Most deffiently. Of course there were days were it was too cold (it was very cold and rainy during our 2002 trip). But on the days when it didn't rain it was deffiently warm enough to swim.
Then again my kids wanted to swim even when it was raining.
Well, you know the pools are heated dont ya???Sooooooooo,heckie yes ,we nutty michiganders have swam in Dec,and worn hats ,heavy sweatshirts and gloves to the parks at night-hehehee
Our last few trips were in December, and we almost always swim! It was 80 degrees one day and then it was below 50 the next morning at MK. Dumbo was a chilly ride that day! Definitely bring your swimsuits with you.