This heat index reference table shows the heat index (feels like) for a range of temperature values, assuming a relative humidity of 7%. Every figure is computed with the same engine that powers our Heat Index Calculator, so the numbers are exact.
| Temperature | Heat index (feels like) |
|---|---|
| 23 °F | 217.2 |
| 45 °F | 111.9 |
| 68 °F | 73.7 |
| 90 °F | 105.9 |
| 140 °F | 429.0 |
| 180 °F | 937.4 |
| 270 °F | 2,893.6 |
| 450 °F | 10,179.9 |
| 630 °F | 21,964.8 |
| 900 °F | 48,077.1 |
How to use this table
Find the row closest to your temperature and read across to the heat index (feels like). For a value between two rows, the real figure sits between them — or enter your exact numbers in the Heat Index Calculator for a precise answer.
Need a value that is not in the table? — the Heat Index Calculator does it instantly, for free, with the formula and a worked example built in.
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