Click on a day for an hourly weather forecast
The weather in Cagliari in September is hot. The average temperatures are between 20°C and 27°C.
You can expect about 3 to 8 days of rain in Cagliari during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Cagliari in September 2025.
If you’re planning to visit Cagliari in the near future, we highly recommend that you review the 14 day weather forecast for Cagliari before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 14° / 7° | 4 | 27 | 0 | 54 mm | Good | Cagliari in January |
| February | 14° / 7° | 3 | 25 | 0 | 48 mm | Good | Cagliari in February |
| March | 16° / 8° | 3 | 28 | 0 | 54 mm | Good | Cagliari in March |
| April | 19° / 10° | 4 | 26 | 0 | 67 mm | Good | Cagliari in April |
| May | 23° / 14° | 3 | 29 | 0 | 59 mm | Perfect | Cagliari in May |
| June | 27° / 18° | 1 | 29 | 0 | 19 mm | Perfect | Cagliari in June |
| July | 31° / 21° | 1 | 30 | 0 | 10 mm | Good | Cagliari in July |
| August | 31° / 22° | 1 | 30 | 0 | 24 mm | Good | Cagliari in August |
| September | 27° / 20° | 3 | 27 | 0 | 56 mm | Perfect | Cagliari in September |
| October | 23° / 16° | 3 | 28 | 0 | 60 mm | Perfect | Cagliari in October |
| November | 18° / 12° | 4 | 26 | 0 | 99 mm | Good | Cagliari in November |
| December | 15° / 9° | 2 | 29 | 0 | 47 mm | Good | Cagliari in December |