Which is colder, Zigong or Nanchong?

Zigong is cold. 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, extreme maximum temperature of 40, 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.