What To Wear To Run

I found this great little tool on Runner’s World to tell me what to wear when running. Why do I need this? I’ve been running all summer in Taiwan at 30-35C (86-95F). Tomorrow morning, it’s going to be 10C (50F). I was curious to see if I should change my gear. Turns out that no, I don’t need to add any layers. I might just wear one extra layer on my chest.