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March Weather in Porto, Spain

Last updated: August 27, 2025

In March, the average temperature in Porto, Spain hovers around 6°C (43°F). However, be prepared for a wide range, as temperatures can dip to a minimum of -7°C (20°F) and soar to a maximum of 20°C (69°F). Expect precipitation of approximately 135 mm (5.3 in) over 14 days, with an average humidity level of 83%. Remember to pack accordingly!

March Temperature in Porto

In March in Porto, the average temperature is 6°C (43°F). Maximums can reach 20°C (69°F), while minimums can drop as low as -7°C (20°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates March 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, March typically has an average temperature of 6°C (43°F), with highs reaching up to 20°C (69°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec384143475459646459524341
Data source: Temperature data for Porto generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in Porto

In Porto in March, the precipitation amount is 135 mm (5.3 in) over a period of 14 days.

March Precipitation Trends in Porto

The chart displays monthly precipitation patterns in Porto, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Porto, March typically receives around 135 mm (5.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec811231351201009449347199142182
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Porto

In Porto in March, humidity is 83%. With an average temperature of 6°C (43°F), this humidity feels like a brisk chill that can make you feel colder than the actual temperature, often leading to a damp and uncomfortable experience for traveling.

March Average Humidity in Porto

This chart illustrates the average monthly humidity levels in Porto, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Porto is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%83%83%84%84%86%78%77%82%86%87%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Porto

In Porto in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Porto, you can refer to this Hourly UV Index in Porto.

Maximum UV Index Levels in Porto for March

The chart shows the monthly maximum UV Index (UVI) for Porto in March, 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 March, the maximum UV index in Porto typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689111098632
Data source: Porto March 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 March 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 March’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 March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)80 mm (3.2 inches)87%low
February Weather5°C (41°F)123 mm (4.8 inches)85%moderate
March Weather6°C (43°F)135 mm (5.3 inches)83%high
April Weather9°C (48°F)120 mm (4.7 inches)83%very high
May Weather12°C (54°F)100 mm (4.0 inches)84%very high
June Weather15°C (59°F)94 mm (3.7 inches)84%extreme
July Weather18°C (64°F)49 mm (1.9 inches)86%very high
August Weather18°C (64°F)34 mm (1.3 inches)78%very high
September Weather15°C (59°F)71 mm (2.8 inches)77%very high
October Weather11°C (53°F)99 mm (3.9 inches)82%high
November Weather6°C (43°F)142 mm (5.6 inches)86%moderate
December Weather5°C (41°F)182 mm (7.2 inches)87%low

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