Porto weather in September 2026

Expect daytime maximum temperatures of 75°F in Porto, Portugal in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 2.4 inches of rainfall in the month.

  • 75°F maximum daytime temperature in September in Porto75
    75°F max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Porto8
    8 days with some rainfall
  • 57°F minimum night-time temperature in September in Porto57
    57°F min night temperature
  • 12 hours of daylight per day in September in Porto12
    12 hours of daylight per day
  • No heat & humidity in September in Porto0
    No heat & humidity
  • 2.4 inches monthly rainfall in September in Porto2.4
    2.4 inches of monthly rainfall
  • UV (maximum) index 6 (High) in September in Porto6
    6 (High) UV index
  • 64°F sea temperature in September in Porto64
    64°F sea temperature

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The September weather guide for Portugal (Porto) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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More about Portugal

How hot is it in Porto in September?

Daytime temperatures usually reach 81°F in Porto in September with low heat and humidity, falling to 63°F at night.

How sunny is it in Porto in September?

There are normally 9 hours of bright sunshine each day in Porto in September - that's 68% of daylight hours.

How warm is the sea around Porto in September?

The average sea temperature around Porto in September is 66°F.

Does it rain in Porto in September?

There are usually 6 days with some rain in Porto in September and the average monthly rainfall is 1.0 inches.

Porto September sunrise & sunset times

Browse the sunrise and sunset times for Porto in September 2026. Select a month to view Porto sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 06:01 19:07
Tuesday, 15th September 2026 06:15 18:44
Wednesday, 30th September 2026 06:30 18:18

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