The potential in the county is inclined from northwest to southeast, with low mountains and hills in the northwest and the sea in the southeast. The landform is low mountain-hilly platform-valley basin-coastal plain-beach, island reef in turn, and mountains, rivers and land are in the same direction. The coastline twists and turns as long as 2 16 km, ranking second in Fujian Province. Zhangpu county belongs to the south subtropical maritime monsoon climate, with abundant heat, rainfall and sunshine. However, the meteorological seasons such as temperature, rainfall and sunshine vary greatly. The annual average temperature is 2 1℃, which is basically frost-free. The annual average daily temperature is 2 1 19 hours, the annual average total solar radiation is 132.76 kcal/cm2, and the annual average rainfall is 1524.7 mm.
Affected by topography, the whole county can be divided into three climatic zones: mountainous and hilly areas in the northwest, plain areas in the middle and coastal areas, with different temperatures and rainfall. Generally speaking, the temperature in the northwest mountainous area and hilly area is lower than 1 ~ 2℃ in the central plain and 1 ~ 2℃ in the coastal area. Moreover, the temperature difference between day and night in northwest mountainous areas and high hilly areas is greater than that in the central plain, which is greater than that in coastal areas. There is more rainfall in mountainous areas than in plains, and more in plains than in coastal areas.
Mountainous and hilly areas in northwest China: including Guanxun, Changqiao, Maping, Nanpu, Chiling, Huxi and the upper part of Pomegranate Town. The annual average temperature is 18℃, the highest temperature is 33℃, the lowest temperature is -4.7℃, and the annual average frost days are 5 ~ 6 days. In Zhenche Village, the highest altitude, there are frost days every year. The annual average precipitation is1750mm.
Central Plains: Including Sui 'an, Old Town, Songkhla, Pantuo and other towns. The annual average temperature is 265438 0℃, with the highest temperature of 33℃ and the lowest temperature of -2.4℃. The average annual frost days are 3 ~ 4 days, and there is no frost in some years. Average annual precipitation 1434.4 mm (including southern slope of Liangshan in Pantuo Town 1700 mm).
Coastal zone: including Fotan, Chihu, Qianting, Liu Ao, Xiamei, Du Xun, Shaxi and Gu Lei. The annual average temperature is 20℃, the highest is above 28℃, and the lowest is 3℃. There is no frost all year round, and the average annual precipitation is 100 mm, including 1 170 mm near the mountain and 900 mm on the peninsula.