Effect of Heat on Training/Running

Old Runner Guy wrote:The 20 or so degree drop has me running about 25 to 30 seconds faster per mile during a "moderate" 6 mile run (from 7:30 to 7:00).

Does this difference sound right to you?

So, is it I'm getting more "excited" to run in cooler weather (which is true) or does a drop in temp. actually make that much difference?

That sounds about right to me. The difference between running in comfy (sub-20C) and sweltering (humidex 30C+) can be 30-60s/mile for me.

I don't think it has anything to do with excitement. I think it's a purely physiological response to less stress. Personally, while I run better in moderate temperatures, I hate to be cold. I'll be the only one with a windbreaker in 18-20C temps, and the tights and a couple of sweaters come on in sub-12 to 15C.