September · Portugal
Best time to visit Porto in September Weather, crowds & prices
Weather in Porto in September
Average temperature 19°C, 63 mm of rain, about 19 days with 6+ hours of sunshine and 76% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.6/10
Ranked #6 of 12 months
- Avg temp
- 19°C
- Rainfall
- 63 mm
- Humidity
- 76%
- Days with 6h+ sun
- 19
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Porto scores 8.6/10 for sightseeing and cultural travel - an above-average month (#6 of 12). Expect around 19°C, 63 mm of rain, and roughly 19 days with 6+ hours of sunshine this month.
April–June brings 18–24°C days and soft Atlantic light to Porto’s azulejo-clad Ribeira and port cellars.
September is one of the strongest months in Porto (6th)
September averages 19°C (67°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Rainfall runs 63 mm, so plan one flexible day in three; you still get about 19 days with 6+ hours of sunshine and 12.3 hours of daylight.
A 8.6/10 puts this among the year's best months in Porto (6th of 12); only July scores higher, at 9.8/10.
Pack light clothing, a hat and real sun protection, a packable rain layer.
Figure on mid-season pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Porto in September?
- In September, Porto averages 19°C, 63 mm of rain, and about 19 days with 6+ hours of sunshine. Its climate-comfort score is 8.6/10.
- Is September a good time to visit Porto?
- September earns a 8.6/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Porto in September?
- Expect about 63 mm of rain in September. Average humidity is 76% and there are about 19 days with 6+ hours of sunshine.
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