You're at the upper end but as long as you keep an eye on there water supply they will probably be ok. Done around 80 is perfect.
If these are sativa dominants they may not do real well in a closet, they may need more room. If you used co2 86-88 would be real good.
killerweed420 Reviewed by killerweed420 on . 86-88 Degrees too Hot? Is 86-88 Degrees too hot for 10-12 Sativa clones? With the light off it gets down to 75-77 Degrees in my 3 x 3 1/2 closet. Rating: 5