Cagliari is warmest in August, averaging 29° by day and 24° at night. The wettest month is December with 183 mm, and the year brings about 744 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 14° | 11° | 53 mm | 15° | 9.5 h | Mild |
| February | 15° | 11° | 25 mm | 14° | 10.5 h | Mild |
| March | 15° | 12° | 40 mm | 14° | 11.7 h | Mild |
| April | 17° | 14° | 60 mm | 16° | 13.0 h | Sightseeing |
| May | 21° | 16° | 50 mm | 18° | 14.2 h | Sightseeing |
| June | 25° | 20° | 48 mm | 23° | 14.7 h | Sightseeing |
| July | 29° | 23° | 0 mm | 25° | 14.5 h | Beach weather |
| August | 29° | 24° | 19 mm | 26° | 13.5 h | Beach weather |
| September | 26° | 22° | 42 mm | 25° | 12.2 h | Beach weather |
| October | 23° | 19° | 50 mm | 22° | 10.9 h | Sightseeing |
| November | 19° | 16° | 174 mm | 19° | 9.8 h | Mild |
| December | 16° | 13° | 183 mm | 16° | 9.3 h | Mild |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: July, August and September — highs around 28°, nights no colder than 22°, and at most 42 mm of rain in a month. The sea sits at 25–26° then.
Walking the city: April, May, June and October — highs of 17–25° and no more than 60 mm of rain a month.