weather on the Sierra
Mountainous area dominated by the Andes. Reaches 6768 m.s.n.m. at the summit of Huascaran.
In the highlands of Peru are two well-defined seasons: the dry season from April to October, characterized by sunny days, cool nights and no rain (the ideal time to visit), and the rainy season from November to March , where rainfall is abundant (generally above 1,000 mm). Some general characteristics of Andean climates are dry air, the sunshine, which decreases in summer, and the temperature differences between sun and shade, night and day, morning and evening.
Attitudinal floors in the mountains:
Warm floor (1,000 to 2,000 meters)
On this floor the differences between the western and eastern slopes are very large. On the western side, is general aridity of Freedom to Tacna. On the eastern side there is a period with high rainfall in summer. The humidity is high and is favored by Amazonian tropical air masses.
Flat tempered (2,000 to 3,500 meters)
The average temperature is 10-16 ° C, but the maximum range at 29 ° C for greater exposure to the sun in some places, and the minimum between 7 and 4.4 degrees Celsius from June to August. Average temperatures that typify this climate are a result of variations in temperature between day and night in the year produced.
Flat tempered cold (3,500 to 4,000 meters)
It is located in both the western and eastern side, at the upper limits of the highlands. The average temperature is between 7 and 10 ° C, while the maximum range between 19 and 22.5 ° C.
The city of Puno, on the influence of Titicaca, has an average temperature of 8.4 ° C to 16.4 ° C maximum, minimum of -1.3 ° C, and a temperature range of 18 ° C. Juliaca, at the same altitude but without the influence of Titicaca, has an average annual temperature of 7.1 ° C, with an absolute maximum temperature of 2.5 ° C and an absolute minimum of -16.8 ° C. Its annual temperature range of 38.3 ° C, is the highest on this floor.
Cold floor (4,000 R 5,000 m)
The weather is cold, dry air and high temperature variations. The average annual temperature is more than 3 ° C and below 6 ° C.
These figures do not show the dramatic differences in temperature sometimes in a single day. At an altitude of 4,887 meters have been observed declines 11 ° C only five minutes after the clouds hid the sun However, daytime temperatures are always positive and insolation is high. But at night, temperatures drop to O ° C, resulting in marshes and streams freeze, thaw at dawn.
Floor Very Hot (5000 R 6746 masl)
Their temperatures are comparable to The math characterize polar peripheral areas.
It is a cold or polar climate in the tropics, although phenomena extrazonal glaciers are not established in the tropics.
While persist ice and snow, the area receives sunshine throughout the year.
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