Yea, call the park, find out what the deal is, and then make a decision. Last September I went to Cedar Point with Friday having 60% of rain but Saturday and Sunday having 0%, so I figured it was worth it. Got there, only ride I couldn't ride more than once for the day was TTD, but that was more cause of wind/weather. While it was raining, no lines for anything and I got to ride Millennium Force 27 times in 2 hours! I don't regret anything