Originally Posted by
Dangerous Dave
Just asked my brother who's a doctor and he says runners can safely wear shorts down to 40 and cyclists to 45. Suspected it must be in that area. When hiking, the temperature feels 20F warmer than standing, and cycling is more vigorous still, so probably more like a 25-30 degree difference running across, so 45 would feel like 70-75.
Sorry to disappoint you guys but I've talked with a qualified doctor, and the little "60-65" joke's over. I'd thought this was meant to be a sensible forum.
Your brother was talking about runners who typically travel a long slower than cyclists. Factor wind chill into the equation and you might discover that 60F is closer to the right zone, not the 45 he indicated. Of course, I would subscribe to the "whatever works for you" theory... but in my case it's about 60F.