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The Weather and Climate in Peru

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Peru has a variety of climates according to the following areas:

The Andes:  Temperature is a reverse function of elevation changing from temperate (8°C average per year) in the sea-level valleys to cold (below 0°C average per year) in the highest altitudes.  Precipitation changes in unlike scales and has a marked seasonally.  The rainy season begins in September but peaks within January and March.  The dry season is from May-August.  The Andes consist of two conditions, the southwest-northeast rainfall slope on the driest conditions (between 200-500 mm/year) by the southwestern Andes, and the wettest conditions on the eastern gradients (more or less 1000 mm/year). 

The Coast: The coast climate is from warm-dry north of 5°S to cool-waterless south of 8°S.  In spite of the proximity to the equator (3°S-18°S), the whole coastal region has markedly temperature cycle in reaction to the lead results of the sea surface temperature.  January to March is the warmest period and from July to September is the coolest period. 

The temperature of the northern coast is from 14°C to 38°C. Summers are characterized by hot, wet and sunny weather.  Summer rainfall totals 200 mm exclude during strong El Niño cases, it can exceed to 4000 mm.  At night the temperature is from 20-23°C and 28-38°C throughout the day.  Winter is characterized by a comfortable weather and absence of rain.  During at night the temperature is from 14-18°C and 22-29°C throughout the day.

The central and southern coasts temperature is from 8 to 35°C and the rainfall is barely below 150 mm per year.  Summer is generally warm, damp and sunny; conditions on lows within 18 and 22°C and highs within 24 and 30°C.  Winter has covered clouds, cool and moist conditions.

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