September · Portugal
Best time to visit Sintra in September Weather, crowds & prices
Weather in Sintra in September
Average temperature 19°C, 61 mm of rain, about 27 days with 6+ hours of sunshine and 79% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.7/10
Ranked #6 of 12 months
- Avg temp
- 19°C
- Rainfall
- 61 mm
- Humidity
- 79%
- Days with 6h+ sun
- 27
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Sintra scores 8.7/10 for sightseeing and cultural travel - an above-average month (#6 of 12). Expect around 19°C, 61 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Sintra's palaces and gardens climb the hills west of Lisbon among mist and forest.
September in Sintra — one of the year's strongest windows (6th)
At 19°C (66°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
Budget for roughly 61 mm of rain this month — a flexible day or two helps — with about 27 days with 6+ hours of sunshine and 12.4 hours of daylight to work around it.
On our climate-comfort scale this is one of the strongest months of the year for Sintra at 8.7/10 (6th of 12), just behind May at 9.7/10.
Pack light clothing, a hat and real sun protection, a packable rain layer.
Expect mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Sintra in September?
- In September, Sintra averages 19°C, 61 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 8.7/10.
- Is September a good time to visit Sintra?
- September earns a 8.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Sintra in September?
- Expect about 61 mm of rain in September. Average humidity is 79% and there are about 27 days with 6+ hours of sunshine.
Curated in Sintra
Tickets & experiences
Things to do in Sintra
Sintra, Portugal. Live activities and tours from GetYourGuide, matched to this destination.