May Weather in Serta, Portugal

Last updated: August 27, 2025

In May, the average temperature in Serta, Portugal hovers around 18°C (64°F), making for a mild climate. Temperatures can range from a chilly 4°C (40°F) to a warm 33°C (92°F), offering a diverse experience. Expect precipitation of about 50 mm (1.9 in) spread across 6 days, with an average humidity level of 70%. Whether you're basking in the warmth or enjoying cooler evenings, this month brings a unique charm to Serta.

May Temperature in Serta

In May in Serta, the average temperature is 18°C (64°F). The maximum can reach 33°C (92°F) and the minimum can be as low as 4°C (40°F). This makes it an ideal time for travelers seeking a pleasant climate while enjoying outdoor activities.

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

The chart illustrates May temperature patterns in Serta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Serta, May typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (40°F).

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

May Precipitation in Serta

In Serta in May, the precipitation amount is 50 mm (1.9 in) over the course of 6 days.

May Precipitation Trends in Serta

The chart displays monthly precipitation patterns in Serta, 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 Serta, May typically receives around 50 mm (1.9 inches) of precipitation spread over approximately 6 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Serta

In Serta in May humidity is 70%. With an average temperature of 18°C (64°F), this humidity feels like a sticky embrace, making outdoor excursions a bit more cumbersome and requiring frequent breaks to stay refreshed and hydrated.

May Average Humidity in Serta

This chart illustrates the average monthly humidity levels in Serta, 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 Serta is approximately 70%, 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 Serta

In Serta in May, 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 Serta.

Maximum UV Index Levels in Serta for May

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

Data source: Serta 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 Serta Compares to Other Months

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

This table compares monthly weather conditions in Serta, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	52 mm (2.0 inches)	85%	moderate
February Weather	10°C (51°F)	78 mm (3.1 inches)	75%	moderate
March Weather	12°C (53°F)	121 mm (4.8 inches)	72%	high
April Weather	14°C (57°F)	108 mm (4.3 inches)	70%	very high
May Weather	18°C (64°F)	50 mm (1.9 inches)	70%	very high
June Weather	20°C (68°F)	21 mm (0.8 inches)	63%	extreme
July Weather	23°C (73°F)	6 mm (0.2 inches)	60%	very high
August Weather	23°C (74°F)	8 mm (0.3 inches)	60%	very high
September Weather	21°C (71°F)	35 mm (1.4 inches)	67%	very high
October Weather	17°C (63°F)	75 mm (2.9 inches)	74%	high
November Weather	12°C (54°F)	117 mm (4.6 inches)	83%	moderate
December Weather	10°C (50°F)	102 mm (4.0 inches)	85%	moderate