May Weather in Portel, Portugal

Last updated: August 27, 2025

In May, the average temperature in Portel, Portugal is a comfortable 20°C (67°F). Expect a minimum of 6°C (42°F) and a maximum of 35°C (95°F), making it a month of diverse weather experiences. You'll encounter an average precipitation of 29 mm (1.1 in) spread over about 5 days and a moderate humidity level of 70%. Embrace the variety that this month brings!

May Temperature in Portel

In May in Portel, the average temperature is 20°C (67°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 6°C (42°F). This makes it a great time to visit Portel as you can enjoy warm days and cool evenings.

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

The chart illustrates May temperature patterns in Portel, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portel, May typically has an average temperature of 20°C (67°F), with highs reaching up to 35°C (95°F) and lows dropping to around 6°C (42°F).

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

May Precipitation in Portel

In Portel in May, the total precipitation amount is 29 mm (1.1 in) recorded over a span of 5 days.

May Precipitation Trends in Portel

The chart displays monthly precipitation patterns in Portel, 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 Portel, May typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 5 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 Portel

In Portel in May humidity is 70%. With an average temperature of 20°C (67°F), this humidity feels like a warm embrace that clings to your skin, making outdoor activities both refreshing and slightly uncomfortable, as the moisture in the air adds an extra layer of heaviness, causing you to seek shade more often while still enjoying the vibrant atmosphere of the destination.

May Average Humidity in Portel

This chart illustrates the average monthly humidity levels in Portel, 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 Portel 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 Portel

In Portel 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 Portel.

Maximum UV Index Levels in Portel for May

The chart shows the monthly maximum UV Index (UVI) for Portel 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 Portel typically reaches 10, which falls under the very high exposure category.

Data source: Portel 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 Portel Compares to Other Months

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

This table compares monthly weather conditions in Portel, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	29 mm (1.1 inches)	85%	moderate
February Weather	12°C (53°F)	44 mm (1.7 inches)	75%	moderate
March Weather	13°C (56°F)	87 mm (3.4 inches)	72%	high
April Weather	15°C (60°F)	66 mm (2.6 inches)	70%	very high
May Weather	20°C (67°F)	29 mm (1.1 inches)	70%	very high
June Weather	22°C (72°F)	9 mm (0.4 inches)	63%	extreme
July Weather	25°C (76°F)	2 mm (0.1 inches)	60%	very high
August Weather	26°C (78°F)	2 mm (0.1 inches)	60%	very high
September Weather	23°C (74°F)	23 mm (0.9 inches)	67%	very high
October Weather	19°C (67°F)	45 mm (1.8 inches)	74%	high
November Weather	13°C (57°F)	56 mm (2.2 inches)	83%	moderate
December Weather	11°C (52°F)	52 mm (2.0 inches)	85%	moderate