Cagliari weather in September
September in Cagliari: warm, dry, with clean air — one of the best months to visit.
#2 of 12 months in Cagliari · #65 of 897 destinations to visit in September · comfort 93/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cagliari in September
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Cagliari climate normals — September
| Daytime high | 29°C / 84°F | 🌤 warm |
|---|---|---|
| Nighttime low | 20°C / 68°F | |
| Rainfall | 23 mm / 0.9 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 67% | 💧 humid |
| Dew point | 17°C / 63°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 12.4 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 49 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cagliari in September — FAQ
- Is September a good time to visit Cagliari?
- September in Cagliari: warm, dry, with clean air — one of the best months to visit. It ranks #2 of 12 months for Cagliari on SeasonMap's comfort score (93/100).
- What is the weather like in Cagliari in September?
- In September, Cagliari averages a daily high of 28.9°C and a low of 19.8°C, with about 23.1 mm of rain over roughly 4 rainy days.
- What is the air quality in Cagliari in September?
- Cagliari has a mean US Air Quality Index of about 49 in September.