Generally you can figure a 1/10 of a second per 10 degrees of air temp drop. That's what I use when braket racing to stay on the dial in as the temperature drops at night. In the fall a temp drop from 85 at 5pm to 55 at midnight will decrease my time about .3 secs. Another thing to consider is when you run at higher ambient temperatures is you're tires don't cool as well. If you set you tires at 28-30 psi and make two runs fairly close together you can check you're tire presseure and have 32-34. For a lot of front drive cars thats the difference in a good launch and bad launch.
SVT suspension, FS 4-1, magnaflow, UDP, MAC SRI, NX wet, flowed cylinder head, JMSChip Xcal2
2.14 - 60'
8.7201 @ 74.72- 8th