Temperature spatial variability in an urbanized area, 1.5km square, near the center of Osaka city was observed in summer 2008. Temperature data were collected by observation stations located in 10 parks and by a vehicle equipped with a mobile measurement system. As a result of geostatistical analysis using semivariogram, spatial dependence of temperature in the daytime, when wind from Osaka bay, is higher than at other times. This means that correlation between temperature data collected at adjacent points while there was sea breeze was higher than at times without a sea breeze. Spatial representation of the temperature data on the day with a sea breeze was 100m in the daytime and 200m in the early morning.
