Is Zigong in Sichuan tropical or subtropical?

Zigong's climate belongs to subtropical monsoon climate zone. The sunshine time is short, the four seasons are distinct and cloudy weather is common. The climate is warm, with annual average temperature 17.0- 18.0 degrees, extreme maximum temperature of 40 degrees and annual sunshine 1 150- 1200 hours. The frost-free period is 320-350 days. There is abundant rainfall, with an average annual precipitation of 1000- 1 100 mm.

It belongs to a typical basin climate with the characteristics of early spring, hot summer, cool autumn and warm winter. Zigong has a foggy climate and short sunshine time. The folk proverb "Shu dog barks at the sun" is an image description of this climate feature. The air in Zigong is very humid. Although the temperature is not high in summer, the average maximum temperature generally does not exceed 30 degrees Celsius, which often makes people feel sultry. The temperature is not low in winter, and the average monthly temperature is above 5 degrees Celsius. However, due to the influence of cloudy days and air tides, the rain in Zigong is concentrated in July and August, with a monthly rainfall of more than 200 mm and an average rainy day of 16- 18 days. In winter and spring, there is little rain and little snow and ice.