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August Weather in Rio Maior, Portugal

Last updated: August 27, 2025

In August, the average temperature in Rio Maior, Portugal hovers around 21°C (70°F), providing a pleasant climate for outdoor activities. Be prepared for temperatures that can dip as low as 14°C (58°F) or rise to a sweltering 40°C (105°F). On average, you can expect 6 mm (0.2 in) of precipitation over the course of 1 day, along with a comfortable humidity level of 60%.

August Temperature in Rio Maior

In August in Rio Maior, the average temperature is 21°C (70°F). Maximums can reach 40°C (105°F), while minimums can drop to as low as 14°C (58°F). Pack your bags for a delightful mix of warm days and cooler evenings while exploring Rio Maior!

August Weather in Rio Maior: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Rio Maior, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Maior, August typically has an average temperature of 21°C (70°F), with highs reaching up to 40°C (105°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec515456596466707069645754
Data source: Temperature data for Rio Maior 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 Rio Maior

In Rio Maior in August, the precipitation amount is 6 mm (0.2 in) over the course of 1 day.

August Precipitation Trends in Rio Maior

The chart displays monthly precipitation patterns in Rio Maior, 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 Rio Maior, August typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec4153748339166627588864
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Rio Maior

In Rio Maior in August humidity is 60%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making travel comfortable yet slightly sticky, as the air holds onto heat, adding a touch of clamminess that gently envelopes you while exploring.

August Average Humidity in Rio Maior

This chart illustrates the average monthly humidity levels in Rio Maior, 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 Rio Maior 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 Rio Maior

In Rio Maior 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 Rio Maior.

Maximum UV Index Levels in Rio Maior for August

The chart shows the monthly maximum UV Index (UVI) for Rio Maior 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 Rio Maior typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Rio Maior 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 Rio Maior Compares to Other Months

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

This table compares monthly weather conditions in Rio Maior, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)41 mm (1.6 inches)85%moderate
February Weather12°C (54°F)53 mm (2.1 inches)75%moderate
March Weather13°C (56°F)74 mm (2.9 inches)72%high
April Weather15°C (59°F)82 mm (3.2 inches)70%very high
May Weather18°C (64°F)39 mm (1.5 inches)70%very high
June Weather19°C (67°F)16 mm (0.6 inches)63%extreme
July Weather21°C (70°F)6 mm (0.2 inches)60%very high
August Weather21°C (70°F)6 mm (0.2 inches)60%very high
September Weather21°C (69°F)27 mm (1.1 inches)67%very high
October Weather18°C (65°F)58 mm (2.3 inches)74%high
November Weather14°C (57°F)88 mm (3.5 inches)83%moderate
December Weather12°C (54°F)64 mm (2.5 inches)85%moderate

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