Weather through the year
Naples has hot summers and mild, wetter winters. August is the hottest month in the table, with an average daily high of 31.3 °C. November has the most rain in the table below, with 115.5 mm on average. Spring and early autumn sit between these extremes, so April, June and early autumn are comfortable choices for walking in the old town.
The underground sites are useful in any season. The Ipogeo opens Tuesday to Sunday from 10:00 to 15:00, and warm, comfortable clothes are recommended, so bring a jacket even in summer. Start with our Ipogeo dei Cristallini tickets if you want to fit a slot around the weather.
Monthly weather in Naples
Averages from the Napoli Capodichino station, 1991 to 2020. These are climate normals, not a forecast.
| Month | High | Low | Rain |
|---|---|---|---|
| January | 13.5 °C | 4.8 °C | 81.6 mm |
| February | 14.1 °C | 5.0 °C | 59.4 mm |
| March | 16.5 °C | 7.3 °C | 77.0 mm |
| April | 19.6 °C | 9.9 °C | 74.5 mm |
| May | – | – | 49.6 mm |
| June | 27.9 °C | 17.9 °C | 29.0 mm |
| July | – | – | – |
| August | 31.3 °C | 21.0 °C | 13.8 mm |
| September | 27.1 °C | 17.4 °C | 77.9 mm |
| October | 23.0 °C | 13.4 °C | 78.2 mm |
| November | 18.4 °C | 9.3 °C | 115.5 mm |
| December | 14.4 °C | 5.7 °C | 100.1 mm |
For most visitors, April, June and the weeks around September offer the best balance of warmth and comfort for walking. If you want the least rain, aim for June or August, and expect the heat. This is our suggestion based on the table.
Our pick: an hour underground
The Bourbon Tunnel is a one-hour plan for a hot or rainy day, when the sights above ground are less pleasant.
Hand-picked tours, booked through GetYourGuide. Prices are indicative starting prices in euros (as of October 2026). Tap a tour for live availability and the current price in your currency.
Underground tours for any weather
Guided visits to the Ipogeo, the catacombs and Naples Underground, with live prices and availability.
A plan for hot or wet days
Go below ground when the sun or rain is hard.
Ipogeo dei Cristallini
A guided visit of about 40 minutes or an audio guide visit of about 30 minutes. Wear warm clothes and a jacket.
Tickets and booking →Catacombs of San Gennaro and San Gaudioso
Hourly guided tours. The catacombs close on Wednesdays, and booking is required.
Catacombs of San Gennaro →Naples Underground and the Bourbon Tunnel
Cisterns and tunnels under the old town, a good fit for a hot afternoon.
Naples Underground →National Archaeological Museum
A full indoor day. The mosaics and the Gabinetto Segreto are closed from 21 September to 30 November 2026, so check the collections that are open for your date.
National Archaeological Museum →Being underground does not mean a fixed temperature. Dress in layers and follow the instructions at each site.
Festivals and events
Dates that return each year.
San Gennaro. The saint's feast days fall on the Saturday before the first Sunday of May, on 19 September and on 16 December. These are the traditional dates, so confirm the times and the procession route for the year before you plan around them. In 2026 the relic procession took place on 2 May, from the Duomo through Spaccanapoli to Santa Chiara.
Maggio dei Monumenti. The city's cultural month, with exhibitions, guided visits and special openings. Check the programme for the year you travel.
Crowds. Holidays, Easter, Christmas and weekends can be busier in the old town, for example around San Gregorio Armeno. Book your slots early for those dates, and read our historic centre guide for the streets involved.
Plan around the airport
One date to check.
The airport operator has announced a full closure of Naples airport in November 2026 for runway work. If you want to visit around that month, check flights with your airline and the operator. Our getting there page covers the metro, the Alibus and the other routes. For a stay, see where to stay in Naples.
Best time to visit Naples: frequently asked questions
What is the hottest month?
August, with an average daily high of 31.3 °C and a low of 21.0 °C in the table, based on 1991 to 2020 normals.
What is the wettest month?
November, with 115.5 mm of rain on average, followed by December with 100.1 mm.
When is the best time for sightseeing on foot?
April, June and the weeks around September offer a good balance of warmth and comfort. This is our suggestion based on the monthly values.
Can I visit the underground sites in summer?
Yes. They are a good plan for hot afternoons. Dress in layers, since it can feel cooler below ground.
When is the San Gennaro festival?
On the Saturday before the first Sunday of May, on 19 September and on 16 December. Check the programme for the current year.
Does the Ipogeo close on any day?
Regular visiting days are Tuesday to Sunday, 10:00 to 15:00. Do not plan a Monday visit.