Amy-
I little hint, if you don't make it out first thing in the morning, and you have the day off, wait until around 5:30. Down here the sun is still setting around 7:45, so I can go out and get a good 2 hours in, and it starts to cool off around 6:30. Or if you want a shorter ride, go out later. As long as you are home by dusk(not safe to ride on the roads after that,imho) you should be good:-)

I never ride mid day, but I do ride early evening a lot because of my work/school schedule.