I don't mind getting wet. Some of my most memorable 10K and marathon training runs are in the rain and show. I just have this stellar no accident record going. My plan for this year is 3000 miles. All of them on top of the bike.
I am riding 32. Probably will not ride if it does rain (but I will check in to get my yet another t-shirt and water bottle). I rode in the rain at this ride last year. It was miserably cold and it took a while to warm back up after it was over.