How does humidity effect temperature?
We must differentiate between absolute and relative humidity. Absolute humidity is the volume of water per volume of air. For example, at 15 C, which is the average temperature on earth, a cubic meter of air cannot contain more than 13 grams of water. When it happens, the air is saturated and the relative humidity is 100 percent. The lesser the temperature, the lesser the absolute humidity. At 0 C (freezing point) the same cubic meter of air can’t contain more than 5 grams of water. The absolute humidity is then 5 gr/m3 but the relative humidity is still 100 percent because the parcel of air is at saturation point, a.k.a. the dew point temperature. When we feel the humidity, we feel the relative one because how high it is, is how much e.g. we can cool down by sweating. As you understand, if the air is 100 percent saturated, evaporation can’t occur and that’s why we don’t feel the cooling effect of the evaporation of our sweat when e.g. in the fog. The drier and the warmer the air is, t
