December · Portugal
Best time to visit Sintra in December Weather, crowds & prices
Weather in Sintra in December
Average temperature 12°C, 112 mm of rain, about 23 days with 6+ hours of sunshine and 84% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
6.6/10
Ranked #12 of 12 months
- Avg temp
- 12°C
- Rainfall
- 112 mm
- Humidity
- 84%
- Days with 6h+ sun
- 23
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
December in Sintra scores 6.6/10 for sightseeing and cultural travel - ranked #12 of 12. Expect around 12°C, 112 mm of rain, and roughly 23 days with 6+ hours of sunshine this month.
Sintra's palaces and gardens climb the hills west of Lisbon among mist and forest.
December in Sintra — workable with trade-offs
Temperatures hover around 12°C (54°F) — the kind of month where neither heat nor cold forces the schedule.
112 mm of rain makes this a wet month here, though with about 23 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 6.6/10 on the same scale — 12th of 12 months, versus 9.7/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, May is materially better in Sintra — 3.1 points higher on the same scale.
Frequently asked
- What is the weather like in Sintra in December?
- In December, Sintra averages 12°C, 112 mm of rain, and about 23 days with 6+ hours of sunshine. Its climate-comfort score is 6.6/10.
- Is December a good time to visit Sintra?
- December earns a 6.6/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Sintra in December?
- Expect about 112 mm of rain in December. Average humidity is 84% and there are about 23 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.