section_path: Geography/Climate
section_name: Climate
paragraph_text: Climate
  
  Beijing has a monsoon-influenced humid continental climate (Köppen: Dwa), bordering on a cold semi-arid climate (Köppen: BSk) in the south and in the northwest, characterized by hot, humid summers due to the East Asian monsoon, and brief but cold, dry winters that reflect the influence of the vast Siberian anticyclone. Spring can bear witness to sandstorms blowing in from the Gobi Desert across the Mongolian steppe, accompanied by rapidly warming, but generally dry, conditions. Autumn, similar to spring, is a season of transition and minimal precipitation. According to China's seasonal division standard, Beijing enters spring on March 26, summer on May 20, autumn on September 13, and winter on October 31. The average annual temperature in the urban area of Beijing is 12.9 °C (55.2 °F) to 13.3 °C (55.9 °F), of which the average daily minimum temperature is 7.7 °C (45.9 °F) to 8.4 °C (47.1 °F), and the average daily maximum temperature is 18.5 °C (65.3 °F) to 18.9 °C (66.0 °F). The monthly daily average temperature in January is −2.7 °C (27.1 °F), while in July it is 27.2 °C (81.0 °F). Precipitation averages around 528.0 mm (20.8 in) annually (Haidian and Chaoyang has an average annual precipitation of 584.2 mm (23.0 in)), with close to three-quarters of that total falling from June to August. With monthly percent possible sunshine ranging from 42% in July to 62% in January and February, the city receives 2,490.5 hours of bright sunshine annually. Extremes since 1951 have ranged from −27.4 °C (−17.3 °F) on 22 February 1966 to 41.9 °C (107.4 °F) on 24 July 1999 (unofficial record of 42.6 °C (108.7 °F) was set on 15 June 1942).