I have been through hot parts of California and Arizona in July. When I returned from Monterey, back in 2014 I "got" to drive through real beauty spots of California like Boron, Bakersfield, and Needles. It was only 118 in Needles. I had been driving since Monterey. Many hours on the road so 100% full heat soak on the car.
Beauty spots like Lost Hills in the photo above were only in the high 90s but it got hotter as I got closer to Needles. It actually got cooler in Arizona as I closed in to Kingman. The scenery was wonderful from the Kingman area back to Flagstaff. Flagstaff was nice and cool, but I continued to Gallup, NM. It was still nice the next morning when I just cruised on down I-40. New Mexico and the Texas panhandle all the way to home was in the 90s.
I stayed nice and cool.
All of that trip was cool compared to Savanna, GA in August. One day the heat index was 135. Yea, 135! The humidity was insane, and the temp was high 90s. It was 100+ all the way from OKC to Savannah, and back home.
The AC does a great job of keeping me cool. Now I have the upgraded evaporator blower so more air. I will be sure the AC is at prime tune up for Florida.