September · Italy
Best time to visit Cagliari in September Weather, crowds & prices
Weather in Cagliari in September
Average temperature 25°C, 25 mm of rain, about 21 days with 6+ hours of sunshine and 73% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.7/10
Ranked #4 of 12 months
- Avg temp
- 25°C
- Rainfall
- 25 mm
- Humidity
- 73%
- Days with 6h+ sun
- 21
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Cagliari scores 9.7/10 for beach and coastal travel - an above-average month (#4 of 12). Expect around 25°C, 25 mm of rain, and roughly 21 days with 6+ hours of sunshine this month.
Sardinia's hilltop capital pairs Castello ramparts with Poetto beach best from May through October, when warm seas and breezy evenings frame the Gulf of Cagliari.
September ranks 4th of 12 for Cagliari — one of the best windows
September averages 25°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 21 days with 6+ hours of sunshine and 12.2 daylight hours.
A 9.7/10 puts this among the year's best months in Cagliari (4th of 12); only July scores higher, at 9.9/10.
Pack light clothing, swimwear and real sun protection.
Plan for peak pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Cagliari in September?
- In September, Cagliari averages 25°C, 25 mm of rain, and about 21 days with 6+ hours of sunshine. Its climate-comfort score is 9.7/10.
- Is September a good time to visit Cagliari?
- September earns a 9.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Cagliari in September?
- Expect about 25 mm of rain in September. Average humidity is 73% and there are about 21 days with 6+ hours of sunshine.
Curated in Cagliari
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Cagliari, Italy. Live activities and tours from GetYourGuide, matched to this destination.