Naples Weather in September
During September, Naples experiences high daytime temperatures of 25°C (77°F) and cooler nights around 20°C (68°F). As part of the summer season, expect quite a bit of rainfall. Around 96 mm (3.8 in) is typical.
Rainfall in Naples in September
Looking at the last 30 years, the data shows about 9 days with rain, averaging 96 mm (3.8 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Naples in September
Naples in September is worth a visit. The temperature is perfect, with 25°C (77°F) during the day and 20°C (68°F) at night. The summer season is characteristic of September. Overall, the month follows a fairly predictable daily temperature pattern. With lows of 20°C (68°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Naples in September
Expect a lot of sunshine this month, with about 234 hours of sun. These sunny conditions add to the overall experience.
Average water temperature in September
The water is 25°C (77°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.If your ideal day consists of dry skies and pleasant temperatures, May, June, July, August and September typically offer the best circumstances for Naples.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Italy, check out our Naples's climate page.
Naples Temperature in September
Min Temperature
20°C (68°F)
Max Temperature
25°C (77°F)
Water Temperature
25°C (77°F)
Chance of Rain
29%
Precipitation
96 mm (3.8 in)
Rainy days
9 days
Humidity
73%
Sunshine
234 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Naples typically drop from around 28°C (82°F) at the start of September to approximately 25°C (77°F) by the end. Nights are pleasant, with lows typically ranging from 15°C (59°F) to 19°C (66°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Naples in September
Browse day-by-day weather records for Naples spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Naples historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Naples.
- Naples recorded its highest September temperature of 37°C (99°F) on September 4, 1982.
- The lowest daytime temperature in September was 17°C (63°F), recorded on September 29, 2002.
- The lowest overnight temperature recorded in September was 8°C (46°F) (September 29, 1978).
Best Places in Italy in September
Find out more about the weather in Italy and which places have the best travel conditions in this month. See all of Italy in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Naples in September
Warm but pleasant conditions in Naples in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. With water temperatures around 25°C (77°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Naples in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Italy, check out our Naples's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Naples climate overview or explore weather in Italy.
