| UTCI (°C) | Stress category |
|---|---|
| Above +46 | Extreme heat stress |
| +38 to +46 | Very strong heat stress |
| +32 to +38 | Strong heat stress |
| +26 to +32 | Moderate heat stress |
| +9 to +26 | No thermal stress |
| +9 to 0 | Slight cold stress |
| 0 to −13 | Moderate cold stress |
| −13 to −27 | Strong cold stress |
| −27 to −40 | Very strong cold stress |
| Below −40 | Extreme cold stress |