Definitly, that heat is killer, You are absolutely going to need to cool that room some way, either ALOT of fans, or if you can afford it a AC.
But keep in mind that with Humidity of 70+ YOU WILL be forced to purchase a Dehumidifier or sorts. You dont need a $200 one, but I am sure you will be able to find one for $60 or under if you shop around, even walmart or target carries cheap ones...
You need to get humidity down to like 40 or lower if possible, otherwise you may get bud rot.....