วิธีการคำนวณ Heat Index Calculator
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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.
คำแนะนำทีละขั้นตอน
- 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 + ...
ตัวอย่างที่มีคำตอบ
อินพุต
35°C (95°F), 70% humidity
ผลลัพธ์
Feels like 51°C (124°F)
Extreme danger level
อินพุต
32°C (90°F), 50% humidity
ผลลัพธ์
Feels like 38°C (100°F)
Caution — heat cramps possible