nomadseason

May Weather in Castelo Branco, Portugal

Last updated: August 27, 2025

In May, the average temperature in Castelo Branco, Portugal hovers around 17°C (62°F), with a minimum dipping to 12°C (53°F) and a maximum rising to 20°C (67°F). During this month, expect approximately 63 mm (2.5 in) of precipitation spread across about 11 days, coupled with an average humidity level of 83%. Make sure to pack accordingly for the varied weather!

May Temperature in Castelo Branco

In May in Castelo Branco, the average temperature is 17°C (62°F). Maximums can reach 20°C (67°F), and minimums can be as low as 12°C (53°F). This pleasant climate makes Castelo Branco an ideal destination for travelers seeking mild weather and outdoor activities.

May Weather in Castelo Branco: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Castelo Branco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelo Branco, May typically has an average temperature of 17°C (62°F), with highs reaching up to 20°C (67°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec615959606266707272696563
Data source: Temperature data for Castelo Branco generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Castelo Branco

In Castelo Branco in May, the precipitation amount is 63 mm (2.5 in) during a total of 11 days.

May Precipitation Trends in Castelo Branco

The chart displays monthly precipitation patterns in Castelo Branco, 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 Castelo Branco, May typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec91796375633827585774124108
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Castelo Branco

In Castelo Branco in May, humidity is 83%. With an average temperature of 17°C (62°F), this humidity feels like traveling through a thick blanket of warmth, making every step feel heavy and inviting frequent breaks to cool down and hydrate.

May Average Humidity in Castelo Branco

This chart illustrates the average monthly humidity levels in Castelo Branco, 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 Castelo Branco is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%85%85%83%85%86%83%83%79%80%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Castelo Branco

In Castelo Branco 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 Castelo Branco.

Maximum UV Index Levels in Castelo Branco for May

The chart shows the monthly maximum UV Index (UVI) for Castelo Branco 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 Castelo Branco typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109743
Data source: Castelo Branco 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 Castelo Branco Compares to Other Months

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

This table compares monthly weather conditions in Castelo Branco, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)90 mm (3.6 inches)84%moderate
February Weather15°C (59°F)79 mm (3.1 inches)83%moderate
March Weather15°C (60°F)63 mm (2.5 inches)85%high
April Weather15°C (60°F)75 mm (3.0 inches)85%very high
May Weather17°C (62°F)63 mm (2.5 inches)83%very high
June Weather19°C (66°F)38 mm (1.5 inches)85%extreme
July Weather21°C (70°F)27 mm (1.1 inches)86%very high
August Weather22°C (73°F)58 mm (2.3 inches)83%very high
September Weather22°C (72°F)57 mm (2.2 inches)83%very high
October Weather20°C (69°F)74 mm (2.9 inches)79%high
November Weather18°C (65°F)124 mm (4.9 inches)80%moderate
December Weather17°C (63°F)108 mm (4.3 inches)85%moderate

Compare Castelo Branco's Climate with Cities Worldwide