malmo wrote:
[quote]altoroad wrote:
75/humid in the early morning or evening is easier on you than 75/dry with the Sun beating down on you mid afternoon.
Nine years running through the Mississippi summer (May through September) forces me to disagree.
Summer running, here, is about three things: heat, humidity, and radiant sun. When all three nail you, you're toast. If you start a three-hour run too late, so that you're still running at 9:30 AM, when it's 83, muggy, and the sun it on you, you're toast. I've done that. Not good.
It's almost never 75 and dry here in the middle of a summer afternoon, but I've certainly ended long runs in early April or late May when it was 75 and very dry, and even with the sun, I'd take them any day. Yes, some suns are hotter than others. But there's something about very high humidity, mixed with any sort of warmth--and I'd say that 75 is the break point where warmth, mixed with humidity, starts to make a significant difference to an acclimated runner--that whaps you in a way that no amount of dry/sunny/75 weather does.
Maybe it's just me. That's all any of us can really speak for.