Lately its been around 70 but I would say in the few weeks we'll be running in the 80's and then end of may to june 90 to 100 plus. So would the p3 work better in the 70 degree weather and then the p4 when it gets hotter out side? BTW I finally got the 2.0 in the dirt today with about 7 tanks on the grp and coming from a mach 427....whooo what a difference! I'm gonna have to learn a new driving style cause with the mach I was able to run it wide open on a lot of the track. love the GRP