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May Weather in Chaves, Portugal

Last updated: August 27, 2025

In Chaves, Portugal, the average temperature in May is a mild 15°C (59°F). Temperatures can range from a cool 1°C (35°F) to a warm 31°C (88°F), offering varied weather experiences. Expect precipitation of around 49 mm (1.9 in) over approximately 8 days, contributing to an average humidity of 78% for a tropical feel.

May Temperature in Chaves

In May in Chaves, the average temperature is 15°C (59°F). The maximum can reach 31°C (88°F), while the minimum can dip as low as 1°C (35°F). This means travelers should be prepared for a wide range of temperatures, so packing layers is advisable.

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

The chart illustrates May temperature patterns in Chaves, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chaves, May typically has an average temperature of 15°C (59°F), with highs reaching up to 31°C (88°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec424648525964696964574845
Data source: Temperature data for Chaves 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 Chaves

In Chaves in May, the precipitation amount is 49 mm (1.9 in) spread over 8 days.

May Precipitation Trends in Chaves

The chart displays monthly precipitation patterns in Chaves, 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 Chaves, May typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4387909049391915307180114
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Chaves

In Chaves in May, humidity is 78%. With an average temperature of 15°C (59°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities a bit more tiring and requiring frequent breaks for hydration as you explore the area.

May Average Humidity in Chaves

This chart illustrates the average monthly humidity levels in Chaves, 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 Chaves is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%81%78%79%78%71%63%64%71%79%86%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Chaves

In Chaves 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 Chaves.

Maximum UV Index Levels in Chaves for May

The chart shows the monthly maximum UV Index (UVI) for Chaves 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 Chaves typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246910111098642
Data source: Chaves 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 Chaves Compares to Other Months

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

This table compares monthly weather conditions in Chaves, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)43 mm (1.7 inches)87%low
February Weather8°C (46°F)87 mm (3.4 inches)81%moderate
March Weather9°C (48°F)90 mm (3.5 inches)78%high
April Weather11°C (52°F)90 mm (3.5 inches)79%very high
May Weather15°C (59°F)49 mm (1.9 inches)78%very high
June Weather18°C (64°F)39 mm (1.5 inches)71%extreme
July Weather21°C (69°F)19 mm (0.8 inches)63%very high
August Weather20°C (69°F)15 mm (0.6 inches)64%very high
September Weather18°C (65°F)30 mm (1.2 inches)71%very high
October Weather14°C (57°F)71 mm (2.8 inches)79%high
November Weather9°C (48°F)80 mm (3.2 inches)86%moderate
December Weather7°C (45°F)114 mm (4.5 inches)87%low

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