🇮🇹Italy · Climate
Italy — Climate
Italy climate by region and month: Alps, Po valley, centre, south, islands. Summer heat, winter cold, sirocco, humidity, allergies, sea. Q2 2026.
Italy is not one climate but five bands stacked from north to south. The January gap between alpine Bolzano and Sicilian Catania is 23 °C, and the sirocco turns Palermo into a Saharan postcard for three days at a time. This chapter shows the Italian year in numbers and helps a reader pick a region by latitude and altitude, not by holiday photos.
Italy as five climate bands
Moving north to south, Italy crosses five distinct bands. Alps and Dolomites at the top, the Po plain (Milan, Turin, Bologna) with a continental edge, central hills (Tuscany, Umbria, Lazio), southern coasts (Campania, Calabria, Apulia), and the islands (Sicily, Sardinia). Each band answers "is summer hot" and "is winter cold" differently.
The Alps produce alpine weather: snow December through March, cool summer +20 to +24. The Po plain runs continental: winter fog and lows to -5 at night, summer +30 to +34 with high humidity. Central hills are the postcard register: mild winter +5 to +12, warm summer +28 to +32, clean seasons. The south is Mediterranean: nearly snowless winter, dry summer +30 to +37, Sahara-side winds. The islands add another summer: swimming season runs from May to October.
The year in average numbers
A national average over twelve months. Bar height is the range between average daily high and average daily low; pips at the top are daily sunshine hours. This is the country median: subtract 2-3 °C in winter for Milan, add 3-5 °C in summer for Sicily.
Pips above — sunshine hours · tap a cell
September is the most comfortable month for a relocation: the heat has broken, public offices are back from August holiday, and rent has not yet jumped to the school-year level. February is the worst: grey, damp, with services moving slowly.
Summer: July, August, sirocco
Italian summer is not uniformly hot. The Alps stay cool. The north suffers muggy heat, not dry: the Po plain runs 70 % humidity at +32, which feels heavier than +35 in dry Palermo. The central hills are saved by night-time temperature drops. The south and islands hit record peaks but a sea breeze compensates.
- Bolzano28 °C
- Milan30 °C
- Rome31 °C
- Naples30 °C
- Bari31 °C
- Palermo30 °C
- Catania32 °C
Sirocco is its own weather, not a variant of the others. The southeasterly wind arrives from the Sahara with dust, lifts temperature 5-8 °C in 24 hours, and holds it for 2-4 days. The south sees {{fact.sirocco_days}} a year, most often in March, April, October. Cars turn red, allergies suffer, air-conditioners run flat out.
Ferragosto (15 August) is when the country actually stops. Small shops, restaurants and private clinics close; only chain supermarkets and on-duty pharmacies operate. If you plan to move or to submit paperwork, never in August.
Winter: where the minus lives
The "mild Italian winter" stereotype applies only to the south. Northern Italy in winter is harsher than Lyon or Zurich because of the Po inversion: cold air sits trapped in the plain for weeks. Sub-zero and snow in Milan are normal; heating runs October through April.
- Bolzano-3 °C
- Milan0 °C
- Venice1 °C
- Rome4 °C
- Naples5 °C
- Bari5 °C
- Palermo9 °C
- Catania8 °C
A flat with central heating () follows the building manager's schedule. You do not control the temperature; the residents' assembly and the regional law do (typically 15 October to 15 April, 14 hours a day in the north). A standalone gas boiler () gives control but you pay gas directly: €170-280/month in winter.
In the south the issue is damp, not freeze. Palermo holds +9 / +15, but many old flats lack central heating because "why would we"; rooms stay cold from stone walls and humidity. An electric heater plus a dehumidifier is standard Sicilian kit.
Rain, humidity, wind
Annual rainfall in Italy varies from 600 mm in the southeast (Apulia) to 1,800 mm in the pre-Alpine regions (Lombardy, Veneto). Rain is strongly seasonal: October-November and March-April are peaks; July-August are nearly dry country-wide except in the mountains.
The Adriatic coast is drier than the Tyrrhenian but windier. The Tuscan coast and Liguria are mild on temperature but humid on air: laundry takes a day to dry outdoors, clothes never feel fully aired in winter. Sicily and Sardinia are dry and comfortable in summer, damp in winter.
The Po plain suffers winter smog because of the inversion (warm air on top, cold below, no mixing). PM10 routinely exceeds the WHO threshold November through February, and Milan imposes driving restrictions several times a season. A material factor for asthmatics and allergy sufferers.
Allergies, pollen, air quality
The Italian allergy season is long and staggered. Cypress flowers January through March (the major southern allergen, underestimated by tourists). Olive produces a strong wave in April-May across the south and islands. Grasses (parietaria, gramineae) cover May-June nationwide. Ragweed has recently established in Lombardy and runs August-September.
Air quality: Milan and Turin spend December-February in the red AQI band on PM10. The south and islands sit reliably green except during sirocco. AQI forecasts are published by each region's ARPA agency (for example arpalombardia.it). IQAir AirVisual is the useful consumer app with alerts.
Sea and mountains, year-round
Sea. The swimming season splits by region. Sicily and Sardinia: late May through end of October; August water reaches 26°C. Tuscany, Liguria, Campania: June through September. The Adriatic is warmer than expected in July-August because of the shallow shelf. Winter swimmers are mostly Sicilian and Norwegian.
Mountains. Alps and Dolomites have a ski season from December through April; Cortina holds reliable snow for 4 mo. The Apennines (Gran Sasso, Abruzzo) are unreliable, depending on the year; low-snow years close trails by February. Sardinia and Sicily have mountain resorts (Etna) but the snow is more a tourist novelty.
A uniquely Italian combination: two hours from Milan you can be skiing or on the Ligurian beach. Bologna offers the same with longer drives. The "one flight, two seasons" geography is rare in Europe and surprisingly useful for families with mixed-age children.
How to pick a climate
If you pick Italy on climate, the only two honest variables are latitude and altitude. Not "warm" or "cold", not "Mediterranean" or "continental".
- Pick latitude by tolerable winter: +0 / +5 (Milan, Venice), +5 / +9 (Rome, Naples), +9 / +12 (Sicily, Calabria).
- Pick altitude by tolerable summer: 0-200 m (standard Italy), 200-600 m (Perugia, Siena cooler by 3 °C), 600+ m (Cortina, Brunico alpine summer).
- Check the local wind rose. Adriatic is windy and dry, Tyrrhenian humid, Sicily takes sirocco in summer.
- Run a seasonal test: spend a week in February in the candidate city. Everyone likes Italian summer; winter is the real exam.
Constrained budget plus mild winter: Lecce or Calabria. Work-and-culture density and accepting of a grey February: Bologna or Turin. Ideal climate and willing to accept a small city: Perugia or Lucca. The "northern country with snow" register: the Dolomites, but that is mountain living, not Italian living.
Frequently asked
Which Italian region has the mildest winter?
Sicily and southern Calabria: January low holds +8 / +9 °C, snow almost never falls. The next tier is the Liguria coast (San Remo, Alassio) and Campania coast (Sorrento, Capri): +6 / +8. But many local older flats lack central heating, so indoor temperatures feel colder than outdoor.
Where in Italy is summer not too hot?
Alps and foothills: Bolzano, Trento, Aosta valley, Cortina. July daily high to +28 °C, nights drop to +14. Liguria thanks to the sea breeze sits at +27 / +29 even during the August peak. Central hills above 400 m (Perugia, Chiusi) run 2-3 °C cooler than the plains.
What is sirocco and when does it hit?
A southeasterly wind from the Sahara that brings dust, raises temperature 5-8 °C in 24 hours and holds it for 2-4 days. The south sees {{fact.sirocco_days}} a year, most often in March, April, October. Cars turn red with dust, allergies suffer, AC runs flat out.
When can you actually swim?
Sicily and Sardinia: late May through end of October; water in August up to 26°C. Tuscany and Liguria: June through September, water up to +24. The Adriatic is warmer than expected in July-August because of the shallow shelf: up to +25 in Rimini. Winter swimming is for the trained.
What should allergy sufferers know?
Pollen seasons are well-separated: cypress January-March (the major southern allergen), olive April-May in the south, grasses May-June countrywide, ragweed August-September in Lombardy. PM10 in Milan spikes November-February because of the Po inversion. AQI forecasts published per region by ARPA.
Where is reliable snow?
Dolomites and Alps above 1,500 m: December through March. Cortina holds reliable snow for 4 mo; Presolana and Cortina-d'Ampezzo ski trails run that whole time. Apennines (Gran Sasso, Abruzzo) are unreliable: low-snow years close trails by February.
Verified · 2026-04-01