April Weather in Porto, Spain

Last updated: August 27, 2025

In Porto, Spain, the average temperature in April hovers around 9°C (48°F). Expect a chilly minimum of -5°C (23°F), while temperatures can soar to a pleasant 22°C (71°F). This month, precipitation totals about 120 mm (4.7 in) over 16 days, contributing to a high average humidity of 83%.

April Temperature in Porto

In April in Porto, the average temperature is 9°C (48°F), with maximums reaching 22°C (71°F) and minimums dipping as low as -5°C (23°F). It's a time to pack layers and be prepared for a mix of cool and mild weather, making it ideal for outdoor adventures and exploration.

April Weather in Porto: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Porto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Porto, April typically has an average temperature of 9°C (48°F), with highs reaching up to 22°C (71°F) and lows dropping to around -5°C (23°F).

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

April Precipitation in Porto

In Porto in April, the precipitation amount is 120 mm (4.7 in) spread over 16 days.

April Precipitation Trends in Porto

The chart displays monthly precipitation patterns in Porto, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Porto, April typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 16 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Porto

In Porto in April humidity is 83%. With an average temperature of 9°C (48°F), this humidity feels like an enveloping blanket, making outdoor activities quite uncomfortable and encouraging travelers to seek shelter or shade frequently.

April Average Humidity in Porto

This chart illustrates the average monthly humidity levels in Porto, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Porto is approximately 83%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Porto

In Porto in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Porto.

Maximum UV Index Levels in Porto for April

The chart shows the monthly maximum UV Index (UVI) for Porto in April, 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 April, the maximum UV index in Porto typically reaches 8, which falls under the very high exposure category.

Data source: Porto April 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 April Weather in Porto Compares to Other Months

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

This table compares monthly weather conditions in Porto, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	80 mm (3.2 inches)	87%	low
February Weather	5°C (41°F)	123 mm (4.8 inches)	85%	moderate
March Weather	6°C (43°F)	135 mm (5.3 inches)	83%	high
April Weather	9°C (48°F)	120 mm (4.7 inches)	83%	very high
May Weather	12°C (54°F)	100 mm (4.0 inches)	84%	very high
June Weather	15°C (59°F)	94 mm (3.7 inches)	84%	extreme
July Weather	18°C (64°F)	49 mm (1.9 inches)	86%	very high
August Weather	18°C (64°F)	34 mm (1.3 inches)	78%	very high
September Weather	15°C (59°F)	71 mm (2.8 inches)	77%	very high
October Weather	11°C (53°F)	99 mm (3.9 inches)	82%	high
November Weather	6°C (43°F)	142 mm (5.6 inches)	86%	moderate
December Weather	5°C (41°F)	182 mm (7.2 inches)	87%	low