Lisbon weather in September 2025

Expect daytime maximum temperatures of 81°F in Lisbon, Portugal in September based on long-term weather averages. There are 9 hours of sunshine per day on average.

  • 81°F maximum daytime temperature in September in Lisbon81
    81°F max day temperature
  • 9 hours of sunshine per day
  • 6 days with some rainfall in September in Lisbon6
    6 days with some rainfall
  • 63°F minimum night-time temperature in September in Lisbon63
    63°F min night temperature
  • 12 hours of daylight per day in September in Lisbon12
    12 hours of daylight per day
  • Low heat & humidity in September in LisbonL
    Low heat & humidity
  • 1.0 inches monthly rainfall in September in Lisbon1.0
    1.0 inches of monthly rainfall
  • UV (maximum) index 6 (High) in September in Lisbon6
    6 (High) UV index
  • 66°F sea temperature in September in Lisbon66
    66°F sea temperature

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The September weather guide for Portugal (Lisbon) 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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How hot is it in Lisbon in September?

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

How sunny is it in Lisbon in September?

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

How warm is the sea around Lisbon in September?

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

Does it rain in Lisbon in September?

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

Lisbon September sunrise & sunset times

Browse the sunrise and sunset times for Lisbon in September 2025. Select a month to view Lisbon sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:06 19:07
Monday, 15th September 2025 06:18 18:45
Tuesday, 30th September 2025 06:32 18:21

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