Porto
Portugal
Long-term weather forecast
Long-term weather forecast
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May weather forecast and Climate
Porto, Portugal

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Ships docked along the shores on the coastal city of Porto, Portugal, on a calm sunny day with clear skies
Ships docked along the shores on the coastal city of Porto, Portugal, on a calm sunny day with clear skies
  • The average high temperature in May: 20.1°C

The warmest month (with the highest average high temperature) is August (25.7°C).
The month with the lowest average high temperature is January (13.8°C).

  • The average low temperature in May: 11.6°C

Months with the highest average low temperature are July and August (15.9°C).
The coldest month (with the lowest average low temperature) is January (5.2°C).

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  • The average rainfall in May: 89.6mm

The wettest month (with the highest rainfall) is December (181mm).
The driest month (with the lowest rainfall) is July (20.4mm).

  • The average rainfall days in May: 13 days

The month with the highest number of rainy days is January (17 days).
The month with the lowest number of rainy days is August (5 days).

  • The average sea temperature in May: 16.5°C

The best month for swimming (with the highest average sea temperature) is September (18.2°C).
Coldest months (with the lowest average sea temperature) are February and March (13.8°C).

  • The average daylight in May: 15h

Months with the longest days are May, June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The average sunshine in May: 8.3h

The month with most sunshine is July (Average sunshine: 9.9h).
Months with least sunshine are January and December (Average sunshine: 4).

  • The average UV index in May: 7

Months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 1).

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