May Weather in Ilo, Peru

Last updated: August 27, 2025

In May, the average temperature in Ilo, Peru sits pleasantly at 17°C (63°F), with a comfortable range that fluctuates between a minimum of 14°C (58°F) and a maximum of 22°C (72°F). Expect minimal rainfall during this time, with only 3 mm (0.1 in) of precipitation over 0 days. The air humidity is relatively high at 88%, creating a soothing yet vibrant atmosphere for your visit.

May Temperature in Ilo

In May in Ilo, the average temperature is 17°C (63°F). The maximum can reach 22°C (72°F), and the minimum can be as low as 14°C (58°F). This pleasant weather makes it an ideal time for travelers to explore the outdoors and enjoy various activities.

May Weather in Ilo: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Ilo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ilo, May typically has an average temperature of 17°C (63°F), with highs reaching up to 22°C (72°F) and lows dropping to around 14°C (58°F).

Data source: Temperature data for Ilo generated using information from the Copernicus Climate Change Service.

May Precipitation in Ilo

In Ilo in May, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

May Precipitation Trends in Ilo

The chart displays monthly precipitation patterns in Ilo, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Ilo, May typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Ilo

In Ilo in May, humidity is 88%. With an average temperature of 17°C (63°F), this humidity feels like a thick blanket enveloping you, making outdoor activities feel stifling and sticky, potentially dampening the joy of exploration and requiring frequent breaks for hydration.

May Average Humidity in Ilo

This chart illustrates the average monthly humidity levels in Ilo, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Ilo is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Ilo

In Ilo in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Ilo.

Maximum UV Index Levels in Ilo for May

The chart shows the monthly maximum UV Index (UVI) for Ilo in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Ilo typically reaches 10, which falls under the very high exposure category.

Data source: Ilo May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How May Weather in Ilo Compares to Other Months

Weather in Ilo varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Ilo, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Ilo, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (69°F)	10 mm (0.4 inches)	89%	extreme
February Weather	21°C (70°F)	8 mm (0.3 inches)	90%	extreme
March Weather	20°C (69°F)	4 mm (0.1 inches)	90%	extreme
April Weather	18°C (66°F)	2 mm (0.1 inches)	91%	extreme
May Weather	17°C (63°F)	3 mm (0.1 inches)	88%	very high
June Weather	16°C (61°F)	5 mm (0.2 inches)	76%	very high
July Weather	15°C (59°F)	8 mm (0.3 inches)	61%	very high
August Weather	15°C (59°F)	7 mm (0.3 inches)	57%	extreme
September Weather	15°C (59°F)	7 mm (0.3 inches)	58%	extreme
October Weather	16°C (61°F)	5 mm (0.2 inches)	75%	extreme
November Weather	17°C (63°F)	4 mm (0.2 inches)	83%	extreme
December Weather	19°C (66°F)	6 mm (0.2 inches)	84%	extreme