This research investigated the indoor air temperature and relative humidity profiles for 18 patient rooms in surgical, medical, cardiology and oncology wards in two hospitals. Also, 522 patient thermal surveys were completed in parallel with the monitoring task. The monitoring covered the hottest summer months; June, July, August, September in 2018 in Saudi Arabia. The selected hospitals were (i) the International Medical Centre (IMC), Jeddah and (ii) King Abdullah Medical City (KAMC), Makkah.Longitudinal monitoring of indoor temperature and relative humidity was conducted over an extended period of time. Thermal comfort surveys were administrated to inpatients.18 Raspberry Pi+3 dataloggers were mounted in 18 patient rooms across the two hospitals. Each datalogger has two sensors; a probe wire for temperature and a tiny sensor for humidity. Readings were transferred off the dataloggers every two weeks during site visits
