What do percentages on weather forecast apps mean?
In: Technology
It could be the humidity index – how saturated the air is with evaporated water. The actual volume of water that is per a given volume of air changes a lot depending on the temperature of the air. Cold air cannot hold nearly as much water as warm air, which is why people’s lips get cracked in cold weather; they are losing moisture to the air. So it’s based on how much water the air can actually hold.
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