heat index
noun
plural heat indexes or heat indices
: a value that indicates what the ambient temperature feels like to the human body and that is derived from a calculation using air temperature and relative humidity
The most likely chances for a heat advisory are Thursday and Friday, when the heat index could approach at least 100 degrees, according to National Weather Service meteorologists …—
Julie E. Greene
Julie E. GreeneThe heat index is defined as a function of temperature and relative humidity. The combination of the two results in an apparent temperature that gives an idea of what the hot and humid air feels like to the average person.—Neil MacFarquhar
Neil MacFarquharExamples of heat index in a Sentence
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How to stay safe during the Middle Tennessee heat wave
Nashville weather radar
7-day Weather forecast
Friday: Partly sunny, with a high near 93 and heat index values as high as 98.
—Diana Leyva, The Tennessean, 16 Aug. 2024
Related Articles Heat advisory in effect as heat index temps reach triple digits
Cramps?
—Cindy Krischer Goodman, Sun Sentinel, 19 July 2024
By the time the Americans’ chartered plane left the Abu Dhabi airport Thursday, the temperature was about 102 degrees with a heat index of 114 degrees — on the cooler side for the last week.
—Joe Vardon, The Athletic, 18 July 2024
Three Dade Correctional Institution prisoners, represented by the Florida Justice Institute, said in the class-action suit that the state facility’s heat index surpasses 100 degrees in the summer.
—Minnah Arshad, USA TODAY, 1 Nov. 2024
Heat risk: Because heat does not pose the same kind of damage to property, CoreLogic defines heat risk as consecutive days exceeding 95 degrees Fahrenheit or temperatures exceeding the 98th percentile of local temperatures, as well as the frequency of extreme heat index days.
—Mira Rojanasakul, New York Times, 30 Sep. 2024
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Diana Leyva, The Tennessean, 16 Aug. 2024
Related Articles Heat advisory in effect as heat index temps reach triple digits
Cramps?
—Cindy Krischer Goodman, Sun Sentinel, 19 July 2024
By the time the Americans’ chartered plane left the Abu Dhabi airport Thursday, the temperature was about 102 degrees with a heat index of 114 degrees — on the cooler side for the last week.
—Joe Vardon, The Athletic, 18 July 2024
Three Dade Correctional Institution prisoners, represented by the Florida Justice Institute, said in the class-action suit that the state facility’s heat index surpasses 100 degrees in the summer.
—Minnah Arshad, USA TODAY, 1 Nov. 2024
Heat risk: Because heat does not pose the same kind of damage to property, CoreLogic defines heat risk as consecutive days exceeding 95 degrees Fahrenheit or temperatures exceeding the 98th percentile of local temperatures, as well as the frequency of extreme heat index days.
—Mira Rojanasakul, New York Times, 30 Sep. 2024
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Cite this Entry
“Heat index.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20index. Accessed 28 Dec. 2024.
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