I don't use tretinoin during hot/sunny weather although I wear SPF50 suncream.
Do many people keep using theirs in this hot weather? And gave you noticed if you skin becomes more photosensitive? I never know if it's a good or a bad idea but it seems safer to me.
And I can't tell if such a long break is advisable.
I use 0.05 strength and when going back to it (October time after all potential travel is out of the way) I pretend I am first time year and re-introduce it gradually.
I'm always very, very, very tempted to keep using it though. Maybe even once a week instead of 3 times/ week which is my normal application frequency. Advisable or not? What extra precautions could I possibly take? I can't stay out of the sun all the time and other than religious SPF50 I can't think what other precautions to take. Regular hat wearing wouldn't be practical.