Climate of Yibin
Yibin City has a humid monsoon climate in the middle subtropics, and the low hills and river valleys have the climate attributes of south subtropics. It has the characteristics of mild climate, abundant heat, abundant rainfall, suitable illumination, long frost free period, warm winter and early spring, and distinct four seasons. The annual average temperature is about 18 ℃, and the annual average precipitation is 1050-1618 mm. The rainy season is from May to October, accounting for 81.7% of the whole year. The main flood season is from July to September, and the rainfall is more concentrated, accounting for 51% of the total annual rainfall. The annual average sunshine is 1000-1130 hours, and the frost free period is 334-360 days. The annual average wind speed is only 1.23 M / s, mostly northwest wind and northeast wind. The frequency of quiet wind is large, up to 34-53%, and the wind speed is small.