What is the weather like in Sintra in December?

Expect temperatures between 10°C and 15°C with 27% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Sintra in December?

Sintra in December scores 61/100 based on 30 years of climate data. Good option with minor considerations.

Who should visit Sintra in December?

December in Sintra is ideal for: Cultural tourists, Business travelers.

Sintra Weather in December | 30-Year Forecast

Avg High

15°C

Hottest around day 8

Avg Low

10°C

Coolest around day 16

Rainy Days

25days

27% avg rain chance

Sunshine

8hrs/day

Winter season

Essential Travel Info for Sintra

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

EUR

€ Euro

Language

Portuguese

Driving

Right side

Safety

Very High Safety

GPI: 1.301

Travel Intelligence

Exclusive flight analytics & health data for Sintra

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Well Connected

63/ 100

Traffic Index

Popular destination

Peak Daily Arrivals

slots per day

Peak

Jun

Low

Jul

Monthly Traffic Distribution

262

Jan

304

Feb

304

Mar

322

Apr

340

May

343

Jun

209

Jul

297

Aug

297

Sep

297

Oct

297

Nov

297

Dec

Traffic Level

Low Season

Key Connections

Madrid Adolfo Suárez –Barajas (MAD)

Funchal Madeira (FNC)

Paris Orly (ORY)

Barcelona (BCN)

Porto Francisco de Sá Carneiro (OPO)

Health & Safety Advisory

CDC travel health recommendations

6 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Portugal. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Portugal.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in Portugal.If rabies exposures occur while in Portugal, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

Yellow Fever

CDC recommendations:Vaccine isnotrecommended.Country entry requirements:Vaccine isnotrequired.Updated April 23, 2025

Source: CDC Travelers' Health

View Complete Health Guide

Is December a Good Time to Visit Sintra?

👌Good option with minor considerations(61/100)

Short Answer

Popular December in Sintra offers 15°C and 27% rain chance - excellent conditions that attract maximum visitors. Book 3-6 months ahead for best rates.

Decision Factors

Vaccinations required

Yellow Fever

Very high humidity

81% average humidity

Peak tourist season

87% of annual peak - expect crowds and high prices

Health precautions needed

Be aware of: Leptospirosis, Leishmaniasis, Zika

Exceptional dining scene

50 Michelin-listed restaurants

Good For

🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
81% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Sintra in December averages 15°C with 27% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Sintra in December

What are the temperatures in Sintra in December?

Daytime highs average 15°C, nights drop to 10°C. Temperatures remain fairly consistent.

How many rainy days in Sintra in December?

Expect around 25 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Sintra in December?

Layers are key. A medium-weight jacket and closed-toe shoes.

Is December peak season in Sintra?

This is shoulder season—moderate prices and manageable crowds.

Sintra Weather in December

Sintra December Weather Calendar

Essential Travel Info for Sintra

Travel Intelligence

Smart Flight Estimator

Flight Connectivity Analysis

Monthly Traffic Distribution

Key Connections

Health & Safety Advisory

COVID-19

Hepatitis A

Hepatitis B

Measles

Rabies

Yellow Fever

Is December a Good Time to Visit Sintra?

Decision Factors

Good For

Who Should Avoid

Related Guides

Frequently Asked Questions: Sintra in December

What are the temperatures in Sintra in December?

How many rainy days in Sintra in December?

What to wear in Sintra in December?

Is December peak season in Sintra?