I'm in a ski town in Colorado so you get the full mix here, but yeah by March it's t-shirt weather for the locals, tourists still show up dressed for an arctic expedition but whatever. Hell, isn't even the funniest thing that comes up, the resort does a costume week every spring so I did formal day in a dress shirt and tie on a fixie, which is a pretty physically intensive job. Favorite remark was a regular in the back of the line yelling "[name expunged] are you fucking bumping chairs in a tie?"