Temperatures everywhere are forecast to drop sharply over the weekend, according to Meteo.it, and could fall by as much as 14 degrees Celsius in the north-east, where parts of the mountains are expected to see snowfall.

Thunderstorms were reported on Thursday into Friday in Sicily, Calabria, and Puglia.
Snowfall started over the western and northwestern Alp at about 2500 meters, dropping to below 2000 meters by Wednesday morning.
It will be spreading across much of the northern and central Alps. The snow limit will be as low as 1400-1600 m across northwestern and northern Alps, about 1800-2000 m over the central Alps. Southeastern Alps, as far southeast as the Julian Alps will also receive snow, above 2200m. In the case of intense snow showers, the snow limit will drop lower.
Although the snow in September, in the heart of Autumn, may seem strange, we specify that for the Alps it is absolutely normal to see days of this type, where the sudden drops in temperature allow the snow to return.