כיצד לחשב את Heat Index Calculator
learn.whatIsHeading
The heat index (feels-like temperature) combines air temperature and relative humidity to determine the apparent temperature. High humidity impairs the body's ability to cool itself through sweating, making hot conditions feel significantly hotter than the thermometer reads.
מדריך שלב אחר שלב
- 1Uses the Rothfusz regression equation (NWS, USA)
- 2Only applicable when temperature > 27°C (80°F) and humidity > 40%
- 3Below this threshold, the actual temperature is used directly
- 4HI = −42.379 + 2.04901523T + 10.14333127RH − 0.22475541TH − 0.00683783T² − 0.05481717RH² + ...
Worked Examples
קלט
35°C (95°F), 70% humidity
תוצאה
Feels like 51°C (124°F)
Extreme danger level
קלט
32°C (90°F), 50% humidity
תוצאה
Feels like 38°C (100°F)
Caution — heat cramps possible