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Cagliari Weather in September
September in Cagliari sees daytime temperatures around 28°C (82°F) and lows of 19°C (66°F) at night. The excellent weather makes it a good time to visit.
Rainfall in Cagliari in September
This month experiences about 7 days of rain according to historical data, averaging 34 mm (1.3 in). The occasional light shower is possible, but rain is rarely an issue this month.
Temperature in Cagliari in September
September in Cagliari is generally excellent, with days reaching 28°C (82°F) and nights settling around 19°C (66°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Cagliari in September
Enjoy a sunny month with about 244 hours of sunshine, the clear skies make Cagliari even more beautiful.
Average water temperature in September
With water at 23°C (73°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period, it feels comfortable straight away.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, September and October typically offer the best weather for Cagliari.
Cagliari Temperature in September
Min Temperature
19°C (66°F)
Max Temperature
28°C (82°F)
Water Temperature
23°C (73°F)
Chance of Rain
22%
Precipitation
34 mm (1.3 in)
Rainy days
7 days
Humidity
71%
Sunshine
244 hours
Percentage Sunshine
61%
Cagliari Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Cagliari - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cagliari typically drop from around 29°C (84°F) at the start of September to approximately 26°C (79°F) by the end. Nights are pleasant, with lows typically ranging from 16°C (61°F) to 19°C (66°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Cagliari in September
Browse day-by-day weather records for Cagliari spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cagliari historical weather extremes in September
Based on 50 years of weather observations in Cagliari between 1976 and 2026, these are the recorded extremes.
- The hottest September day on record in Cagliari reached 37°C (99°F) (September 3, 2026).
- On September 23, 1979, Cagliari saw its coldest September day with temperatures maxing out at 19°C (66°F).
- Cagliari registered its coldest September night on September 19, 2001, with temperatures dropping to 9°C (48°F).
Best Places in Sardinia in September
Find out more about the weather in Sardinia and which places have the best travel conditions in this month. See all of Sardinia in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Cagliari in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Some rain is possible, so pack something to handle light showers. The water temperature sits at about 23°C (73°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Cagliari in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming10/10 -
Cycling8/10 -
Walking8/10 -
Barbeque10/10 -
Camping10/10 -
Outdoor sports8/10
Cagliari 3-Day Forecast
More climate data for Cagliari
Temperature Rainfall Sunshine Humidity Water Temp
See the full Cagliari climate overview or explore weather in Sardinia.
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Where to go in September - average daytime high across popular destinations.
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