Cagliari, Sardinia weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: June – September
What is the weather like in Cagliari, Sardinia in September?
In September, Cagliari, Sardinia is hot: daytime highs average 28 °C, and nights cool down to about 19 °C. The sea averages 24.6 °C – pleasant for swimming. The sun shines for around 9 hours a day. Rain is rare: about 4 days bring 26 mm in total. On about 6 days the thermometer climbs to 30 °C or more. All in all, September is an excellent month for a holiday in Cagliari, Sardinia.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 96 | 99 | 76 |
| Day | 32° | 28° | 23° |
| Night | 22° | 19° | 16° |
| Sea | 26° | 25° | 22° |
| Sun | 11 h | 9 h | 8 h |
| Rain days | 1 | 4 | 6 |
More details for September
- Daylight
- 12 h 31 min07:04 – 19:34
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 10 daysdew point 18 °C or more
- Wind
- 19 km/haverage daily peak
- Cloud cover
- 36 %on average
- Hot days
- 6 days30 °C or more
- Time zone
- UTC+2Europe/Rome
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %98 %
- Few rainy daysweight 20 %99 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
Cagliari, Sardinia in September: quick answers
Is Cagliari, Sardinia hot in September?
Yes. In September, Cagliari, Sardinia is hot: daytime highs average 28 °C and nights stay around 19 °C. On about 6 days the thermometer climbs to 30 °C or more.
Can you swim in Cagliari, Sardinia in September?
Yes. In September the sea averages 24.6 °C – pleasant for swimming.
Does it rain much in Cagliari, Sardinia in September?
Rain is rare: about 4 days bring 26 mm in total.
Cagliari, Sardinia month by month
The whole year in Cagliari, SardiniaAll destinations: ItalyWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)