Heat-Humidity Index

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Temperature Relative Humidity (%)
°C °F 100 90 80 70 60 50 40 30 20 10 5
15 59 17.5 17.0 16.5 16.0 15.5 15 14.5 14 13.5 12.9 12.7
18 64 20.2 19.6 19.0 18.4 17.8 17.2 16.6 16.0 15.4 14.8 14.5
20 68 22.2 21.5 20.8 20.1 19.4 18.7 18.0 17.4 16.7 16.0 15.6
22 72 24.2 23.4 22.6 21.9 21.1 20.3 19.5 18.7 18.0 17.2 16.8
25 77 27.5 26.5 25.6 24.7 23.7 22.8 21.9 20.9 20.0 19.1 18.6
28 82 31.0 29.9 28.7 27.6 26.5 25.4 24.3 23.2 22.0 20.9 20.4
30 86 33.5 32.2 31.0 29.7 28.5 27.2 26.0 24.7 23.5 22.2 21.6
32 90 36.1 34.7 33.3 31.9 30.5 29.1 27.7 26.3 24.9 23.5 22.8
35 95 40.4 38.7 37.1 35.4 33.7 32.1 30.4 28.8 27.1 25.4 24.8
38 100 45.1 43.1 41.1 39.2 37.2 35.3 33.3 31.4 29.4 27.4 26.5
40 104 48.4 46.2 44.4 41.9 39.7 37.5 35.3 33.2 31.0 28.8 27.7

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