Humidity too high?!?

Humidity is dependent on air temperature. If you put the hygrometer next to the heat lamp, the air temperature is much higher so the humidity reading will be lower.

Humidity is the ratio between the water vapor in air vs the maximum water vapor the air can hold before the water condenses. The higher the air temp, the more vapor the air can hold, thus a lower humidity.

Not sure if this helps, but the humidity down where your snake is what's important, not near the lamp.


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Is the substrate wet ? or is it absorbing the condensation on the bottom of the tub ? I would imagine that if you do have condensation then your probably at least above 65 % humidity. Im only guessing though I have no evidence that is the case. But I would think opening the enclosure and either swapping some of the substrate out with some dry if possible substrate would bring it down. Or it is a faulty hygrometer. Im very new to this forum and being a bp owner so this is all just in my opinion. But either way sleeping over night I would think is going to be fine till you can get you another meter tomorrow or a different substrate. I doubt mold is going to take over in a matter of 8 to 10 hours if the reading is actually correct. Do you have another tub comparable size that you can either lay some paper towels on and put a water bowl in it and let it sit in the same conditions as the tub its in and see if the meter shows a different reading ? These again are all just suggestions popping into my head as I type :D I hope they help in some capacity

digital hygrometer? or one of them dial types?


get you a digital one

Sorry to leave you hanging yesterday, OP, I had to leave quickly! Just to add to what was said already, the humidity will drop closer to the lights and further from the substrate, but all that really matters is the humidity around ground level where you little guy is at. Your hygrometer should be digital (even those can be funky) and placed at substrate level. Personally, I've got a digital one at substrate level on the hot side and an analog one on the cold side a little higher.

I would also say, maybe just feel with your hand or a paper towel to see if the substrate is dry, moist, or straight up wet and use your judgement as to the "correct" humidity.

Most importantly, don't freak out! Humidity is important, but temperature is more important. If your temps are fine, a day or so with higher humidity isn't going to produce mold or scale rot.

I'd try a new hygrometer. I had 2 faulty digital signage that kept reading 99. I got a different brand and now it reads normal.

As long as the enclosure itself is dry, you should have nothing to worry about.