagliari, Italy, during the entire year, the rain falls for 107.7 days and collects up to 284mm (11.18") of precipitation.

Snowfall

January, March through November are months without snowfall.

Sea temperature

In September, the average sea temperature in Cagliari is 23.9°C (75°F).
Note: If you're wary of the cold, the surrounding conditions—sunshine, wind, and air temperature become crucial when swimming in 23.9°C (75°F) waters. Olympic standards, for reference, are set between 25°C (77°F) and 28°C (82.4°F).

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September in Cagliari, Italy, sunrise is at 06:52 and sunset at 19:54. On the last day of the month, sunrise is at 07:19 and sunset at 19:07 CEST.

Sunshine

The average sunshine in September in Cagliari is 10.3h.

UV index

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 6 in September translates into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be on guard! The reflective nature of sand and water boosts UV exposure.

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Frequently asked questions

What is the temperature in September in Cagliari?

The average high-temperature, in September, in Cagliari, is 26.2°C (79.2°F), while the average low-temperature is 19.4°C (66.9°F). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 34°C (93.2°F).

What is the average humidity in September in Cagliari?

The average relative humidity in September is 68%.

How much does it rain in Cagliari in September?

In Cagliari, during September, the rain falls for 8.4 days and regularly aggregates up to 21mm (0.83") of precipitation.

When it does not snow in Cagliari?

January, March through November are months without snowfall in Cagliari.

What is the sea temperature in September in Cagliari?

In September, the average sea temperature in Cagliari, Italy, is 23.9°C (75°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 23.9°C (75°F) water.

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

In September, the average day length is 12h and 26min.

What time are sunrise and sunset in September in Cagliari?

On the first day of September in Cagliari, sunrise is at 06:52 and sunset at 19:54. On the last day of the month, sunrise is at 07:19 and sunset at 19:07 CEST.

How long on average sun shines in September in Cagliari?

In September, the average sunshine duration in Cagliari, Italy, is 10.3h.

What is the UV index intensity in September in Cagliari?

In Cagliari, Italy, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

30.6°C 87.1°F

26.2°C 79.2°F

22.6°C 72.7°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

12.4km/h 7.7mph

12.2km/h 7.6mph

14km/h 8.7mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

3.8

8.4

9.1

Average snowfall days

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

25.2

19.8

19.9

Average UV index

Average cloud cover

15%

21%

Average visibility

10km 6.2mi

Average temperature in September
Cagliari, Italy

Average high temperature in September: 26.2°C

The warmest month (with the highest average high temperature) is August (30.6°C).
The months with the lowest average high temperature are January and February (13.4°C).

Average low temperature in September: 19.4°C

The month with the highest average low temperature is August (21.7°C).
The coldest month (with the lowest average low temperature) is February (6.7°C).

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Average pressure in September
Cagliari, Italy

Average pressure in September: 1015.7mbar

The month with the highest atmospheric pressure is December (1019.3mbar).
The month with the lowest atmospheric pressure is April (1014.2mbar).

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Average wind speed in September
Cagliari, Italy

Average wind speed in September: 11.4km/h

The windiest month (with the highest average wind speed) is February (15.9km/h).
The calmest month (with the lowest average wind speed) is August (10.7km/h).

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Average humidity in September
Cagliari, Italy

Average humidity in September: 68%

The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (59%).

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Average rainfall in September
Cagliari, Italy

Average rainfall in September: 21mm

The wettest month (with the highest rainfall) is November (58mm).
The driest month (with the least rainfall) is July (5mm).

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Average rainfall days in September
Cagliari, Italy

Average rainfall days in September: 8.4 days

The month with the highest number of rainy days is November (12.6 days).
The month with the least rainy days is July (3.3 days).

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Average snowfall days in September
Cagliari, Italy

Average snowfall days in September: 0 days

The months with the highest number of snowfall days are February and December (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in September
Cagliari, Italy

Average sea temperature in September: 23.9°C

The best month for swimming (with the highest average sea temperature) is August (24.8°C).
The coldest month (with the lowest average sea temperature) is February (13.8°C).

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

Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

Average sunshine in September: 10h and 2min

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).

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Average sunshine days in September
Cagliari, Italy

Average sunshine days in September: 19.8 days

The month with the most sunshine days is July (26.4 days).
The month with the least sunshine days is November (14.4 days).

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Average UV index in September
Cagliari, Italy

Average UV index in September: 6

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in September
Cagliari, Italy

Average cloud cover in September: 15

The month with the most cloud cover is January (Cloud cover 35).
The months with the least cloud cover are July and August (Cloud cover 7).

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Average visibility in September
Cagliari, Italy

Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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September weather forecast
Cagliari, Italy

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