Like many of the countries located near Ecuador, the climate in Peru is strongly influenced by altitude. In the southern hemisphere, the seasons are reversed compared to the northern hemisphere. Nevertheless, in Peru, this rule presents some exceptions. In order to account for the climate as well as possible, we thus propose to give a total outline of the various areas, as well as the precise data of the significant cities.
The Peruvian capital enjoys a particular microclimate originated in the cold current of Humboldt which skirts the coast. During the winter (June at October), the city is covered with a thick fog (the "garua") very wet which in general stagnates all the day. In July and August the weather is colder and hotter clothing are recommended.
Spring is spread out from October to December. The temperature is nice the day but fresher the evening and in the morning.
From December to the end of March, it is the summer: it's very warm during the day but more bearable in the evening. The hot seasons is in January and February. The summer clothes are enough in this season.
Lastly, the autumn extends from April to June. The weather is warm with possibilities of garua. During the evening the weather is fresher.
In a general way, it seldom rains in Lima, the rainwears are thus not necessary.
The garua is present only in a radius of 50 km around Lima ... On the remainder of the coast the climate is rather desert: practically it never rains and it's hot season all the year. The hottest months extend from December to March. Attention however, the evening in winter is fresher and a sweater can be welcome!
The mountain (sierra)
The climate in the mountains is inversed in relation to the costal ones, similarly to northern hemisphere.
There are two seasons, the dry one and the humid one, each one has advantages. The dry season begins in April and finish in October, itss sunny during the day but cold during the night. The humid season goes from November to March and is rainy but with sunny mornings and nice weather before and alter the rain. Also the mountain is always beautiful in the summer as well as in the winter.
The forest (selva)
Similarly to the mountain, the forest has two seasons, the hot and the dry one, both of them are usually hot.
The dry season that begins in April and finish in October is sunny during the day and hot at night, and the humid season that goes from November to March is rainy and fresher during the nights.
In Iquitos particularly there is no difference in seasons, the climate is hot during all year, we see only a difference in the level of river in the "humid" season going from November to April, humidity can reach 80 to 90%.
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