Although the hydration need is regularly associated with summer and effort at high temperatures and less with winter and frost, it is equally important.
Do you know that dry skin feeling on face, on hands? Just like the sun that affects the skin evaporating water, the cold has a damaging effect on the skin superior tissues. Moreover, water counterbalances in the body the effect the dry air has due to inside heating.
Moreover the hot water used for washing also has a negative impact on the hands exposed to cold: the water high temperature reduces hand skin humidity and dries epidermis even more. It is recommended to use warm, not hot water to wash your hands and also to have not very hot showers that would not take more than 10 minutes.
Cold water is not an appropriate option because it contracts skin capillaries and warm water dilates them and if you go out into cold air suddenly, they could break.
Probably the most important issue related to the water in the cold season is that, just like the summer, it helps with body temperature adjustment: the better hydrated, the easier for the body to consume energy in order to maintain the optimum temperature. Proper hydration also means lubricated joints which, in case of minor accidents caused by frost or other winter conditions, can make the difference between slight and serious accidents.