Geographical and climatic conditions of Sandu

Sandu County belongs to Qiannan Buyi and Miao Autonomous Prefecture, Guizhou Province, and is located in the southeast of Qiannan Buyi and Miao Autonomous Prefecture. It is the only Shui Autonomous County in China.

Subtropical monsoon climate

Sandu County has long summer and short winter, with clear spring and autumn, no heat in summer and no cold in winter. The climate belongs to subtropical humid monsoon climate type. Due to the complex influence of topography, landform, landform and altitude, the climate of Sandu is geographically different, and the county is divided into three climate zones: warm, warm and mild. Annual average temperature 18.2℃, 1 month average temperature 7.8℃, July average temperature 26.6℃, extreme maximum temperature 39.2℃, extreme minimum temperature minus 3.5℃, and annual total accumulated temperature 6603. 1℃. China has abundant rainfall, with an annual average rainfall of 1, 326438+0mm. There are few sunshine hours, and the annual sunshine hours are 1 13 1.4 hours. The annual frost-free period is 326 days, with a minimum of 275 days. The vertical change of temperature is very obvious. Climate disasters are frequent, among which severe weather such as drought, rainstorm, late spring cold, autumn rain, hail and freezing have great influence on crops.