Located in west China, Lanzhou has the distinct features of a semi-arid climate, characterized by dryness and abundant sunlight. The annual average temperature is about 9.3 degrees C.

Winter here is long and cold, but not freezing, with relatively little snow and rain. Spring is transient with sharp temperature swings. Summer is short and hot, but not sweltering. Autumn witnesses rapid temperature drops from its peak in July. Travelers, hikers and the like are strongly advised to bring along thick overcoats in the mercurial winter months.