This winter season is played the same way as regular dodgeball, pack loosely pack your snowballs, so when you get hit don’t sting. Only use snowballs instead of regular balls.
Make two teams, and then go to town throwing the balls at each other. When someone is hit, he is “out” and sits down. If someone catches an offending ball, the thrower is out. The game continues until all members of one team are eliminated.