Yearly Weather for Lanzhou, Gansu, China

Lanzhou is situated in the temperate zone and enjoys a semi-arid climate with hot summers and cold and dry winters. Diurnal temperature ranges tend to be somewhat large due to the high elevation and aridity. The mean annual temperature is 9.8 °C (49.6 °F), while annual rainfall is 315 millimeters (12.4 in), almost all of which falls from May to October. The winters are so dry that snow is extremely rare.

In regard to air pollution Lanzhou has some of the worst air quality of all cities in China. According to the Blacksmith Institute, Lanzhou is one of the 30 most polluted cities in the world, with its TSP (total suspended particle) rating 247% above that of the Gansu State recommendation.