Hey Growmie,
In general, you should strive to keep temps under 80°F (26°C) throughout the flowering stage, and especially towards the crucial second half when buds are in the midst of development. The temperature in the flowering stage is too important to ignore. That’s because keeping temps low during the flowering stage will help your plants produce the most potent, dense, smelly, and trichome-covered buds as possible. Unfortunately, higher temperatures during the flowering stage can cause plant problems and slowed bud growth. It can also cause terpenes and potency to evaporate into the air. What that means is if your buds stay too hot during the flowering stage, the higher temperature may accidentally be burning away some of your terpenes and cannabinoids (reducing the final taste/smell/potency of your buds after harvest).
Hopefully, this was helpful and remember ..."Happy Growing" and "Free your mind one puff at a time".