October 31 is generally a great time to visit Sintra. While there is a slight chance of rain (34%), showers are usually brief. Expect comfortable 19°C weather. As it's peak season for Sintra, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Sintra
Currency
EUR
€ Euro
Language
Portuguese
Driving
Right side
Safety
Very High Safety
GPI: 1.301
Sintra Weather Forecast for October 31
"Mild & Comfortable. Expect average highs of 18.6°C. 34% chance of rain."
What to Wear in Sintra in October
Based on historical data for October 31, Sintra typically experiences temperatures between 14.2°C and 18.6°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 34% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Sintra
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
18.6°C
Daytime Peak
Average Low
14.2°C
Nighttime Low
Feels Like
18.6°C
🌤️ Feels accurate
Rain Chance
34%
Avg 2.2mm if it rains
Cloud Cover
62%
Overcast
Pressure
1017.2 hPa
Medium volatility
Sintra Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 84% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 62 min to burn
Type III-IV
🟡 93 min to burn
Type V-VI
🟢 155 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
15.5°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Portugal
Flight Traffic
High
87/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~297
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Sintra
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
08:04
☀️ Noon
13:22
🌇 Sunset
18:40
⏱️ Daylight
10h 36m
Wind Speed
20.4 km/h
Moderate wind
Sunshine
7.2 hrs
Direct Sun (Cloud-free)
Humidity
82%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Sintra
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Sintra
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Sintra on October 31 averages 18.6°C with a 34% precipitation probability. Wedding/Outdoor Event Score: 89/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Sintra Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
October 28
19.2°C • 28% rain
Score
93
October 26
19.4°C • 31% rain
Score
92
October 24
19.5°C • 36% rain
Score
91
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (October 31) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Sintra Worth Visiting on October 31?
Planning a trip to Sintra on October 31? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 18.6°C with a 34% historical precipitation risk.
✈️ Travel Logistics: Approximately 297 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Portugal, including COVID-19.
📊 Historical Extremes: The hottest October 31 recorded in the last 30 years saw temperatures hit 21.7°C in 2017, while the coldest dropped to 8.4°C in 2018.