You searched for: “comfort indexes”
comfort index (s) (noun), comfort indexes (pl)
An estimate of how tolerable conditions are for humans in hot climates: The comfort index is calculated as the temperature in degrees Fahrenheit plus a quarter of the relative humidity, expressed as a percentage.

If the sum is less than 95, conditions are tolerable for those unacclimated to the tropics.

This entry is located in the following unit: Measurements and Mathematics Terms (page 4)