I guess I am losing my mind.When I read the OP's post the first time I thought he asked what was a good reason for repairing shingles.,.,.GAWD!!!!!!!
I thought.,.,O.k.,I will play along.,maybe let someone else bite on that one.
So now that I have it right.,I prefer 65*-70*.Not to cool but not to warm for scuffing.
Oddly enough I am asked by my homeowners as they are signing the check or mostly before.," So.,what is your favorite seaon for roofing"?.,Regardless if it is 100* with an index of 108*,,,or 15* with a wind chill of 1* I say.,right now.That way they feel that I prefer that type of weather whatever it is.