Ideally for me 25c 55/60% in veg and early flower up to wk4/5 then I'll start to lower it 50/55% then in the last 2/3 weeks I'll keep as low as possible 47/52%
I've read over and over that 40ish% RH is better for late flower - after 8 weeks if you count from flip. I'm going to try for that with my current run.
Currently day 19 in flower.
25C and 50% lights on
18C and 65% lights off
Veg tent has 2xclones and 2x seedlings
Lights on 23-25C and 45-50%rh
Lights off, tent stays open so 20C and 45%rh
Honestly though, you need to dial it in to your setup, as its most likely completely different than mine.