May Weather in Sao Martinho do Porto, Portugal

Last updated: August 27, 2025

In May, the average temperature in Sao Martinho do Porto, Portugal hovers around 17°C (63°F), with a comfortable range fluctuating between a cool 11°C (51°F) and a warm 30°C (87°F). Expect some rain, as precipitation totals approximately 39 mm (1.5 in) over 6 days, bringing an average humidity of 70% for a pleasantly balmy atmosphere.

May Temperature in Sao Martinho do Porto

In May in Sao Martinho do Porto, the average temperature is 17°C (63°F). Maximums can reach 30°C (87°F) and minimums can be as low as 11°C (51°F). This makes Sao Martinho do Porto a comfortable destination for travelers looking to enjoy mild weather.

May Weather in Sao Martinho do Porto: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Sao Martinho do Porto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sao Martinho do Porto, May typically has an average temperature of 17°C (63°F), with highs reaching up to 30°C (87°F) and lows dropping to around 11°C (51°F).

Data source: Temperature data for Sao Martinho do Porto generated using information from the Copernicus Climate Change Service.

May Precipitation in Sao Martinho do Porto

In Sao Martinho do Porto in May, the precipitation amount is 39 mm (1.5 in), occurring over the course of 6 days.

May Precipitation Trends in Sao Martinho do Porto

The chart displays monthly precipitation patterns in Sao Martinho do Porto, 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 Sao Martinho do Porto, May typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 6 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 Sao Martinho do Porto

In Sao Martinho do Porto in May humidity is 70%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making travel both refreshing and slightly sticky, as you navigate the air thick with moisture.

May Average Humidity in Sao Martinho do Porto

This chart illustrates the average monthly humidity levels in Sao Martinho do Porto, 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 Sao Martinho do Porto is approximately 70%, 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 Sao Martinho do Porto

In Sao Martinho do Porto 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 Sao Martinho do Porto.

Maximum UV Index Levels in Sao Martinho do Porto for May

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

Data source: Sao Martinho do Porto 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 Sao Martinho do Porto Compares to Other Months

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

This table compares monthly weather conditions in Sao Martinho do Porto, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	50 mm (2.0 inches)	85%	moderate
February Weather	13°C (56°F)	55 mm (2.1 inches)	75%	moderate
March Weather	13°C (57°F)	73 mm (2.9 inches)	72%	high
April Weather	15°C (59°F)	80 mm (3.1 inches)	70%	very high
May Weather	17°C (63°F)	39 mm (1.5 inches)	70%	very high
June Weather	18°C (65°F)	24 mm (1.0 inches)	63%	extreme
July Weather	19°C (67°F)	12 mm (0.5 inches)	60%	very high
August Weather	20°C (68°F)	7 mm (0.3 inches)	60%	very high
September Weather	19°C (67°F)	24 mm (1.0 inches)	67%	very high
October Weather	18°C (64°F)	69 mm (2.7 inches)	74%	high
November Weather	15°C (59°F)	91 mm (3.6 inches)	83%	moderate
December Weather	13°C (56°F)	73 mm (2.9 inches)	85%	moderate