Honda's specified compression pressure is 71 psi at 600 rpm. They do not specify a maximum and minimum for that particular engine (they do for some others) but 65 psi is close enough - it's only 8% below nominal, and within Honda's usual specification limits. For example, for the GXV120 the range is 71 plus or minus 28.4 psi. I do not think you have anything to worry about, but as always when you have worked on an engine, it is prudent to watch for anything out of the ordinary for the first couple of hours' running.
I had guessed it would be fairly cool there in Virginia. Here in Melbourne we've just had 4 successive days over 107 degrees F - a local record. Maybe we should both move to Hawaii.
