Olbia weather in September
September in Olbia: warm, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Olbia · #215 of 897 destinations to visit in September · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Olbia in September
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Olbia climate normals — September
| Daytime high | 27°C / 81°F | 🌤 warm |
|---|---|---|
| Nighttime low | 20°C / 69°F | |
| Rainfall | 35 mm / 1.4 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 70% | 💧 humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 10.7 h/day | |
| Daylight | 12.5 h | |
| Wind | 20 km/h / 13 mph | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Olbia in September — FAQ
- Is September a good time to visit Olbia?
- September in Olbia: warm, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Olbia on SeasonMap's comfort score (89/100).
- What is the weather like in Olbia in September?
- In September, Olbia averages a daily high of 27.3°C and a low of 20.3°C, with about 35.2 mm of rain over roughly 6.2 rainy days.
- What is the air quality in Olbia in September?
- Olbia has a mean US Air Quality Index of about 43 in September.