| Air Temp-> | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | |
| Humidity | |||||||||
| 0 % | 64 | 69 | 73 | 78 | 83 | 87 | 91 | 95 | |
| 10 % | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | |
| 20 % | 66 | 72 | 77 | 82 | 87 | 93 | 99 | 105 | |
| 30 % | 67 | 73 | 78 | 84 | 90 | 96 | 104 | 113 | |
| 40 % | 68 | 74 | 79 | 86 | 93 | 101 | 110 | 123 | |
| 50 % | 69 | 75 | 81 | 88 | 96 | 107 | 120 | 135 | |
| 60 % | 70 | 76 | 82 | 90 | 100 | 114 | 132 | 149 | |
| 70 % | 70 | 77 | 85 | 93 | 106 | 124 | 144 | ||
| 80 % | 71 | 78 | 86 | 97 | 113 | 136 | |||
| 90 % | 71 | 79 | 88 | 102 | 122 | ||||
| 100 % | 72 | 80 | 91 | 108 |
| 90-105 | Heat cramps or heat exhaustion possible. | |
| 105-130 | Heat cramps or heat exhaustion likely, heatstroke possible. | |
| 130+ | Heatstroke highly likely. |