What is the humidity without the bowl of water?

Excessive humidity in flower promotes mold, which will render the buds unsmokable. (potentially dangerous) The moisture get's trapped between the compacted leaves in the bud, doesn't evaporate, and causes the problems.

I grow in the desert and flower in an outdoor shed, where the outside humidity levels run about 15% during the summer and winter. The humidity in my growroom stays about 40% with normal watering, but this does not mean that you should overwater the ladies just to raise humidity. I personally worry more about high humidity much more than low humidity. If you keep the flowering plants properly hydrated, (properly watered) humidity shouldn't be an issue.