Climate of the Coast of Peru

CLIMATE OF THE COAST OF PERU: INFO ON WEATHER & SEASONS. Graphs: hours of sunshine, overcast, rainfall, temperatures, etc.

The climatic conditions along the coast gradually change from semi desert or arid at the border with Ecuador to one of the driest desert climates in the world in the center and south, even though some variations occur, either to still drier conditions or to more humid conditions due to intense fog formation caused by the Humboldt current.

 

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In Capital Lima, rain is rare, even though half of the year, the sky is overcast. During the winter on the southern Hemisphere, from June to October, the temperature may barely reach 20 °C, the sky is overcast and a morning fog or drizzle may bring some precipitation, while humidity is high. In summer, from December to April, the weather often is a bit sunnier but it may still be cloudy; temperatures may get as high as 29 °C. Night temperatures vary from 14 °C in winter to 20 °C in summer. Like anywhere else on the coast of Peru, the climate gets seriously disrupted during El Niño years, when currents from the North bring considerable warmer water to the coast. Air temperatures rise considerably and heavy rains wreak havoc on the desert environments.

 

Rivers, however flow down from the Andes highlands, thereby bringing water for irrigation, and everywhere around river beds along the coast, one finds irrigated systems and highly productive farms in spite of the desert nature of the climate of the coast of Peru.

 

Climate data for Lima

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Average high °C (°F)

25.8
(78.4)

26.5
(79.7)

26.0
(78.8)

24.3
(75.7)

21.7
(71.1)

19.7
(67.5)

18.7
(65.7)

18.4
(65.1)

18.7
(65.7)

19.9
(67.8)

21.9
(71.4)

23.9
(75)

22.1
(71.8)

Average low °C (°F)

19.1
(66.4)

19.4
(66.9)

19.2
(66.6)

17.6
(63.7)

16.1
(61)

15.3
(59.5)

15.0
(59)

14.6
(58.3)

14.6
(58.3)

15.2
(59.4)

16.4
(61.5)

17.7
(63.9)

16.7
(62.1)

Precipitation mm (inches)

0.9
(0.035)

0.3
(0.012)

4.9
(0.193)

0.0
(0)

0.1
(0.004)

0.3
(0.012)

0.3
(0.012)

0.3
(0.012)

5.4
(0.213)

0.2
(0.008)

0.0
(0)

0.3
(0.012)

13.0
(0.512)

 % humidity

81.6

82.1

82.7

85.0

85.1

85.1

84.8

84.8

85.5

83.5

82.1

81.5

82.8

Mean monthly sunshine hours

179.1

169.0

139.2

184.0

116.4

50.6

28.6

32.3

37.3

65.3

89.0

139.2

1,230

 

The climate in the city of Nazca is even dryer that that of Lima; many days start out being overcast, but then, the skies often clear up by 9:00hrs in the morning, which is important for the flights over the Nazca lines. Closer to the coast however, in the San Fernando National Reserve, the weather is often very windy and frequently rather chilly. So, bring a jacket.

 

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Average high °C (°F)

30.7
(87.3)

31.3
(88.3)

31.3
(88.3)

30.4
(86.7)

28.3
(82.9)

27.1
(80.8)

25.3
(77.5)

26.5
(79.7)

28.3
(82.9)

28.9
(84)

29.8
(85.6)

30.0
(86)

28.99
(84.17)

Average low °C (°F)

16.8
(62.2)

17.8
(64)

16.9
(62.4)

14.8
(58.6)

12.2
(54)

9.3
(48.7)

7.9
(46.2)

9.3
(48.7)

10.1
(50.2)

11.5
(52.7)

12.4
(54.3)

14.9
(58.8)

12.83
(55.07)

Precipitation mm (inches)

2
(0.08)

2
(0.08)

0
(0)

0
(0)

0
(0)

0
(0)

0
(0)

0
(0)

0
(0)

0
(0)

0
(0)

0
(0)

4
(0.16)

Source: Climate-data.org

An important element of the climate at the coast of Peru, is that the sea water never gets tropically warm due to the Humboldt current, while during long periods of the year the weather does not get very hot either, as the sky is overcast with a deck of clouds from which it rarely rains.