Sichuan enjoys a unique climate due to the region's uncommon topography and the influence of alternating weather patterns. Sichuan's eastern basin is characterized by warm winters,?dry?springs, hot summers and rainy autumns while the Western Sichuan plateau and mountain areas?by long winters, sufficient sunshine, and distinct dry and rainy seasons; vertical climate changes are significant and climate types are varied.

The Sichuan Basin has a subtropical monsoon climate. It is also typically very cloudy in winters. The average temperature is 5-8 degrees Celsius in January and 25-29 degrees Celsius?in July. The annual average temperature stands at 15-19 degrees Celsius. Chengdu?has?about 250 cloudy or rainy days per annum.

The Western Sichuan plateau areas are quite cool and have an average annual temperature of less than 8 degrees Celsius. The average temperature is 5 degrees Celsius below zero in January, 5 to 10 degrees Celsius?in April, 10 to 15 degrees Celsius?in June and 5 degrees Celsius?in October. In fact, Western Sichuan has almost no summer.