May Weather in Arcos, Portugal

Last updated: August 27, 2025

In May, the average temperature in Arcos, Portugal hovers around 16°C (62°F). Conditions can vary, with minimums dropping to 7°C (44°F) and maximums reaching a warm 30°C (86°F). Expect about 85 mm (3.4 in) of precipitation spread over 9 days, contributing to a humidity level of 78%. Whether you're exploring the outdoors or indulging in local culture, be prepared for a mix of weather!

May Temperature in Arcos

In May in Arcos, the average temperature is 16°C (62°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop to as low as 7°C (44°F). This makes Arcos an ideal destination for travelers looking to enjoy a mild climate with the possibility of warm days and cooler evenings.

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

The chart illustrates May temperature patterns in Arcos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arcos, May typically has an average temperature of 16°C (62°F), with highs reaching up to 30°C (86°F) and lows dropping to around 7°C (44°F).

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

May Precipitation in Arcos

In Arcos in May, the total precipitation amount is 85 mm (3.4 in) recorded over a span of 9 days.

May Precipitation Trends in Arcos

The chart displays monthly precipitation patterns in Arcos, 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 Arcos, May typically receives around 85 mm (3.4 inches) of precipitation spread over approximately 9 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 Arcos

In Arcos in May, humidity is 78%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities enjoyable yet slightly sticky. Travelers may find the weather pleasantly mild, though they'll appreciate having light, breathable clothing on hand to stay comfortable while exploring.

May Average Humidity in Arcos

This chart illustrates the average monthly humidity levels in Arcos, 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 Arcos is approximately 78%, 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 Arcos

In Arcos in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Arcos.

Maximum UV Index Levels in Arcos for May

The chart shows the monthly maximum UV Index (UVI) for Arcos 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 Arcos typically reaches 9, which falls under the very high exposure category.

Data source: Arcos 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 Arcos Compares to Other Months

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

This table compares monthly weather conditions in Arcos, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	103 mm (4.0 inches)	87%	low
February Weather	11°C (53°F)	142 mm (5.6 inches)	81%	moderate
March Weather	12°C (54°F)	150 mm (5.9 inches)	78%	high
April Weather	14°C (57°F)	147 mm (5.8 inches)	79%	very high
May Weather	16°C (62°F)	85 mm (3.4 inches)	78%	very high
June Weather	18°C (64°F)	44 mm (1.7 inches)	71%	very high
July Weather	20°C (68°F)	19 mm (0.7 inches)	63%	very high
August Weather	20°C (68°F)	21 mm (0.8 inches)	64%	very high
September Weather	19°C (67°F)	39 mm (1.5 inches)	71%	high
October Weather	16°C (62°F)	131 mm (5.2 inches)	79%	high
November Weather	13°C (56°F)	175 mm (6.9 inches)	86%	moderate
December Weather	12°C (53°F)	190 mm (7.5 inches)	87%	low