Abstract:According to the climatic data from an automatic weather station (AWS) and the meteorological tower at Namco Station (30°46.44′N，90°59.31′E，4730 m asl.) during July 14，2005 to July 13，2006,seasonal and diurnal variations o f air temperature，air pressure，relative humidity, precipitation，wind speed an d wind direction were analyzed. Some preliminary knowledges on climatic features of this area were obtained: The average annual temperature is 0℃，the minimum temperature appears in December and the maximum temperature in July. The annual rainfall is 281.8 mm，mainly taking place from May to October. The average annual relative h umidity is 52.6%, and the wet and dry seasons are distinct，the precipitation ha ppening at night (20:00—8:00) accounts for 78.6% of the total. The a verage annual air pressure is 571.2 hPa，the minimum pressure occurs in January and the maximum pressure in September；Mean annual wind speed is 4 m?s-1 ，the maxi mum wind speed occurs in January (6.1m?s-1),there are strong winds in the afternoo n and weak winds in the morning. The annual gale days are 53 d，and 36% of it ha ppens in January. The dominant wind direction is from SE to S（135°-270°），wi nd cycle between the land and lake area is remarkable in summer.