In the construction of tall structures, weather have strong influences on their constructability. In this study, therefore the influence of weather on the construction at 14 tall structure sites was studied by investigating job diaries, interviewing supervisors and workers and sending out questionnaires to workers. From this investigation, it was clarified that: (1) the ratio of idle construction of towers with 300m height was as much as 15% because of bad weather, (2) in construction of tall bridge pylons the critical factor was wind, while construction of tall buildings was mainly influenced by rainfall, (3) construction work was usually executed even under unacceptably cold or hot weather, while under wind or rainfall, it was often stopped.