Yes, those temps are very bad for cannabis. Cannabis plants virtually stop growing at around 85 F. The ideal temperature for cannabis is anywhere from 74-80 degrees with 74 being optimal. If you can, add some sort of AC unit to your grow show. The attic is usally one of the hottest places in the house. If you have a basement then I would suggest shifting your grow show to the basement. Since you only have a small number of plants then you could possibly move it to a closet or unused bedroom.

Happy Toking :rasta:
kush07 Reviewed by kush07 on . Temperature Q ASAP i have 2 plants in my attic and when it get around 80 ouside it is probably 95 to 100 in the attic. Will that kill my mj even if a fan is blowing softly on the plants? Rating: 5