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August Weather in Castelo Branco, Portugal

Last updated: August 27, 2025

In Castelo Branco, Portugal during August, the average temperature is a pleasant 25°C (78°F). However, temperatures can swing, with a minimum of 12°C (54°F) and a scorching maximum of 43°C (110°F). Expect a little moisture in the air, with an average humidity of 60%, and just 3 mm (0.1 in) of precipitation expected over 1 day.

August Temperature in Castelo Branco

In August in Castelo Branco, the average temperature is 25°C (78°F). Maximum can reach 43°C (110°F) and minimum can be as low as 12°C (54°F). This wide range makes it essential for travelers to pack both light clothing for the heat and warmer layers for cooler evenings.

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

The chart illustrates August 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, August typically has an average temperature of 25°C (78°F), with highs reaching up to 43°C (110°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec465154586671777773645450
Data source: Temperature data for Castelo Branco 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.

August Precipitation in Castelo Branco

In Castelo Branco in August, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.

August Precipitation Trends in Castelo Branco

The chart displays monthly precipitation patterns in Castelo Branco, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Castelo Branco, August typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec3350787529123333537665
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Castelo Branco

In Castelo Branco in August humidity is 60%. With an average temperature of 25°C (78°F), this humidity feels like a warm embrace, making travel comfortable yet slightly sticky, where every step brings a refreshing breeze that dances around you, inviting exploration while reminding you to stay hydrated.

August Average Humidity in Castelo Branco

This chart illustrates the average monthly humidity levels in Castelo Branco, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Castelo Branco is approximately 60%, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Castelo Branco

In Castelo Branco in August, 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 Castelo Branco.

Maximum UV Index Levels in Castelo Branco for August

The chart shows the monthly maximum UV Index (UVI) for Castelo Branco in August, 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 August, the maximum UV index in Castelo Branco typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689111098643
Data source: Castelo Branco August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)33 mm (1.3 inches)85%moderate
February Weather11°C (52°F)50 mm (2.0 inches)75%moderate
March Weather12°C (54°F)78 mm (3.1 inches)72%high
April Weather15°C (58°F)75 mm (2.9 inches)70%very high
May Weather19°C (67°F)29 mm (1.2 inches)70%very high
June Weather22°C (72°F)12 mm (0.5 inches)63%extreme
July Weather25°C (77°F)3 mm (0.1 inches)60%very high
August Weather25°C (78°F)3 mm (0.1 inches)60%very high
September Weather23°C (73°F)33 mm (1.3 inches)67%very high
October Weather18°C (65°F)53 mm (2.1 inches)74%high
November Weather12°C (54°F)76 mm (3.0 inches)83%moderate
December Weather10°C (50°F)65 mm (2.6 inches)85%moderate

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