I found this to better explain. If the temperature in the morning is 71 degrees, and the dew point is 70 degrees, the relative humidity would be 97% (rounded off). As the day warms up the dew point would stay the same unless a new air mass arrived with either more humid air or drier air. Let’s assume that this does not happen. If the air warmed to 95 degrees and the dew point stayed at 71, the relative humidity would be 44% and the heat index would be 101 degrees.
Humidity and dew point are relative the higher the dew point the more humidity. The lower it is the more dry the air is.
I found this to better explain. If the temperature in the morning is 71 degrees, and the dew point is 70 degrees, the relative humidity would be 97% (rounded off). As the day warms up the dew point would stay the same unless a new air mass arrived with either more humid air or drier air. Let’s assume that this does not happen. If the air warmed to 95 degrees and the dew point stayed at 71, the relative humidity would be 44% and the heat index would be 101 degrees.
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