In December and January, which are generally the coldest months in Florence, you have the opportunity to practice some typical Winter sports while still remaining in the city (the mountains are not that close, unfortunately)!
At the Parterre area (near Piazza della Libertà) in December you’ll find an ice rink where you can also rent ice skates.
The Obihall (in eastern Florence), hosts the Tuscany Winter Park with skating on ice, snow tubing and a downhill ski. All necessary equipment can be rented on site.
In 2016-2017 the Park is open from October 26 to February 26t.