Heat Index Calculator
Enter temperature and humidity to calculate heat index
Heat Index Chart
This chart shows how hot it really feels when relative humidity is combined with the actual air temperature.
| Relative Humidity (%) | 40% | 45% | 50% | 55% | 60% | 65% | 70% | 75% | 80% | 85% | 90% | 95% | 100% |
|---|
Caution
Extreme Caution
Danger
Extreme Danger