May Weather in Viseu, Portugal

Last updated: August 27, 2025

In Viseu, Portugal, the average temperature in May hovers around 16°C (60°F), with a minimum of 2°C (36°F) and a maximum reaching up to 30°C (87°F). Expect about 68 mm (2.7 in) of precipitation spread over 10 days, contributing to an average humidity of 78%. Be prepared for a mix of pleasant warmth and occasional showers!

May Temperature in Viseu

In May in Viseu, the average temperature is 16°C (60°F). The maximum can reach 30°C (87°F) and the minimum can be as low as 2°C (36°F). This range indicates that travelers should prepare for both warm and cool conditions while enjoying their visit.

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

The chart illustrates May temperature patterns in Viseu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Viseu, May typically has an average temperature of 16°C (60°F), with highs reaching up to 30°C (87°F) and lows dropping to around 2°C (36°F).

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

May Precipitation in Viseu

In Viseu in May, the precipitation amount is 68 mm (2.7 in) over a span of 10 days.

May Precipitation Trends in Viseu

The chart displays monthly precipitation patterns in Viseu, 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 Viseu, May typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 10 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 Viseu

In Viseu in May humidity is 78%. With an average temperature of 16°C (60°F), this humidity feels like a damp embrace, making travel a bit uncomfortable as the air clings to your skin and leaves you feeling sticky.

May Average Humidity in Viseu

This chart illustrates the average monthly humidity levels in Viseu, 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 Viseu is approximately 78%, 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 Viseu

In Viseu 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 Viseu.

Maximum UV Index Levels in Viseu for May

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

Data source: Viseu 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 Viseu Compares to Other Months

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

This table compares monthly weather conditions in Viseu, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	85 mm (3.3 inches)	87%	moderate
February Weather	9°C (48°F)	134 mm (5.3 inches)	81%	moderate
March Weather	10°C (50°F)	152 mm (6.0 inches)	78%	high
April Weather	12°C (54°F)	145 mm (5.7 inches)	79%	very high
May Weather	16°C (60°F)	68 mm (2.7 inches)	78%	very high
June Weather	18°C (64°F)	49 mm (1.9 inches)	71%	extreme
July Weather	20°C (69°F)	19 mm (0.7 inches)	63%	very high
August Weather	21°C (69°F)	19 mm (0.8 inches)	64%	very high
September Weather	19°C (66°F)	47 mm (1.8 inches)	71%	very high
October Weather	15°C (59°F)	108 mm (4.3 inches)	79%	high
November Weather	10°C (50°F)	149 mm (5.9 inches)	86%	moderate
December Weather	8°C (47°F)	174 mm (6.8 inches)	87%	low