Sultry

Other than bringing mildew/mold in mid to late flower is high Humidity ( 70%-80%) a threat to the plants.

During summer I don't drop under 70% and no problems... Air flow my friend

But answering your question no, weed plants love high humidity

80% is too high, leaf boundry layer and stoma conductance!

Thank you good sir. May all of your tufts be thick and knotted.