Map from Google - Chiclayo

In Chiclayo, the fourth largest city in Peru, the climate is subtropical arid, with a hot season from January to April, and a relatively cool season from June to November.
Chiclayo is located in the northern part of the Peruvian coast (or better, a short distance from the coast), in the region of Lambayeque, and despite the position, about 6 degrees south of the equator, the climate is arid, and relatively cool in winter, because of the cold marine current, known as Humboldt current.
The landscape in the region is virtually desert, except in areas where the rivers flowing from the Andes are used to irrigate fields; to find somewhat green areas, you have to go to the east, at the foot of the Andes, where there are nature reserves, such as the Refugio de Vida Silvestre Laquipampa, where the altitude ranges from 300 metres (1,000 feet) in the south to almost 3,000 metres (10,000 feet) in the northern part; the Bosque Moyan - Palacio, where it goes from 350 metres (1,100 feet) to nearly 1,800 metres (6,000 feet); and the Reserva Ecologica Chaparri, more arid, near the city, and whose altitude reaches nearly 1,400 metres (4,600 ft). In the northeastern part of the Lambayeque region, we are now in the Andean zone: Incahuasi is located at 3,000 metres (10,000 feet) above sea level.
Near the city are the archaeological complexes of Túcume, where there are 250 decaying brick pyramids, and Sipán.
On the coast there are seaside resorts such as Puerto Eten and Pimentel, where you can swim and surf.
Here are the average temperatures.
Average temperatures - Chiclayo
ChiclayoJanFebMarAprMayJunJulAugSepOctNovDec
ChiclayoJFMAMJJASOND
Min (°C)192020191817161515161618
Max (°C)293030292725242324242527
Min (°F)666868666463615959616164
Max (°F)848686848177757375757781

The rains are generally very poor, as they are lower than 100 millimetres (4 inches) per year, but from January to April, rare rains occur, which in the years of El Niño, the phenomenon of an abnormal warming in the Pacific Ocean to the west of South America, may become more abundant, though not as intense as in Tumbes (which is located in the northernmost part of Peru, and during the El Niño years turns into a city with a tropical climate).
In the most intense periods of El Niño, however, rainfall increases, as well as temperature: highs from January to April or even May can often reach 33/34 °C (91/93 °F), with peaks of 35/36 °C (95/97 °F). And as for the rains, for example, in 1983, 320 mm (13 in) of rain fell in January, of which 120 mm (4.7 inches, and 95 mm or 3.7 inches in a single day), almost no rain in February, 85 mm (3.3 in) in March and 90 mm (3.5 in) in April. In 1998 precipitation amounted to 70 mm (2.8 in) in January, 200 mm (8 inches, of which 115 mm or 4.5 inches in one day) in February, 145 mm (5.7 in) in March and 30 mm (1.2 in) April, for a total of 455 mm (18 in) in one year. Although they are rare, heavy rains, when they are concentrated in a few hours, are dangerous and can cause flooding.
Here is the average precipitation.
Average precipitation - Chiclayo
ChiclayoJanFebMarAprMayJunJulAugSepOctNovDecYear
ChiclayoJFMAMJJASONDY
Prec. (mm)62941000112027
Prec. (in)0.20.10.40.20000000.101.1
Days24310000000010

The amount of sunshine in Chiclayo is generally good, although it is never excellent, as the Humboldt current can cause low clouds and fog, especially during the cool season, from July to September, though less than in Lima. Throughout the year, there are about 6/7 hours of sunshine per day.

Chiclayo, square and cathedral

The sea in Chiclayo normally is not very warm: it is warm enough for swimming in February and March, while it is very cool (but not impossible for swimming) from July to November, when it drops to 18/19 °C (64/66 °F). In the Niño years, the sea in this area warms up a lot, so much so that it can reach 29 °C (84 °F) in the early months of the year.
Sea temperature - Chiclayo
ChiclayoJanFebMarAprMayJunJulAugSepOctNovDec
ChiclayoJFMAMJJASOND
Sea (°C)222423222120191818181921
Sea (°F)727573727068666464646670