In Europe the rule of thumb for snow at Christmas is: That the higher up the mountains you are in the Alps or the further North you are in Scandinavia the more certain you can be of a guaranteed white Christmas.
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Fans of winter sports, take note: Estonia's capital Tallinn is the snowiest city in Europe with an average of 20.5 days of snow per month.
Snow starts to fall in earnest in Switzerland in December, and with it are the tourists that flock to the mountain ski resorts. There are also charming markets held in various cities in the lead-up to Christmas. Whether you're interested in outdoor or city attractions, December's a great time to visit Switzerland.
The festive season in Paris is very warm and romantic with colourful lights draped on buildings and a few light snow showers over the month. Paris weather in December is very cold and wet with a small chance of snow.
Temperatures in the north range from 25 – 45 degrees Fahrenheit (though the mountains have their own microclimate) while the south easily enjoys an average of 50 degrees and in Sicily it may get as high as 60 degrees Fahrenheit in December.
The weather is pleasant during Portugal's winter.Despite it technically being winter in Portugal, the winter months stay pretty mild. The temperatures average between 10°C (50°F) and 17°C (62°F), the air is dry, there's plenty of sun, and little rain.