Good, 65 is fine. I wouldn't let it get below 60 for a baby, but adults are fine with nighttime drops down below that - as long as they can warm up in the morning, they're fine. In fact, nighttime drops are GOOD for them - it increases their life expectancy by slowing their metabolism down.
that's fine - though adults are significantly tougher to over heat, or freeze. Outdoors, I've seen my old male (a little guy) bask in full sunshine when the temps were 102 outside - not tolerate - BASK.