Weather in Naples for September 2026
In general, the average temperature in Naples at the beginning of September is 29.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.9 °C by the end of September.
Naples in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 123.3 mm.
Is September a good time to visit Naples? check out the best time to travel to Naples page.
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Naples Weather September
Temperatures trend during September in Naples
September weather in Naples day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 29° /21° | 4.3 mm | 7 | |
| 2 Sept. | Sunny | 29° /22° | 0.6 mm | 7 | |
| 3 Sept. | Sunny | 29° /22° | 0 mm | 7 | |
| 4 Sept. | Sunny | 29° /22° | 1.2 mm | 7 | |
| 5 Sept. | Sunny | 29° /22° | 1.4 mm | 7 | |
| 6 Sept. | Sunny | 30° /22° | 0.3 mm | 7 | |
| 7 Sept. |  Patchy rain possible | 30° /22° | 0.3 mm | 7 | |
| 8 Sept. | Sunny | 30° /22° | 0.2 mm | 7 | |
| 9 Sept. |  Partly cloudy | 29° /22° | 5.4 mm | 7 | |
| 10 Sept. | Sunny | 29° /22° | 2.4 mm | 6 | |
| 11 Sept. | Sunny | 27° /21° | 1.1 mm | 7 | |
| 12 Sept. | Sunny | 28° /21° | 1.8 mm | 7 | |
| 13 Sept. | Sunny | 27° /20° | 2.1 mm | 7 | |
| 14 Sept. | Sunny | 27° /20° | 0.3 mm | 7 | |
| 15 Sept. | Partly cloudy | 27° /20° | 0 mm | 7 | |
| 16 Sept. | Partly cloudy | 27° /20° | 12.7 mm | 6 | |
| 17 Sept. | Patchy rain possible | 26° /21° | 10.9 mm | 6 | |
| 18 Sept. | Sunny | 27° /20° | 1.3 mm | 6 | |
| 19 Sept. |  Overcast | 26° /20° | 1.3 mm | 6 | |
| 20 Sept. | Patchy rain possible | 27° /20° | 0.2 mm | 6 | |
| 21 Sept. | Sunny | 26° /20° | 0.2 mm | 7 | |
| 22 Sept. | Sunny | 26° /20° | 0 mm | 7 | |
| 23 Sept. | Sunny | 25° /18° | 8.2 mm | 6 | |
| 24 Sept. | Patchy rain possible | 25° /19° | 2.3 mm | 6 | |
| 25 Sept. | Sunny | 24° /18° | 18.5 mm | 5 | |
| 26 Sept. | Sunny | 25° /19° | 7.6 mm | 6 | |
| 27 Sept. | Sunny | 26° /20° | 1 mm | 6 | |
| 28 Sept. | Patchy rain possible | 25° /20° | 2.1 mm | 6 | |
| 29 Sept. | Sunny | 24° /19° | 8.7 mm | 6 | |
| 30 Sept. |  Moderate rain at times | 25° /18° | 8 mm | 6 | |
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Naples weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Sunny | Sunny | Sunny |
| Temperatures | 31°/24° | 27°/21° | 23°/17° |
| Rainfall | 25 mm | 123 mm | 84 mm |
| Wind | 16.5 km/h | 16.6 km/h | 13.3 km/h |
| Humidity | 55% | 58% | 63% |
| Rainy days | 9 days | 19 days | 19 days |
| Dry days | 22 days | 11 days | 12 days |
Planning a trip to Naples? Discover the best time to visit
Guide for Naples in September
In September, Naples, Italy experiences a transition from the warm summer weather to the cooler temperatures of autumn. At the beginning of the month, the weather in Naples is generally still quite warm, with average temperatures around 25° during the day and 17° at night.
The city continues to enjoy long, sunny days with minimal rainfall, making it an ideal time to explore the historic sites and beautiful coastline.
As the month progresses, the weather gradually begins to cool down. By the end of September, temperatures in Naples tend to decrease to around 22° during the day and 14° at night.
While the days remain pleasant for outdoor activities, the evenings become noticeably cooler, signaling the arrival of autumn.
Overall, September in Naples offers a delightful blend of summer and autumn weather, making it a great time to visit for those who enjoy milder temperatures and fewer crowds. Visitors can still enjoy the city's outdoor attractions and al fresco dining while experiencing the changing seasons.
Naples in September - FAQ
Naples water temperatures in September
The average water temperature of the Mediterranean Sea near Naples in September is 24.6 °C. At the beginning of September temperatures are around 24.6 °C; by the end of the month they stay fairly steady and reach 24.5 °C.
- What is the water temperature in Naples in September?
- The average water temperature in Naples in September is 24.6 °C.
- Can you swim in Naples in September?
- Ideal conditions for families and casual swimmers. You can stay in for long swims or reef explorations with no thermal protection required.
What to pack to Naples in September?
As you prepare for your trip to Naples in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Naples, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
September rainfall patterns in Naples
UV exposure in Naples during September
Quick links
Where is Naples?Get accurate weather forecasts for Naples, located at latitude 40.852 and longitude 14.268. Stay updated with localized weather information tailored for Naples.