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humidity index

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humidity index [hyü′mid·əd·ē ‚in‚deks]
(climatology)
An index of the degree of water surplus over water need at any given station; it is calculated as humidity index = 100s/n,wheres(the water surplus) is the sum of the monthly differences between precipitation and potential evapotranspiration for those months when the normal precipitation exceeds the latter, and wheren(the water need) is the sum of monthly potential evapotranspiration for those months of surplus.


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Temperatures are falling, the sun is not as harsh, and the humidity index is down.
To test her observation, she checked the New York heat and humidity index for every day from January 1993 to February 1994 and compared it to the number of women who entered preterm labor.
 
 
 
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