Humidity and Heat Index

Temperature and humidity factor

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

Heat Index
Dry Temperature
 
Relative Humidity (%)
(oF)(oC)0102030405060708090100
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

heat and humidity index danger zones

Related Topics

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

Related Documents

Tag Search

Need some Expert Advice?

JustAnswer can help you! Talk with a verified expert until your satisfied, 100% money- back guarantee.

Search the Engineering ToolBox

- "Search is the most efficient way to navigate the Engineering ToolBox!"

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!
About the Engineering ToolBox!

close