Taking care of a car in an area with freezing temperatures with ice and snow is different than washing a car where the weather isn't as harsh during the winter.
When the temperatures stay above freezing, even if there is snow on the ground, your car doors shouldn't freeze shut, whether you take it to a car wash, use a high pressure wand or wash it by hand.
When the weather is below freezing, hand-wash your car with cold, soapy water and then rinse with cold water. Wear thick rubber gloves over regular gloves to protect your hands from the cold. Wash the doors and windows last and immediately wipe the door jambs and all weather sealing with an absorbent cloth. Take special care to wipe water from the locks on the doors.
Sunny days are often considered better than overcast days and better than night time to wash your car in winter. The sun will help warm any water that may get into crevices you can't reach where it can freeze when the temperature begins to drop. Even when it is sunny, be sure to wipe away all water you can see with an absorbent cloth.
