Heat Humidity Factor

Moisture - temperature and heat humidity factor

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Increased humidity makes the measured air to feel hotter. The combined effect of actual temperature and humidity is indicated bellow:

Dry Temperature
 		 Relative Humidity (%)
(oF) (oC) 0 10 20 30 40 50 60 70 80 90 100
70 21.1 64 65 66 67 68 69 70 70 71 71 72
75 23.9 69 70 72 73 74 75 76 77 78 79 80
80 26.7 73 75 77 78 79 81 82 85 86 88 91
85 29.4 78 80 82 84 86 88 90 93 97 102 108
90 32.2 83 85 87 90 93 96 100 106 113 122  
95 35 87 90 93 96 101 107 114 124 136    
100 37.8 91 95 99 104 110 120 132 144      
105 40.6 95 100 105 113 123 135 149        
110 43.3 99 105 112 123 137 150          
115 46.1 103 111 120 135 151            
120 48.9 107 116 130 148              

Heat and Humidity Index Danger Zones

  • 90 - 104 : Heat cramps or heat exhaustion possible
  • 105 - 130 : Heat cramps or heat exhaustion likely, heatstroke possible
  • 130 and more : Heat stroke highly likely

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Related Topics

  • Air Psychrometrics - The study of moist and humid air - air condition - psychrometric charts, Mollier diagrams, air temperature, absolute and relative humidity, moisture content and more .

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