section_path: Geography/Climate
section_name: Climate
paragraph_text: Climate
  
  Chengdu has a monsoon -influenced humid subtropical climate (Köppen Cwa) and is largely warm with high relative humidity all year. It has four distinct seasons, with moderate rainfall concentrated mainly in the warmer months, and relieved from both sweltering summers and freezing winters. The Qin Mountains (Qinling) to the far north help shield the city from cold Siberian winds in the winter; because of this, the short winter is milder than in the Lower Yangtze. The 24-hour daily mean temperature in January is 5.9 °C (42.6 °F), and snow is rare but there are a few periods of frost each winter. The summer is hot and humid, but not to the extent of the " Three Furnaces " cities of Chongqing, Wuhan, and Nanjing, all of which lie in the Yangtze basin. The 24-hour daily mean temperature in July and August is around 25 °C (77 °F), with afternoon highs sometimes reaching 33 °C (91 °F); sustained heat as found in much of eastern China is rare. Rainfall occurs most frequently and is concentrated in July and August, with very little of it in the cooler months. Chengdu also has one of the lowest annual sunshine totals nationally, with less sunshine annually than much of Northern Europe. With monthly percent possible sunshine ranging from 15 percent in December to 32 percent in August, the city receives 1006 hours of bright sunshine annually. Spring (March–April) tends to be sunnier and warmer in the day than autumn (October–November). The annual mean is 16.9 °C (62.4 °F), and extremes have ranged from −6.5 °C (20 °F) to 39.4 °C (102.9 °F).