1st Time Grow - Homemade Micro Tent

This week we've started to experience really high humidity. I have a relatively simple set up but my RH has remained between 50-60% on average up until now. We've had pretty heavy rain in socal lately and my RH has been getting as high as 94% which is really scaring the hell out of me. I don't have the money for an airscrubber or a dehumidifier but fortunately i lucked out and a buddy of mine is going to give me one of his old inline fans. Hopefully exhausting some of the air in the tent will do the trick. I sure hope it does because i would hate to ruin the plant in the most important part of the grow. We're about 8 weeks in and 2 weeks in to flower at this point. Go easy on me because this is a first time grow.