Heat index

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

The heat index (HI) is a measure of temperature as perceived by humans, combining actual air temperature and relative humidity, in shaded areas; it takes into account that elevated humidity makes hot ambient temperature feel higher than the same temperature with lower humidity, as evaporative cooling of sweat is less effective.

Excerpt from the Wikipedia article “Heat index”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Conant, CC BY-SA 3.0, via Wikimedia Commons.