May Weather in Rosario, Peru

Last updated: August 27, 2025

In May, the average temperature in Rosario, Peru hovers around 15°C (60°F), perfect for enjoying the outdoors. Expect a minimum of 5°C (42°F) and a cozy maximum of 24°C (76°F). However, don't forget your umbrella, as 105 mm (4.1 in) of precipitation can be expected over 14 days. With an average humidity level of 85%, it’s sure to feel a bit muggy, adding to the region's unique charm.

May Temperature in Rosario

In May in Rosario, the average temperature is 15°C (60°F). The maximum can reach 24°C (76°F), while the minimum can dip as low as 5°C (42°F). This pleasant climate makes Rosario an ideal destination for travelers seeking mild weather and outdoor adventures.

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

The chart illustrates May temperature patterns in Rosario, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosario, May typically has an average temperature of 15°C (60°F), with highs reaching up to 24°C (76°F) and lows dropping to around 5°C (42°F).

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

May Precipitation in Rosario

In Rosario in May, the precipitation amount is 105 mm (4.1 in) over the course of 14 days.

May Precipitation Trends in Rosario

The chart displays monthly precipitation patterns in Rosario, 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 Rosario, May typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Rosario

In Rosario in May, humidity is 85%. With an average temperature of 15°C (60°F), this humidity feels like a warm, sticky embrace, making outdoor activities somewhat uncomfortable for travelers who may find themselves constantly seeking shade and hydration.

May Average Humidity in Rosario

This chart illustrates the average monthly humidity levels in Rosario, 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 Rosario is approximately 85%, 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 Rosario

In Rosario in May, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Rosario.

Maximum UV Index Levels in Rosario for May

The chart shows the monthly maximum UV Index (UVI) for Rosario 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 Rosario typically reaches 13, which falls under the extreme exposure category.

Data source: Rosario 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 Rosario Compares to Other Months

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

This table compares monthly weather conditions in Rosario, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (61°F)	408 mm (16.0 inches)	93%	extreme
February Weather	16°C (61°F)	401 mm (15.8 inches)	92%	extreme
March Weather	16°C (61°F)	465 mm (18.3 inches)	92%	extreme
April Weather	16°C (61°F)	282 mm (11.1 inches)	90%	extreme
May Weather	15°C (60°F)	105 mm (4.1 inches)	85%	extreme
June Weather	15°C (59°F)	40 mm (1.6 inches)	70%	extreme
July Weather	14°C (58°F)	27 mm (1.1 inches)	54%	extreme
August Weather	15°C (58°F)	64 mm (2.5 inches)	44%	extreme
September Weather	15°C (60°F)	189 mm (7.5 inches)	52%	extreme
October Weather	16°C (61°F)	299 mm (11.8 inches)	65%	extreme
November Weather	16°C (62°F)	325 mm (12.8 inches)	81%	extreme
December Weather	16°C (62°F)	325 mm (12.8 inches)	89%	extreme