Your trips
Organize your trips easily with tabs
New York
Cagliari
Any date
+ Search
background

Cagliari in September: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Cagliari in September will be like? Take a look at our weather guide for Cagliari, based on historical data.
Check flight prices to Cagliari on Avionero:
September

Weather in Cagliari in September 2025

Great Weather
Warm
☀️
Sunny
🌊
Comfortable water
September is an ideal time to visit Cagliari if you're seeking a destination with brilliant weather. Anticipate average maximum temperatures of +81°F and about 16 sunny days, ensuring you'll have ample opportunities to soak up the sunshine. It's worth noting, though, that there may be some rainfall, with approximately 25 mm of precipitation over an average of 4 rainy days. So, prepare your sunglasses, a beach towel, and great walking shoes, as it's most likely going to be amazing weather. Search flights in one click on Avionero.

Average weather

☀️
+81°F
Avg. max. temperature
+52°F
Min.
+97°F
Max.
25 mm
Total precipitation
72%
Avg. humidity
3 m/s
Avg. wind
16 ☀️
Sunny Days
4 ⛅️
Cloudy
4 🌦
Rainy
Our opinion: Cagliari has great weather in September.

Average temperature in Cagliari in September

Here are the expected maximum, average and minimum temperatures in Cagliari for September based on the historical data.
Last Year
Historical Data

Going from a maximum of +91°F during the day to a minimum of +59°F during the night, the temperature in September averages around +84°F.

The average maximum temperature goes down 11% by the end of the month, compared with the beginning of the month, from +86°F to +82°F.

Is Cagliari warm or cold in September?

Cagliari is typically warm in September.

Maximum temperatures go down compared to the previous month from +86°F to +81°F. The minimum temperature also goes down from +70°F to +64°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

September is one of the warmest months in Cagliari, here is the comparison with other months:

Water temperature in Cagliari in September

Water in Cagliari in September is Comfortable. It varies from +71°F to +80°F, with an average of +75°F. This is almost similar to the air temperature, which averages +81°F.

The water temperature in September is one of the warmest of the entire year:

The warmest water temperatures in Cagliari are reached in August, when the average sea temperature rises to +77°F. The coldest water temperatures are in February, with an average of +56°F.

Can you swim in Cagliari in September?

The water in Cagliari in September is pretty comfortable (+75°F in average). Ideal for swimming, especially in outdoor pools and open water. Suitable for recreational and casual swimmers.
🦭
Cold
Below +61°F
🏄‍♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
Don’t forget a large beach towel or two for drying off.

Climate in Cagliari in September

Cagliari weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+86°F+81°F+73°F
Min. temperature
+55°F+52°F+41°F
Max. temperature
+104°F+97°F+88°F
Rainfall
6 mm25 mm35 mm
Wind
3 m/s3 m/s3 m/s
Avg. water temperature
+77°F+75°F+71°F
Humidity
66%72%77%
Air pressure
1013 HPa1014 HPa1015 HPa
Sunny days
251612
Cloudy days
348
Rainy days
146
Snowy days
000

September weather is still as great as in August. It’s getting colder in September. From +86°F in the day, the average maximum temperature lowers to +81°F. Prepare for more rain. Average rainfall goes from 6 mm to 25 mm. Humidity rises from 66% to 72%. The average wind speed doesn’t change much during September, staying around 3 m/s. The days becoming less sunny, going from 25 sunny days in August to 16 in September.

Next month (October) brings a further decline in the weather.

Wind

Wind speed in Cagliari in September based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Cagliari is gradually increasing during September, going from 3 m/s to 3 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Cagliari based on historical data.
Last Year
Historical Data
Typically, there is a 3% chance of rain on an average day in September, with total rainfall of approximately 6 mm. The maximum amount of rainfall per day is around 5 mm, which is considered light rain. Cagliari is amazing in September with as little as 1 rainy days on average, so plan adventures in the great outdoors.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Cagliari wettest month is November, where a typical day has a 33% chance of precipitation and 57 mm of rainfall per day. July, on the other hand, is the driest month with a mere 3% chance of precipitation and 1 mm of rainfall per day.

How was the weather last September in Cagliari?

This is the weather in Cagliari in September 2023:
1 September
☀️
+86°F
2 September
☀️
+85°F
3 September
☀️
+84°F
4 September
☀️
+89°F
5 September
☀️
+85°F
6 September
☀️
+84°F
7 September
☀️
+85°F
8 September
☀️
+85°F
9 September
☀️
+84°F
10 September
☀️
+84°F
11 September
☀️
+86°F
12 September
☀️
+87°F
13 September
☀️
+86°F
14 September
☀️
+84°F
15 September
☀️
+86°F
16 September
☀️
+86°F
17 September
☀️
+87°F
18 September
☀️
+92°F
19 September
☀️
+92°F
20 September
☀️
+86°F
21 September
☀️
+86°F
22 September
☀️
+85°F
23 September
☀️
+79°F
24 September
☀️
+78°F
25 September
☀️
+80°F
26 September
☀️
+82°F
27 September
☀️
+83°F
28 September
☀️
+85°F
29 September
☀️
+81°F
30 September
☀️
+82°F
In September 2023 Cagliari had 30 sunny days, 0 cloudy days, and 0 rainy days. The average maximum temperature was +84°F, with an absolute maximum of +91°F and a minimum of +79°F. The average humidity was 69%, with a maximum of 100% and a minimum of 38%. The average wind speed was 3 m/s, with a maximum of 9 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Cagliari climate has changed over the last 43 years.

The climate in Cagliari in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1984 (+66°F) and the highest in 2022 (+74°F). The driest year was 1989 with only 134 mm of rainfall, and the wettest year was 2020 with 1145 mm.

FAQ

Frequently asked questions about the weather in Cagliari in September:

Is September a good time to visit Cagliari?

Yes, September is a great time to go to Cagliari, the weather couldn’t be better. Be ready to get outside, explore and enjoy. Check what other months that are a good time to visit Cagliari.

Can you sunbathe in Cagliari in September?

September is warm in Cagliari. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Can you swim in Cagliari in September?

Yes, the water temperature in Cagliari in September is considered moderate and enjoyable for most people, averaging around +75°F.

Is Cagliari rainy in September?

Cagliari is usually dry in September. Plan your packing around outdoor activities and exploring.

Is it sunny in Cagliari in September?

The amount of sunny days in Cagliari during September varies; prepare for a mix of clouds and sun.

Other cities in Italy

Check out the weather for other cities in Italy.

Monthly weather in Cagliari

Source of the data

For this page, we’ve looked at the typical weather in Cagliari, 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.