My ideal day is cloudy low 60's F with a cool breaze. But that being said I prefer the cold over heat, so if it's not going to be my ideal day then I'd wish it to be in the 40's or so. I can't stand the heat. If I do anything remotely physical then I will be sweating instantly. Being a roofer as well I don't like being in the sun all day, or the heat for that matter.