>A temperature around 40 is just about perfect for running. Chilly at first but very comfortable once you're moving.
40's up to about 55 or so is perfect for me.
>When I was first working after college I was based in Dallas through one of the worst heat waves they ever had. Daily highs were over 100 some outrageous number of days in a row. I ran right through it, 6-8 miles a day, and didn't even take water. Young and stupid!
