May Weather in Seixal, Portugal

Last updated: August 27, 2025

In May, the average temperature in Seixal, Portugal hovers around 17°C (62°F), with a comfortable range where the minimum dips to 12°C (53°F) and the maximum peaks at 26°C (78°F). Expect about 23 mm (0.9 in) of precipitation spread over 6 days, contributing to an average humidity of 77%. Perfect weather for enjoying the local scenery!

May Temperature in Seixal

In May in Seixal, the average temperature is 17°C (62°F), with maximums reaching 26°C (78°F) and minimums dipping as low as 12°C (53°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates May temperature patterns in Seixal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seixal, May typically has an average temperature of 17°C (62°F), with highs reaching up to 26°C (78°F) and lows dropping to around 12°C (53°F).

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

May Precipitation in Seixal

In Seixal in May, the precipitation amount is 23 mm (0.9 in) spread over 6 days.

May Precipitation Trends in Seixal

The chart displays monthly precipitation patterns in Seixal, 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 Seixal, May typically receives around 23 mm (0.9 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 Seixal

In Seixal in May humidity is 77%. With an average temperature of 17°C (62°F), this humidity feels like a warm embrace, creating a lush, almost tropical atmosphere that can be quite stifling for traveling, making it essential to stay hydrated and take frequent breaks in the shade.

May Average Humidity in Seixal

This chart illustrates the average monthly humidity levels in Seixal, 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 Seixal is approximately 77%, 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 Seixal

In Seixal in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Seixal.

Maximum UV Index Levels in Seixal for May

The chart shows the monthly maximum UV Index (UVI) for Seixal 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 Seixal typically reaches 11, which falls under the extreme exposure category.

Data source: Seixal 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 Seixal Compares to Other Months

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

This table compares monthly weather conditions in Seixal, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (59°F)	38 mm (1.5 inches)	75%	moderate
February Weather	14°C (58°F)	60 mm (2.4 inches)	75%	high
March Weather	14°C (58°F)	52 mm (2.1 inches)	78%	very high
April Weather	15°C (60°F)	56 mm (2.2 inches)	78%	very high
May Weather	17°C (62°F)	23 mm (0.9 inches)	77%	extreme
June Weather	18°C (65°F)	36 mm (1.4 inches)	80%	extreme
July Weather	20°C (68°F)	7 mm (0.3 inches)	83%	extreme
August Weather	21°C (71°F)	8 mm (0.3 inches)	83%	extreme
September Weather	21°C (70°F)	18 mm (0.7 inches)	81%	very high
October Weather	20°C (67°F)	57 mm (2.3 inches)	80%	very high
November Weather	17°C (63°F)	67 mm (2.6 inches)	75%	high
December Weather	16°C (61°F)	58 mm (2.3 inches)	75%	moderate