Naples is warmest in July, averaging 34° by day and 20° at night. The wettest month is November with 108 mm, and the year brings about 625 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 12° | 4° | 59 mm | 15° | 9.4 h | Cool |
| February | 14° | 5° | 45 mm | 14° | 10.4 h | Mild |
| March | 15° | 6° | 50 mm | 14° | 11.7 h | Mild |
| April | 18° | 9° | 39 mm | 16° | 13.1 h | Sightseeing |
| May | 23° | 13° | 43 mm | 19° | 14.3 h | Sightseeing |
| June | 29° | 17° | 39 mm | 24° | 14.9 h | Beach weather |
| July | 34° | 20° | 12 mm | 27° | 14.7 h | Beach weather |
| August | 33° | 21° | 31 mm | 27° | 13.6 h | Beach weather |
| September | 28° | 17° | 66 mm | 25° | 12.3 h | Beach weather |
| October | 23° | 13° | 62 mm | 22° | 10.9 h | Sightseeing |
| November | 18° | 10° | 108 mm | 20° | 9.7 h | Mild |
| December | 14° | 6° | 71 mm | 17° | 9.1 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: June, July, August and September — highs around 31°, nights no colder than 17°, and at most 66 mm of rain in a month. The sea sits at 24–27° then.
Walking the city: April, May and October — highs of 18–23° and no more than 62 mm of rain a month.