HEAT INDEX CHART
TEMPERATURE
(Deg F/Deg C)
RELATIVE HUMIDITY (%)
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
120/49
117 111 116 123 130 139 148 NA
115/46
103 107 111 115 120 127 135 143 151 NA
110/43
99 102 105 108 112 117 123 130 137 143 150 NA
105/41
95 97 100 102 105 109 113 118 123 129 135 142 149 NA
100/38
91 93 95 97 99 101 104 107 110 115 120 126 132 138 144 NA
95/35
87 88 90 91 93 94 96 98 101 104 107 110 114 119 124 130 136 NA
90/32
83 84 85 86 87 88 90 91 93 95 96 98 100 102 106 109 113 117 122 NA
85/29
78 79 80 81 82 83 84 85 86 87 88 89 90 91 93 95 97 99 102 105 108
80/27
73 74 75 76 77 77 78 79 79 80 81 81 82 83 85 86 86 87 88 89 91
75/24
69 69 70 71 72 72 73 73 74 74 75 75 76 76 77 77 78 78 79 79 80


KEY

VERY WARM - FATIGUE POSSIBLE WITH PROLONGED EXPOSURE HOT - SUNSTROKE,HEAT CRAMPS AND HEAT EXHAUSTION POSSIBLE WITH PROLONGED EXPOSURE VERY HOT - SUNSTROKE, HEAT CRAMPS, OR HEAT EXHAUSTION LIKELY, HEATSTROKE POSSIBLE WITH PROLONGED EXPOSURE EXTREMELY HOT - HEAT STROKE OR SUNSTROKE IMMINENT