I live in Arizona so my comments are more for out weather here. I'm sure others will reply from the East Coast. What I can tell you is that here in AZ, starting in middle May the time outside gets very short. Summer time is as follows; outside for potty break at 5:30 for 10-15 mins, inside...out mid morning for 5-10 mins, inside again...outside later afternoon (5:00) for 5-10, inside, eat, out again for 5-10, inside...out at 9:30-10pm >>>maybe 10 mins.
Inside A/C 99% of the time. No parks, no walks.
Non-summer schedule could be outside as much as 1-2 hours depending on the month in fall and winter. Here our winters are No-snow, nights down to mid 30-40 and day up to 50-60. They Love to lay out in the sun but can even over heat in that temp.
When they are out, never take you eyes off of them.