Abstract
This study investigated the Wet-bulb Globe Temperature (WBGT) within a urban residential district based on a mobile observation. The difference in clearsky and cloudy conditions are examined. The observation pathway extends about 3 km. In this observation, WBGT changed about 5 degrees along the whole observation route even though the street surface was monotonically asphaltic paving. Although WBGT in different cloudiness conditions were almost same, it was mainly attributed to the globe temperature under clearsky, but to the wet-bulb temperature under cloudy condition. In addition, it was also observed that a street within a residential area is more humid than in a borad street.
