California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 2 - Safe Practices and Personal Protection
Article 10 - Personal Safety Devices and Safeguards
Appendix A to Section 3396 - National Weather Service Heat Index Chart (2019)

Universal Citation: 8 CA Code of Regs A to Section 3396
Current through Register 2024 Notice Reg. No. 38, September 20, 2024

Relative Humidity %

Temperature °F

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
80 77 78 78 79 79 79 80 80 80 81 81 82 82 83 84 84 85 86 86 87
81 78 79 79 79 79 80 80 81 81 82 82 83 84 85 86 86 87 88 90 91
82 79 79 80 80 80 80 81 81 82 83 84 84 85 86 88 89 90 91 93 95
83 79 80 80 81 81 81 82 82 83 84 85 86 87 88 90 91 93 95 97 99
84 80 81 81 81 82 82 83 83 84 85 86 88 89 90 92 94 96 98 100 103
85 81 81 82 82 82 83 84 84 85 86 88 89 91 93 95 97 99 102 104 107
86 81 82 83 83 83 84 85 85 87 88 89 91 93 95 97 100 102 105 108 112
87 82 83 83 84 84 85 86 87 88 89 91 93 95 98 100 103 106 109 113 116
88 83 84 84 85 85 86 87 88 89 91 93 95 98 100 103 106 110 113 117 121
89 84 84 85 85 86 87 88 89 91 93 95 97 100 103 106 110 113 117 122
90 84 85 86 86 87 88 89 91 92 95 97 100 103 106 109 113 117 122 127
91 85 86 87 87 88 89 90 92 94 97 99 102 105 109 113 117 122 126 132
92 86 87 88 88 89 90 92 94 96 99 101 105 108 112 116 121 126 131
93 87 88 89 89 90 92 93 95 98 101 104 107 111 116 120 125 130 136
94 87 89 90 90 91 93 95 97 100 103 106 110 114 119 124 129 135 141
95 88 89 91 91 93 94 96 99 102 105 109 113 118 123 128 134 140
96 89 90 92 93 94 96 98 101 104 108 112 116 121 126 132 138 145
97 90 91 93 94 95 97 100 103 106 110 114 119 125 130 136 143 150
98 91 92 94 95 97 99 102 105 109 113 117 123 128 134 141 148
99 92 93 95 96 98 101 104 107 111 115 120 126 132 138 145 153
100 93 94 96 97 100 102 106 109 114 118 124 129 136 143 150 158
101 93 95 97 99 101 104 108 112 116 121 127 133 140 147 155
102 94 96 98 100 103 106 110 114 119 124 130 137 144 152 160
103 95 97 99 101 104 108 112 116 122 127 134 141 148 157 165
104 96 98 100 103 106 110 114 119 124 131 137 145 153 161
105 97 99 102 104 108 112 116 121 127 134 141 149 157 166
106 98 100 103 106 109 114 119 124 130 137 145 153 162 172
107 99 101 104 107 111 116 121 127 134 141 149 157 167
108 100 102 105 109 113 118 123 130 137 144 153 162 172
109 100 103 107 110 115 120 126 133 140 148 157 167 177
110 101 104 108 112 117 122 129 136 143 152 161 171
111 102 106 109 114 119 125 131 139 147 156 166 176
112 104 107 111 115 121 127 134 142 150 160 170 181
113 104 108 112 117 123 129 137 145 154 164 175
114 105 109 113 119 125 132 140 148 158 168 179
115 106 110 115 121 127 134 143 152 162 173 184
116 107 111 116 122 129 137 146 155 166 177
117 108 112 118 124 132 140 149 159 170 181
118 108 113 119 126 134 142 152 162 174 186
119 109 114 121 128 136 145 155 166 178
120 110 116 122 130 138 148 158 170 182
121 111 117 124 132 141 151 162 174 187
122 111 118 125 134 143 154 165 178
123 112 119 127 136 146 157 169 182
124 113 120 129 138 148 160 172
125 114 121 130 140 151 163 176

Note: Authority cited: Section 142.3, Labor Code. Reference: Sections 142.3, 144.6 and 6720, Labor Code.

Disclaimer: These regulations may not be the most recent version. California may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.