Don't second guess asking questions lol - you can never go wrong - it just means you care.

What are you using as substrate - depending on the medium it can play a role in retaining that humidity. I'd say fire up a dehumidifier if you had one (if you were really that worried about it) but I know the one we have kicks off a TON of heat when it's on to the point I wouldn't consider using it in warm weather (no central AC).

I've had a few enclosures I have had to melt extra holes in to get the humidity and temps tweaked - then closed them off when the seasons shifted. I would heed Adam's advice though - if it is just a few days and related to local weather conditions and topping out in the 70's I wouldn't sweat it too much.