May Weather in Olhao, Portugal

Last updated: August 27, 2025

In Olhao, Portugal, the average temperature in May is a pleasant 18°C (65°F). During this time, you can expect a minimum temperature of 11°C (52°F) and a maximum reaching up to 26°C (78°F). With a total precipitation of 14 mm (0.6 in) spread over 3 days, the average humidity hovers around 69%, offering a refreshing atmosphere for all types of activities.

May Temperature in Olhao

In May in Olhao, the average temperature is 18°C (65°F). Maximums can reach 26°C (78°F), while minimums can drop to as low as 11°C (52°F). This comfortable climate makes Olhao an ideal destination for travelers looking to enjoy a pleasant escape without extreme weather conditions.

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

The chart illustrates May temperature patterns in Olhao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Olhao, May typically has an average temperature of 18°C (65°F), with highs reaching up to 26°C (78°F) and lows dropping to around 11°C (52°F).

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

May Precipitation in Olhao

In Olhao in May, the precipitation amount is 14 mm (0.6 in) accumulated over the course of 3 days.

May Precipitation Trends in Olhao

The chart displays monthly precipitation patterns in Olhao, 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 Olhao, May typically receives around 14 mm (0.6 inches) of precipitation spread over approximately 3 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Olhao

In Olhao in May humidity is 69%. With an average temperature of 18°C (65°F), this humidity feels like a warm, damp blanket around you, making travel less comfortable and causing you to feel sticky and fatigued more quickly.

May Average Humidity in Olhao

This chart illustrates the average monthly humidity levels in Olhao, 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 Olhao is approximately 69%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Olhao

In Olhao 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 Olhao.

Maximum UV Index Levels in Olhao for May

The chart shows the monthly maximum UV Index (UVI) for Olhao 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 Olhao typically reaches 10, which falls under the very high exposure category.

Data source: Olhao 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 Olhao Compares to Other Months

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

This table compares monthly weather conditions in Olhao, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	26 mm (1.0 inches)	80%	moderate
February Weather	14°C (58°F)	45 mm (1.8 inches)	73%	moderate
March Weather	15°C (59°F)	68 mm (2.7 inches)	71%	high
April Weather	16°C (60°F)	49 mm (1.9 inches)	69%	very high
May Weather	18°C (65°F)	14 mm (0.6 inches)	69%	very high
June Weather	20°C (68°F)	3 mm (0.1 inches)	67%	extreme
July Weather	22°C (72°F)	2 mm (0.1 inches)	69%	very high
August Weather	23°C (74°F)	0 mm (0.0 inches)	68%	very high
September Weather	22°C (72°F)	11 mm (0.4 inches)	71%	very high
October Weather	20°C (68°F)	28 mm (1.1 inches)	75%	high
November Weather	16°C (62°F)	59 mm (2.3 inches)	78%	moderate
December Weather	15°C (59°F)	44 mm (1.7 inches)	81%	moderate