The final week of the year will bring contrasting weather conditions across Italy. Initially, it looks like the weather will be quite mild, with mostly sunny weather across much of the peninsula. However, this period of good weather won't last long: starting mid-week and before the arrival of 2026, a large mass of very cold air from the Arctic regions will affect the country, causing a rapid and sharp drop in temperatures.
In the first few days, today Monday 29th and tomorrow Tuesday 30th December, clear weather is likely almost everywhere, except for a few instability in the southernmost regions such as Calabria and Sicily. But already during the night between Tuesday, December 30th and Wednesday, December 31st, clouds will rapidly advance from east to west, reaching the Po Valley and part of the Apennines, thus ushering in the most wintry phase of the week.
New Year's Eve with very cold weather
The peak of the change is expected between Wednesday, December 31st and Thursday, January 1st, when the cold irruption will cause a sudden drop in temperatures, with widespread frost especially in the North and inland areas of Central Italy. In many mountainous and hilly areas, snowflakes are possible down to relatively low altitudes, around 600 meters in the central Apennines.
In the days immediately following New Year's Eve, the weather will remain quite variable: in the North and Central Italy, days will be characterized by gray skies, fog in the plains, and severe frosts at night. In the South and on the islands, scattered showers and patchy cloud cover are likely, with snow still possible in the Apennine regions. In short, for those celebrating the arrival of the new year outdoors or planning trips, the advice is to prepare for significantly colder and more typically wintery weather compared to the first few days of the week, with conditions that could quickly change from sunny and mild to frigid temperatures and snow.
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