Table 1 Thermal sensation and different groups of UTCI
From: Universal Thermal Climate Index (UTCI) and adverse pregnancy outcomes in Ahvaz, Iran
UTCI (°C) in Iran* | Thermal sensation | Physiological stress level |
|---|---|---|
 < − 40 | Very cold | Extreme cold stress |
−  27 to −  40 | Cold | Very strong cold stress |
−  13 to −  27 | Cool | Strong cold stress |
0 to − 13 | Slightly cool | Moderate cold stress |
0 to 9 | Comfortable | Slight cold stress |
9 to 26 | Slightly warm | No thermal stress |
26 to 32 | Warm | Moderate heat stress |
32 to 38 | Hot | Strong heat stress |
38 to 46 | Very hot | Very strong heat stress |
 > 46 |  | Extreme heat stress |