Lima has a mild climate, despite its location in the tropics and in a desert. Lima's proximity to the waters of the Pacific Ocean leads to intense maritime moderation of the temperatures, thereby making the climate much milder than those to be expected for a tropical desert, and thus Lima can be classified as a desert climate (Köppen: ''BWh'') with subtropical temperature ranges. Temperatures rarely fall below  or rise above . Two distinct seasons can be identified: summer, December through April, and winter from June through September/October. May and October/November are generally transition months, with a more dramatic warm-to-cool weather transition in later May or/and earlier June.