If summer's your game, maybe you should dig up that cut-off Bon Jovi T-shirt and pair it with those cargo shorts that seem to have too many pockets and some canvas sneakers. If you're pulling for winter (what's wrong with you?), then maybe you should just wear what you were already wearing, only with more scarves and some touchscreen-friendly gloves.
River City will be tapping two kegs of Midnight Marmot Imperial Stout (one poured through the Randall) and one keg of Oako-Coco Nitro for the festivities, in addition to $3 pints and $10 growlers all day. They also have kegs on sale ($39 for a 1/5 barrel...crazy). The festivities kick off at 3 pm and wrap up around 9 pm.
For general Punxsutawney-based inspiration, we of course recommend a bit of Bill Murray circa the 1993 ultra classic Groundhog Day.