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May Weather in Portugalete, Spain

Last updated: August 27, 2025

In May, the average temperature in Portugalete, Spain hovers around 14°C (58°F), offering a pleasant climate for various activities. Expect temperatures to range from a minimum of 5°C (41°F) to a maximum of 26°C (80°F). However, be prepared for some rain, as the region receives an average of 82 mm (3.2 in) of precipitation over about 15 days. With an average humidity level of 81%, you'll definitely feel the freshness in the air!

May Temperature in Portugalete

In May in Portugalete, the average temperature is 14°C (58°F). Maximum temperatures can reach 26°C (80°F), while minimums can drop to as low as 5°C (41°F). This makes it an ideal time for travelers seeking mild weather and the opportunity for outdoor activities.

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

The chart illustrates May temperature patterns in Portugalete, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portugalete, May typically has an average temperature of 14°C (58°F), with highs reaching up to 26°C (80°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec465051545863666764595350
Data source: Temperature data for Portugalete generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Portugalete

In Portugalete in May, the precipitation amount is 82 mm (3.2 in) over the course of 15 days.

May Precipitation Trends in Portugalete

The chart displays monthly precipitation patterns in Portugalete, 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 Portugalete, May typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec117103989282104656281105158154
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Portugalete

In Portugalete in May, humidity is 81%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor adventures sticky and challenging, while also providing a lush, vibrant atmosphere perfect for exploring.

May Average Humidity in Portugalete

This chart illustrates the average monthly humidity levels in Portugalete, 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 Portugalete is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%83%82%81%81%83%87%82%77%80%83%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Portugalete

In Portugalete 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 Portugalete.

Maximum UV Index Levels in Portugalete for May

The chart shows the monthly maximum UV Index (UVI) for Portugalete 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 Portugalete typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Portugalete 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 Portugalete Compares to Other Months

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

This table compares monthly weather conditions in Portugalete, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)117 mm (4.6 inches)85%low
February Weather10°C (50°F)103 mm (4.0 inches)83%moderate
March Weather10°C (51°F)98 mm (3.9 inches)82%high
April Weather12°C (54°F)92 mm (3.6 inches)81%high
May Weather14°C (58°F)82 mm (3.2 inches)81%very high
June Weather17°C (63°F)103 mm (4.1 inches)83%very high
July Weather19°C (67°F)65 mm (2.6 inches)87%very high
August Weather20°C (67°F)62 mm (2.5 inches)82%very high
September Weather18°C (65°F)81 mm (3.2 inches)77%high
October Weather15°C (59°F)105 mm (4.1 inches)80%moderate
November Weather11°C (53°F)158 mm (6.2 inches)83%moderate
December Weather10°C (50°F)154 mm (6.1 inches)85%low

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