✔ 最佳答案
Sichuan is in the subtropics, because the terrain and the different monsoon circulation in turn influence, the climate complex is diverse. Approximate saying, the eastern part sichuan pendi is the subtropics humid climate; But the western plateau area the terrain influence, by the vertical climatic zone primarily, this area from the south to north, the weather pattern gradually transits by the subtropics to subfrigid zone, but in the vertical direction distributes has from the subtropics to the ever-frost belt each kind of weather pattern. The sichuan pendi whole year the sunshine 900~1600 hour, is the national sunshine least areas.
Eastern part sichuan pendi annual mean temperature 14~19 ℃, (for example middle and lower reaches Yangtze River area) is higher than the Chinese same latitude other areas 1 ℃ about. Among them, coldest 1 monthly mean temperature 3~8 ℃, hottest 7 monthly means temperature 25 ℃ ~29 ℃, spring and the autumn temperature approaches the annual mean temperature. This local four seasons are distinct, frost-free period is the 280~300 day.
The western Sichuan plateau majority of areas annual mean temperature is smaller than 8 ℃, 1 monthly mean temperature -5 ℃ about, 7 monthly means temperatures also only have 10 ℃ ~15 ℃, whole year does not have the summer, the winter is long.But south western Sichuan the mountainous region annual mean temperature, because of the terrain but different, the common valley is 15 ℃ ~20 ℃, the mountainous region is 5 ℃ ~15 ℃.