The climate of Peru, because of its considerable size from north to south and the difference in altitude between the various areas of the country, is very varied. The climate of the country is greatly influenced by the presence of the chain of the Andes and from the cold Humboldt Current along the coasts of the Pacific Ocean. In general along the coast the climate is sub-tropical dry with very little rain. The summer runs from December to February and are hot (26 to 30°C); winters are chilly (10 to 18°C) and usually hazy all day long. Along the Andes Mountains, the climate has two seasons – a rainy summer (Oct- Apr) and a dry winter (May – Sept). The Amazon area has warm humid climate with rainfall throughout the year and a relatively short dry season between June and August.