For the early stage you want ~28°C and 70-80% RH.
Once the plants look healthy and firm you want 26°C and 50% RH.
You want to get to around 22°C and 20% RH by the end of flowering, changing it gradually since flipping the lights to 12\12.
If you don't have an AC and dehumidifier the OK zone is 19-32°C, >85% RH for veg and >60% RH for flowering.
You should aim for ~5°C drop at lights off.