yeh be ok, if you think in nature the fluctuations in temprarures during daytime , goes up & down all the time. but saying that if your growing indoors & imitating outdoors its best to try & keep the temps & conditions(air intake,outtake,etc...) as stable as possible for the best results. not saying yours will be effected but indoors we're speeding up the process so stability is one of the key factors to a good healthy growth. happy growing