This study aimed to calibrate the physiological equivalent temperature (PET) index range for Cuiabá-MT, a city with a tropical climate, for which PET calibration was not previously conducted. The air temperature, relative humidity, globe temperature, wind speed, and direction were measured in three scenarios: arboreal shading (S1), artificial shading with parasol (S2), and sun exposure (S3). Questionnaires were administered to a group of 30 people to verify the preferences, perceptions, and levels of thermal comfort of respondents with data processing, using RayMan software. The values with the greatest differences were between S1 (wooded) and S3 (sun exposure). Five categories of the PET index were adapted: slightly cold, comfortable, slightly hot, hot, and very hot. The comfortable range was found to be between 23.01 and 34.64 °C. When performing the correlation of the users' responses regarding their thermal perceptions and preferences in the different scenarios, it was found that in S1, the percentage of thermal comfort was the highest and in S3, the percentage of thermal discomfort was the highest, reinforcing the significance of afforestation in thermal comfort. The findings of this study contribute to the clarification of issues related to thermal perception and comfort in open spaces in tropical climate.

本研究旨在校准具有热带气候的城市 Cuiabá-MT 的生理等效温度 (PET) 指数范围，此前未进行过 PET 校准。在三个场景中测量了气温、相对湿度、地球温度、风速和风向：树栖遮荫（S1）、遮阳伞人工遮荫（S2）和阳光照射（S3）。使用 RayMan 软件对一组 30 人进行问卷调查，以通过数据处理验证受访者的偏好、感知和热舒适度。差异最大的值在 S1（树木繁茂）和 S3（阳光照射）之间。对PET指数的五类进行了调整：微冷、舒适、微热、热和非常热。发现舒适范围在 23.01 和 34.64 °C 之间。在对不同场景下用户对热感知和偏好的反应进行相关性分析时，发现在 S1 中，热舒适百分比最高，在 S3 中，热不适百分比最高，强化了造林在热舒适方面的意义。这项研究的结果有助于澄清与热带气候下开放空间的热感知和舒适度相关的问题。