Tucson, Arizona Cotton Heat Stress for 2026 DOY = Day of year ns = No Stress : Stress Value less than 82.4 L1 = Stress Level 1 : Stress Value from 82.4 to 86 L2 = Stress Level 2 : Stress Value greater than 86 DOY Date Stress --- ------ --------- 121 May 1 66.0 ns 122 May 2 69.3 ns 123 May 3 72.2 ns 124 May 4 65.9 ns 125 May 5 62.5 ns 126 May 6 61.7 ns 127 May 7 65.9 ns 128 May 8 68.8 ns 129 May 9 72.3 ns 130 May 10 73.3 ns 131 May 11 76.0 ns 132 May 12 77.9 ns 133 May 13 73.9 ns 134 May 14 72.9 ns 135 May 15 70.4 ns 136 May 16 71.4 ns 137 May 17 70.6 ns 138 May 18 69.4 ns 139 May 19 69.0 ns 140 May 20 68.8 ns 141 May 21 69.5 ns 142 May 22 70.5 ns 143 May 23 73.0 ns 144 May 24 73.2 ns 145 May 25 73.3 ns 146 May 26 70.3 ns 147 May 27 70.6 ns 148 May 28 68.1 ns 149 May 29 67.1 ns 150 May 30 68.2 ns 151 May 31 70.9 ns 152 Jun 1 74.2 ns 153 Jun 2 75.8 ns 154 Jun 3 76.6 ns 155 Jun 4 78.8 ns 156 Jun 5 77.2 ns 157 Jun 6 77.5 ns 158 Jun 7 78.4 ns 159 Jun 8 76.9 ns 160 Jun 9 78.7 ns 161 Jun 10 79.6 ns 162 Jun 11 80.5 ns 163 Jun 12 82.5 L1 164 Jun 13 84.2 L1 165 Jun 14 82.5 L1 166 Jun 15 79.1 ns 167 Jun 16 82.1 ns 168 Jun 17 79.1 ns 169 Jun 18 78.8 ns 170 Jun 19 78.0 ns 171 Jun 20 77.4 ns 172 Jun 21 76.5 ns 173 Jun 22 79.0 ns 174 Jun 23 82.8 L1 175 Jun 24 84.2 L1 176 Jun 25 82.9 L1 177 Jun 26 82.7 L1 178 Jun 27 82.5 L1 179 Jun 28 79.7 ns 180 Jun 29 78.9 ns 181 Jun 30 77.9 ns 182 Jul 1 75.4 ns 183 Jul 2 74.8 ns 184 Jul 3 75.1 ns 185 Jul 4 78.4 ns 186 Jul 5 80.7 ns 187 Jul 6 81.2 ns 188 Jul 7 83.4 L1 189 Jul 8 84.6 L1