For ambient temperature, I'd say anything over 86F is too hot and below 76 is too cold. These aren't absolutes, but that's what I'd be comfortable with my BPs.
Sent from my SAMSUNG-SM-G920A using Tapatalk
0.1 Reg. BP Het. Albino (Faye),
1.0 Albino BP (Henry),
0.1 Pastave BP Het. Pied (Kira)
1.0 Pied BP (Sam)
1.0 Bumble Bee BP (Izzy)