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May Weather in Portalegre, Portugal

Last updated: August 27, 2025

In May, the average temperature in Portalegre, Portugal hovers around 19°C (66°F). Expect a comfortable range, with minimums dipping to 5°C (40°F) and maximums soaring to 34°C (94°F). However, be prepared for some rain, as the area receives about 41 mm (1.6 in) of precipitation over 5 days. With an average humidity level of 70%, the weather can feel quite humid!

May Temperature in Portalegre

In May in Portalegre, the average temperature is 19°C (66°F). The maximum can reach 34°C (94°F), while the minimum can dip as low as 5°C (40°F). This makes it an ideal time for travelers seeking to enjoy a variety of outdoor activities while experiencing a comfortable climate.

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

The chart illustrates May temperature patterns in Portalegre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portalegre, May typically has an average temperature of 19°C (66°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec475254576570757772645450
Data source: Temperature data for Portalegre 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 Portalegre

In Portalegre in May, the precipitation amount is 41 mm (1.6 in) over a period of 5 days.

May Precipitation Trends in Portalegre

The chart displays monthly precipitation patterns in Portalegre, 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 Portalegre, May typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec3752938741144731538075
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Portalegre

In Portalegre in May humidity is 70%. With an average temperature of 19°C (66°F), this humidity feels like a warm blanket enveloping you, making travel a bit sticky and prompting frequent breaks for water as you explore the sights.

May Average Humidity in Portalegre

This chart illustrates the average monthly humidity levels in Portalegre, 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 Portalegre is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%75%72%70%70%63%60%60%68%74%83%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Portalegre

In Portalegre 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 Portalegre.

Maximum UV Index Levels in Portalegre for May

The chart shows the monthly maximum UV Index (UVI) for Portalegre 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 Portalegre typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3469101110108643
Data source: Portalegre 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 Portalegre Compares to Other Months

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

This table compares monthly weather conditions in Portalegre, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)37 mm (1.4 inches)85%moderate
February Weather11°C (52°F)51 mm (2.0 inches)75%moderate
March Weather12°C (54°F)93 mm (3.6 inches)72%high
April Weather14°C (58°F)87 mm (3.4 inches)70%very high
May Weather19°C (66°F)41 mm (1.6 inches)70%very high
June Weather21°C (70°F)14 mm (0.6 inches)63%extreme
July Weather24°C (76°F)4 mm (0.2 inches)60%very high
August Weather25°C (77°F)7 mm (0.3 inches)60%very high
September Weather22°C (73°F)31 mm (1.2 inches)67%very high
October Weather18°C (65°F)53 mm (2.1 inches)74%high
November Weather12°C (54°F)80 mm (3.2 inches)83%moderate
December Weather10°C (50°F)75 mm (3.0 inches)85%moderate

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