I'm thinking you should be OK, but I'm not sure about dropping below 60 degrees. Only those of you in cold climates usually have this problem. Most of us have trouble keeping it cool enough. Is this your first time dealing with these temps.? If so I'd keep an eye on them and look for symptoms of stress.

I know those temps won't be a problem outside. Hopefully, they'll do OK. The last info I can recall stated something like 65 to 85 is their favorite range.