How often you should wash your hair in a cold climate depends on your hair's natural greasiness and how comfortable you are with it. You should wash it whenever you feel like it is too greasy.
Freezing cold climate for example the snowy hair has long and fluffy hair to stay warm in the cold brutal winters
You can (and should) bathe and wash your hair when you have a cold. Just make sure you dry your hair completely before going out in cold weather.
Hollow hair and fat
Yes they have sharp claws to climb trees with and thick fur to withstand the cold climate
In order to have shiny hair you should use condintioner or when showering turn the water to cold.
You should wash your hair every other day or less if the hair is thinning.
the cold air is making the water in your hair cold which makes your hair cold. if your hair is dry then there is no water in i for the hair to be as cold as it is when its wet.
Twice a month :)
Everyday.
If you mean cut the hair very short, then sure. Its really your choice, but if it is cold or chilly out you should put a sweater or coat on him/her.
You should wash your hair every week if you have thick hair and you don't always put oils in your hair. UNLESS you have thin hair. You should wash your hair hair every other day!
You should rinse your shampoo and conditioner out with warm to hot water to kill the germs left over...but afterwards (after you rinse out your conditioner) rinse with cold to seal the cuticles and make your hair nice and healthy! :)