The temps have cooled off radically in Indianapolis. 75F - 77F is predicted for Monday through Wednesday. Unfortunately, I've been tied up with home improvements lately and haven't been able to ride much.
Because of asthma, I have more trouble riding in cooler temps than I do in the heat. I've ridden in 93F temps this summer, but I won't ride when it's 60F or under as I'll start wheezing.