May Weather in Sion, Peru

Last updated: August 27, 2025

In Sion, Peru, the average temperature in May hovers around 23°C (73°F). Expect a minimum of 16°C (61°F) and a maximum of 32°C (90°F) during this time. However, be prepared for frequent rain, as the area receives a notable 186 mm (7.3 in) of precipitation over 24 days. With an average humidity of 86%, don't forget your umbrella and stay hydrated!

May Temperature in Sion

In May in Sion, the average temperature is 23°C (73°F). Maximums can reach 32°C (90°F) while minimums can drop to 16°C (61°F). This pleasant climate makes it an ideal destination for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates May temperature patterns in Sion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sion, May typically has an average temperature of 23°C (73°F), with highs reaching up to 32°C (90°F) and lows dropping to around 16°C (61°F).

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

May Precipitation in Sion

In Sion in May, the total precipitation amount is 186 mm (7.3 in) distributed over 24 days.

May Precipitation Trends in Sion

The chart displays monthly precipitation patterns in Sion, 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 Sion, May typically receives around 186 mm (7.3 inches) of precipitation spread over approximately 24 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 Sion

In Sion in May humidity is 86%. With an average temperature of 23°C (73°F), this humidity feels like a warm, enveloping blanket that makes traveling feel both sticky and heavy, often requiring frequent breaks to hydrate and seek shade.

May Average Humidity in Sion

This chart illustrates the average monthly humidity levels in Sion, 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 Sion is approximately 86%, 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 Sion

In Sion in May, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Sion, you can check here.

Maximum UV Index Levels in Sion for May

The chart shows the monthly maximum UV Index (UVI) for Sion 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 Sion typically reaches 14, which falls under the extreme exposure category.

Data source: Sion 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 Sion Compares to Other Months

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

This table compares monthly weather conditions in Sion, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	284 mm (11.2 inches)	80%	extreme
February Weather	23°C (74°F)	246 mm (9.7 inches)	76%	extreme
March Weather	23°C (73°F)	296 mm (11.7 inches)	81%	extreme
April Weather	23°C (74°F)	202 mm (7.9 inches)	86%	extreme
May Weather	23°C (73°F)	186 mm (7.3 inches)	86%	extreme
June Weather	23°C (73°F)	112 mm (4.4 inches)	70%	extreme
July Weather	22°C (72°F)	74 mm (2.9 inches)	47%	extreme
August Weather	23°C (74°F)	56 mm (2.2 inches)	37%	extreme
September Weather	24°C (76°F)	48 mm (1.9 inches)	42%	extreme
October Weather	24°C (76°F)	170 mm (6.7 inches)	62%	extreme
November Weather	24°C (75°F)	254 mm (10.0 inches)	76%	extreme
December Weather	23°C (74°F)	296 mm (11.7 inches)	89%	extreme