Mountains in Western Sichuan is usually called Hengduan Mountains, located by the east of Tibetan Plateau. It has dry winter and usually less dry summer. The monsoon comes by June and last til September for most parts of this area. Usual climbing seasons include April to May, September to November. Former climbs were done in these seasons although winter climbs have been conducted a few times here.
In general, temperature expect at 4000 meters in western Sichuan: (in Celsius)
Gangga Range in November at 4550m
Gangga Range in September at 4600m
Genyen in July at 4550m
Genyen in September at 4300m
Genyen in November at 4900m
Genyen in October at 4700m
Genyen in June at 5050m
Siguniang in January at 3850m
Siguniang in April at 4500m
Siguniang in January at 3650m
Siguniang in May at 4600m
Siguniang in October at 5000m
Siguniang in February at 3800m
Minya Konka in September at 4200m
Minya Konka in December at 4300m
Minya Konka in October at 3900m
Minya Konka in June at 5300m
Route: Chengdu - Mt.Siguniang - Chengdu
Route: Chengdu - Gongga - Chengdu
Route: Chengdu - Gongga - Chengdu