My friends with Stangs up here have to have 2 different tunes when they run at the strip. It can get down to 20-30 degrees in September/October when its still open, and up to the mid 90's with very high humidity in the summer.
Its a blast to drive in cold weather though, less detonation and the car just screams. I took my car out at midnight last week when it was 7 degrees, I couldn't believe how fast it was, and it sounded like it had a fat cam in it. I wish drag strips had snow plows so I could figure out how much temperature effects my ET.