this post was submitted on 28 Feb 2026
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Doesn't SoCal sometimes have negative humidity? 20% seems pretty high to say it works in the desert.
Humidity cant be below zero, it measure how much water is in the air.
I think technically what we call humidity is actually relative humidity, so it can go below zero. Ture humidity can't of course.
"relative humidity" is the percentage of water the air holds relative to how much it could hold, which varies by temperature. It can't go negative, though it can go over 100%.
It really comes down to what you mean by humidity. “Dew point” can be negative, but humidity cannot.
“Negative humidity” is like saying “this glass has so little water in it, it has negative water”.
Weather channel negative humidity... either way, it's a far cry from the 20% this thing seems to be designed for.
Yes. I drink it and I actually lose water.