Abstract
The air temperature were observed in Ueda City, Nagano from April 2006 to March 2007. The automatic weather stations were conducted above the main road and the roof of the City Hall in a downtown area as urban sites, above the center space of a large paddy field and the neighboring steep slope as a rural site. There was the maximum of urban lapse rate(ULR) in the potential temperature about 10:00 and the minimum about 14:00 and ULR became about 0 at night. There was the minimum of rural lapse rate(RLR) in the potential temperature about 16:00 and RLR became minus in the daytime and plus at night. Heat island intensity(HII) became minus before noon and became large after noon. The maximum occurred at 18:00 and HII became small until sunrise.
