Its getting kind of late to be treating with formic acid treatments. Yes, both MAQS & Formic Pro state that you can use their product upto 85 degrees F. I would caution using it above 80 degrees F as formic acid can be extremely hard on brood and queens. If you still have mild weather in the mid 70's up to 80 degrees, you should probably be ok but once the temperatures get above 80, I would not use either on my bees. Both are very effective on varroa mites, especially reproductive varroa mites that live in the capped brood comb.