The 2026-2027 heating switch-on calendar continues: from 15 November the radiators will also start in climate zone C, which includes cities such as Naples, Bari, Cagliari and Catanzaro. Usable until March 31, 2027, for a maximum of 10 hours a day and internal temperature within 20 °C (+2 tolerance), except for exceptions by the Municipalities.
From Sunday November 15, 2026 they can be turned on heating also in the Municipalities of climate zone Cthe last populous area to become active after the E zone (Northern Italy, from 15 October) and zone D (Central Italy, from 1 November).
There zone C includes, among others, cities such as Naples, Bari, Catanzaro and Cagliari: the radiators can remain on from November 15th al March 31, 2027for a maximum of 10 hours a daywith an internal temperature that must not exceed 20°C (with +2 °C tolerance).
After climate zone C, the radiators will remain to be activated only in the two milder zones, A and B, which include some coastal and island locations in Sicily and Calabria.
In Italy, in fact, i heaters do not turn on in fact in a way uniform throughout the Village: the Peninsula is divided into six climate zones calculated on the basis of average seasonal temperatures, as required by Presidential Decree no. 412 of 1993.
Which cities fall into climate zone C
Climate zone C mainly groups together i coastal capitals of the Centre-South and the islands. Based on the classification, from November 15, 2026 there they return:
- Campania: Naples, Benevento, Caserta, Salerno;
- Puglia: Bari, Brindisi, Lecce, Taranto;
- Calabria: Catanzaro, Cosenza;
- Lazio: Latin;
- Liguria: Imperia;
- Sicily: Ragusa;
- Sardinia: Cagliari, Oristano, Sassari.
As mentioned, this classification does not follow geography, but the average temperature: for this reason Naples and a large part of Campania fall into zone C, while the nearby capital Avellino, colder, is in zone D and has already been able to turn on the radiators since last November 1st.
Heating activation 2026-2027: operating times and maximum temperature
In zone C heaters can work for a maximum of 10 hours per day until March 31, 2027maintaining an internal temperature of 20°C (with 2 °C tolerance).
It’s about maximum limits: with a reasoned ordinance, the mayors of individual municipalities can still adopt criteria more restrictiveanticipating ignition, reducing the daily hours of operation and even lowering the maximum temperature allowed in the rooms.
In Lombardy, for example, the maximum temperature limit inside buildings is 19 °C (+2 °C tolerance), while in Rome the Municipality has reduced the daily hours to 11, also lowering the temperature limit by 1 °C in this case.
They remain anyway excluded from the limits buildings with particular uses, such as hospitals, nursing homes and schools.
The last two switch-on zones, A and B respectively, will be able to turn on the heating from next December 1st. From the zone A only the Municipalities of Lampedusa and Linosa And Porto Empedocle; in the zone B provinces such as Agrigento, Catania, Crotone, Messina, Palermo, Reggio Calabria, Syracuse And Trapani.
Below is a summary table of the various climate zones:
| Climate zone | Ignition period | Operating hours | Maximum permitted temperature |
|---|---|---|---|
| Zone A (Municipalities with a warmer climate) | From December 1st to March 15th | Max 6 hours per day | 20 °C (+2 °C tolerance) |
| Zone B (much of Sicily and coastal Calabria) | From December 1st to March 31st | Max 8 hours per day | 20 °C (+2 °C tolerance) |
| Zone C (Naples, Bari, Lecce, Cagliari…) | From November 15th to March 31st | Max 10 hours per day | 20 °C (+2 °C tolerance) |
| Zone D (much of Central Italy) | From November 1st to April 15th (Rome from November 15th) | Max 12 hours per day (11 in Rome) | 20 °C (+2 °C); exception 19 °C in Rome |
| Zone E (much of the North) | From October 15th to April 15th | Max 14 hours per day | 20 °C (+2 °C); exception Lombardy 19 °C |
| Zone F (Colder climate municipalities) | All year round | No limitations | 20 °C (+2 °C tolerance) |
