I was in Oklahoma this past summer and the state was ranked with the hottest temperatures, of any state, ever...Many days soared beyond 100f and it was very dry...I just went to FL this weekend; woke up, walked outside and my sunglasses fogged; that's how humid it was considering it was only 80f...I have repeatedly said it's a different car at 40f vs 80f...I can say while both scenarios, OK or FL are bad acceleration wise, humid in fl was worse in the performance department...

 

Is your question regarding performance or maintenance in those two types of climates?

NBCat

 

Performance...

 

I would have have thought although both are bad that OK would be worse with not only the heat but also the altitude difference, would have thought the alt difference would more then make up for the humidity even with the temps being equal.

 

Since the air in Florida is more humid and most of the area is at sea-level, you should have slightly better performance under the conditions there than in Oklahoma. Of course, salty, humid air may not be the best environment for the body and paintwork if you're located near either coast.

NBCat

 

Here you go- simply input the variables and you'll see the effects of humidity and temperature.

Engine Tuning Calculator - using relative humidity