Relative humidity is the ratio of the amount of water that is evaporated into the air and the maximum amount of water that could be evaporated into the air. There is a strong temperature dependency which is why it is not a particularly useful metric. For example, when it is 95 degrees outside it is unusual for the relative humidity to be over about 50% and this would be very uncomfortable weather. However, is is not unusual to see 70 degrees with 95% relative humidity and this is not uncomfortable at all.
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Originally Posted by graciegirl
Thank you. I wonder too. Also percent humidity. It can't be 80% WATER as the amount of Water in the air. We don't have gills. It does seem to make it harder to breathe when walking for exercise.
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