Howdy. That may be a little low, even for early flower. In the final weeks of flowering, RH can be dropped quite low, but maintaining a decent RH in early/mid Bloom is helpful. If you're able too, try and raise it to 40-55% until the final 1-2 weeks of flower. A wet towel hanging from a hanger, placed anywhere in the tent, should give you the bit of moisture you're looking for. Free and easy👍.
I'd wait for another answer as confirmation, this is just my two cents! Good luck and happy trails👌