What September feels like in Naples
In Naples, September brings early autumn. Days are warm enough for short sleeves, and time outdoors is easy. The gap between afternoon and night is small, so nights stay mild and the temperature hardly changes after dark. Some humidity hangs in the air, noticeable when the sun is strong.
Rain in Naples in September
Expect a mix of dry and wet days, with rain about one day in 3. Rain tends to come in heavy bursts: about 11.2 mm (0.4 in) on an average rainy day. Across the year Naples averages about 9.6 mm per rainy day, so September is typical.
Daylight and sunshine in September
In mid-September, sunrise is at about 6:42 am and sunset at about 7:14 pm (local time) — 12 h 32 min of daylight. Days are getting shorter: 1 h 19 min less daylight than in mid-August. Measured sunshine covers about 85% of the daylight — skies are mostly clear.
How September compares to the rest of the year
September is the 4th warmest month of the year in Naples. Against August, the average high is 4.1°C (7.4°F) lower, with 77 mm more rain. Temperatures keep falling into October. By October, typical highs are 21.7°C (71.1°F).
Who September suits
- Sightseeing: a good fit — the weather rarely gets in the way of a city walk.
- Parks & outdoor: a good fit — comfortable for long walks and picnics.
- Beach: less ideal — too many rainy days.
Tips for visiting Naples in September
Rain Protection
Keep a small umbrella in your bag and wear shoes that cope with puddles.
Sunglasses
Plenty of sun, so bring sunglasses and a cap.
Quick questions
How warm is Naples in September?
Afternoons average 26°C (78.8°F) and nights about 18.2°C (64.8°F) — warm by most people's standards. It is the 4th warmest month of the year.
Does it rain a lot in Naples in September?
It does: about 9 rainy days bring roughly 101 mm, so plan some indoor options.
What should I wear in Naples in September?
The numbers point to rain protection and sunglasses. Evenings feel similar to the day, so the same clothes work from morning to night.
Is September or October better for visiting Naples?
September scores better on our climate ranking (#4 of 12 vs #6), rated Great against Great. October is cooler and has more rainy days.