Located at an elevation of 1,890 m on the Yungui Plateau with low latitude and high elevation, Kunming has one of the mildest climates in China, characterised by short, cool dry winters with mild days and crisp nights, and long, warm and humid summers, but much cooler than the lowlands. The weather never gets very hot in summer; the temperature has exceeded 30 °C (86 °F) only on a handful of occasions. However, freak snowfalls occur in occasional winters. Controlled by a subtropical highland climate (Köppen Cwb), average highs are around 15 °C (59 °F) in winter and 24 °C (75 °F) in summer. With its perpetual spring-like weather which provides the ideal climate for plants and flowers, Kunming is known as the "City of Eternal Spring". The city is covered with blossoms and lush vegetation all-year round. The period from May to October is the rainy season and the rest of the year is dry. The city has a mean annual rainfall of 1,010 millimetres (40 in), with an annual sunshine period of 2,250 hours and an annual frost-free period of 230 days. Extreme temperatures in the city have ranged from −7.8 °C (18 °F) to 32.2 °C (90
