Nah. When it gets closer to pre flower you can start to drop it and even then keep it close to 50 and you'll have good growth, try stay away from above 60% during flowering as moisture in the air tricks the plant into thinking it doesn't need to feed and defs start to show and you won't have a clue as to why.
45-60max try stay at 55 to stay in the safe zone cause when the lights go out in a tent the RH normally goes up a few %.
Good luck.