The UN in WV was during an unseasonably hot September. It was 10 to 20 degrees hotter than usual. That can happen most places in the US.
And riding crosscountry during July and/or August is almost always hot most places. Aside from holding the UNs in May/June or Sept/Oct, I don't see how to avoid that. Then one has to worry about snow at altitude!
What's a ride planner to do?
11 R1200GSA (aka Big Bird)
04 R1150RT (Sold)
"The fool, with all his other faults, has this also, he is always getting ready to live." Seneca