My question is what temperature is it just to hot to tour?
I live and commute in Houston and it will be 106 heat index and that is actually ok for about 35 mins even in stop and go traffic.
But all day? even if constantly moving? I am not sure. My gut tells me it would be fine as long as I drink plenty of water and sunscreen. Water because even though the wind makes me 'feel' less hot I am still sweating.