August Weather in Oeiras, Portugal

Last updated: August 27, 2025

In Oeiras, Portugal, the average temperature for August hovers around 20°C (69°F), offering a pleasant climate. You can expect temperatures to range from a minimum of 16°C (61°F) to a maximum of 35°C (95°F). The month typically sees a low precipitation amount of just 3 mm (0.1 in) over 0 days, with an average humidity of 60% ensuring comfortable air quality.

August Temperature in Oeiras

In August in Oeiras, the average temperature is 20°C (69°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop as low as 16°C (61°F). This pleasant climate makes it an ideal destination for travelers seeking a comfortable getaway.

August Weather in Oeiras: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Oeiras, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oeiras, August typically has an average temperature of 20°C (69°F), with highs reaching up to 35°C (95°F) and lows dropping to around 16°C (61°F).

Data source: Temperature data for Oeiras generated using information from the Copernicus Climate Change Service.

August Precipitation in Oeiras

In Oeiras in August, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

August Precipitation Trends in Oeiras

The chart displays monthly precipitation patterns in Oeiras, 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 Oeiras, August typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Oeiras

In Oeiras in August humidity is 60%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making it quite pleasant for traveling, as the air is soft and invigorating, perfect for exploring the sights and enjoying the local culture without feeling overwhelmed.

August Average Humidity in Oeiras

This chart illustrates the average monthly humidity levels in Oeiras, 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 Oeiras is approximately 60%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Oeiras

In Oeiras 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 Oeiras.

Maximum UV Index Levels in Oeiras for August

The chart shows the monthly maximum UV Index (UVI) for Oeiras 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 Oeiras typically reaches 9, which falls under the very high exposure category.

Data source: Oeiras 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 Oeiras Compares to Other Months

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

This table compares monthly weather conditions in Oeiras, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	37 mm (1.5 inches)	85%	moderate
February Weather	13°C (55°F)	53 mm (2.1 inches)	75%	moderate
March Weather	14°C (57°F)	66 mm (2.6 inches)	72%	high
April Weather	15°C (59°F)	73 mm (2.9 inches)	70%	very high
May Weather	17°C (63°F)	36 mm (1.4 inches)	70%	very high
June Weather	18°C (66°F)	11 mm (0.4 inches)	63%	extreme
July Weather	20°C (68°F)	5 mm (0.2 inches)	60%	very high
August Weather	20°C (69°F)	3 mm (0.1 inches)	60%	very high
September Weather	20°C (68°F)	27 mm (1.1 inches)	67%	very high
October Weather	18°C (65°F)	46 mm (1.8 inches)	74%	high
November Weather	15°C (59°F)	80 mm (3.2 inches)	83%	moderate
December Weather	13°C (56°F)	62 mm (2.4 inches)	85%	moderate