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Monthly climate in Ilo, Peru

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ilo features a hot desert climate (BWh). Temperatures typically range between 15 °C (59 °F) and 21 °C (70 °F) through the year, but rarely can drop to 12 °C (54 °F) or can rise to as high as 25 °C (76 °F). The average annual precipitation amounts to about 70 mm (2.8 inches) and receives 4 rainy days on the 1 mm (0.04 inches) threshold annually. Ilo enjoys an average of 3964 hours of sunshine throughout the year, and daylight varies from 11 hours 4 minutes to 13 hours 9 minutes per day.

Monthly average temperatures in Ilo, Peru

The warmest months in Ilo are January, February and March, with daily mean temperatures ranging from 20 to 21 °C (69 - 70 °F) throughout the day. The coldest temperatures usually occur in July, August and September, when daily mean temperatures range from 15 to 15 °C (59 - 59 °F) throughout the day. On average each year, Ilo experiences 0 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ilo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum24°C
(76°F)		25°C
(76°F)		24°C
(76°F)		22°C
(72°F)		22°C
(72°F)		20°C
(69°F)		23°C
(73°F)		18°C
(65°F)		18°C
(65°F)		21°C
(69°F)		20°C
(69°F)		22°C
(71°F)
Mean maximum23°C
(73°F)		23°C
(74°F)		23°C
(73°F)		21°C
(70°F)		20°C
(69°F)		19°C
(66°F)		19°C
(66°F)		18°C
(64°F)		18°C
(64°F)		19°C
(66°F)		20°C
(68°F)		21°C
(71°F)
Average high22°C
(71°F)		22°C
(72°F)		22°C
(71°F)		20°C
(68°F)		19°C
(67°F)		18°C
(64°F)		17°C
(62°F)		16°C
(62°F)		16°C
(62°F)		17°C
(63°F)		18°C
(66°F)		20°C
(69°F)
Daily mean20°C
(69°F)		21°C
(70°F)		20°C
(69°F)		18°C
(66°F)		17°C
(63°F)		16°C
(61°F)		15°C
(59°F)		15°C
(59°F)		15°C
(59°F)		16°C
(61°F)		17°C
(63°F)		19°C
(66°F)
Average low19°C
(67°F)		20°C
(68°F)		19°C
(67°F)		17°C
(63°F)		16°C
(61°F)		15°C
(59°F)		14°C
(57°F)		13°C
(56°F)		13°C
(57°F)		14°C
(58°F)		16°C
(61°F)		18°C
(64°F)
Mean minimum18°C
(66°F)		19°C
(66°F)		18°C
(64°F)		16°C
(61°F)		15°C
(59°F)		14°C
(57°F)		13°C
(55°F)		13°C
(55°F)		12°C
(55°F)		14°C
(57°F)		15°C
(59°F)		17°C
(62°F)
Minimum17°C
(63°F)		17°C
(63°F)		14°C
(58°F)		14°C
(57°F)		14°C
(58°F)		12°C
(54°F)		12°C
(54°F)		12°C
(54°F)		12°C
(54°F)		13°C
(55°F)		14°C
(57°F)		16°C
(61°F)

Compare climate in Ilo with other places

Compare temperature, precipitation, sunshine, UV index in Ilo, Peru with other places around the world.

Monthly average precipitation in Ilo, Peru

Ilo usually has the most precipitation in January, February and July, with an average of 1 rainy days and 9 mm (0.3 inches) of precipitation per month. The driest months in Ilo are March, April and May. On average, 3 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ilo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)10 (0.4)8 (0.3)4 (0.1)2 (0.1)3 (0.1)5 (0.2)8 (0.3)7 (0.3)7 (0.3)5 (0.2)4 (0.2)6 (0.2)
Average precipitation days (≥ 1 mm)220000000000

Monthly sunshine hours in Ilo, Peru

The sunniest months in Ilo are October, November and December, when the sun shines an average of 11 hours 44 minutes a day. Least sunny months in Ilo: January, February and June receive an average of 9 hours 56 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ilo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours278306338324327309325335336359357364
Mean daily daylight hours13h 2m12h 38m12h 9m11h 40m11h 15m11h 4m11h 10m11h 31m11h 59m12h 29m12h 55m13h 9m

Solar UV radiation in Ilo, Peru

Ilo experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 15 - 15, which corresponds to the Extreme category of sun exposure. May, June and July are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly Ilo UV Index data.

Average daily maximum UV levels by month for Ilo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)1515141310891113151515