September · Portugal
Best time to visit Lisbon in September Weather, crowds & prices
Weather in Lisbon in September
Average temperature 20°C, 42 mm of rain, about 22 days with 6+ hours of sunshine and 83% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.0/10
Ranked #6 of 12 months
- Avg temp
- 20°C
- Rainfall
- 42 mm
- Humidity
- 83%
- Days with 6h+ sun
- 22
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Lisbon scores 9.0/10 for sightseeing and cultural travel - an above-average month (#6 of 12). Expect around 20°C, 42 mm of rain, and roughly 22 days with 6+ hours of sunshine this month.
Hill-climbing trams, panoramic miradouros, and soft Atlantic light make April through June Lisbon at its finest.
September ranks 6th of 12 for Lisbon — one of the best windows
At 20°C (68°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
With around 42 mm of rain, any showers tend to pass through rather than settle in; about 22 days with 6+ hours of sunshine and 12.2 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Lisbon at 9/10 (6th of 12), just behind April at 9.5/10.
Pack light clothing, a hat and real sun protection.
Expect mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Lisbon in September?
- In September, Lisbon averages 20°C, 42 mm of rain, and about 22 days with 6+ hours of sunshine. Its climate-comfort score is 9.0/10.
- Is September a good time to visit Lisbon?
- September earns a 9.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Lisbon in September?
- Expect about 42 mm of rain in September. Average humidity is 83% and there are about 22 days with 6+ hours of sunshine.
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