Weather in Italy is generally separated into three distinct regions; the alpine north, the northern plains, and the central and southern peninsula.
You can also access Italian weather on your personal travel itinerary.
Weather in Northern Italy (Italian Alps):
The Italian Alps (or alpine north) can experience similar weather patterns as in Switzerland or in western Austria, though snow typically falls harder here than in other mountainous areas. Sunshine can be stronger here as well, compared to other Alps regions in Europe.
During the summer, the alpine north can experience an occasional thunderstorm, though nine hours of sunshine can be fairly typical as well, especially in the popular tourist destinations of Como and Lake Maggiore.
Weather in Northern Italy (Plains):
The northern plains stretch from Turin in the West to Trieste in the East. This region also encompasses the popular travel destinations of Venice and Milan.
Weather here is less severe than in the alpine north, but it can still be cold during the winter months, similar to what you may experience in Paris or London.
Central and Southern Italy
Central and Southern parts of Italy experience the most sunshine. There is generally little climactic variation in temperature, humidity, and rainfall as you head south from Genoa, though temperatures will increase slightly.
In the furthest south, and in Sicily and Sardinia, you will experience the hottest and driest weather in Italy.