📑 How to Use This Tool
Follow these simple steps to check the heat index:
- Enter the air temperature in degrees Celsius (°C) in the first field.
- Enter the relative humidity percentage (%) in the second field.
- Click the "Calculate Heat Index" button to compute the result.
- The result will show the feels-like temperature and a heat status level.
- Refer to the reference table below for detailed status descriptions.
Formula Used: Heat Index = Temperature + (0.33 × Humidity) − 4
Source: National Oceanic and Atmospheric Administration (NOAA)
Enter Weather Data
Heat Index Reference Table
The table below shows expected heat index ranges based on temperature and humidity combinations, along with their corresponding status levels as defined by NOAA.
| Temp (°C) | Humidity (%) | Heat Index (°C) | Status |
|---|---|---|---|
| 20 – 24 | 30 – 50 | ≤ 27 | Comfortable / Cool |
| 25 – 27 | 40 – 60 | 28 – 32 | Warm |
| 28 – 31 | 50 – 70 | 33 – 37 | Hot |
| 32 – 35 | 60 – 80 | 38 – 41 | Very Hot / Caution |
| 36+ | 70 – 100 | ≥ 42 | Extreme Heat / Danger |