What is the weather like in San Juan in December?

Expect temperatures between 23°C and 28°C with 21% average rain probability and about 8 hours of sunshine daily.

What is the weather like in San Juan in December?

San Juan in December scores 60/100 based on 30 years of climate data. Worthwhile timing with some trade-offs.

Who should visit San Juan in December?

December in San Juan is ideal for: Beach lovers, Outdoor enthusiasts, Photographers, Cultural tourists, Honeymoon couples.

San Juan Weather in December | 30-Year Forecast

Avg High

28°C

Hottest around day 1

Avg Low

23°C

Coolest around day 25

Rainy Days

3days

21% avg rain chance

Sunshine

8hrs/day

Winter season

Sea Temperature in December

Atlantic Ocean(Océano Atlántico)

28.1°C

Monthly Average

Water Feel

🌴Tropical

Perfect for swimming and water sports

Swim Rating

✅Excellent for swimming

Based on average sea surface temperature

Body of Water

Atlantic Ocean

Océano Atlántico

San Juan coastline

Essential Travel Info for San Juan

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

USD

$ United States dollar

Language

English

+1 more

Driving

Right side

Travel Intelligence

Exclusive flight analytics & health data for San Juan

Smart Flight Estimator

Airport-to-Airport Logistics

unlock smart flight estimates

Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate

52/ 100

Traffic Index

Balanced traffic

Peak Daily Arrivals

slots per day

Peak

Mar

Low

Oct

Monthly Traffic Distribution

183

Jan

197

Feb

216

Mar

190

Apr

203

May

191

Jun

156

Jul

159

Aug

109

Sep

Oct

154

Nov

162

Dec

Traffic Level

Low Season

Key Connections

Orlando (MCO)

Gustavia Gustaf III (SBH)

New York John F Kennedy (JFK)

Miami (MIA)

Fort Lauderdale Hollywood (FLL)

Health & Safety Advisory

CDC travel health recommendations

7 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

Recommended for unvaccinated travelers one year old or older going to Puerto Rico.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

Recommended for unvaccinated travelers of all ages traveling to Puerto Rico.

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 Puerto Rico.Rabies is commonly found in some terrestrial wildlife species and bats.If rabies exposures occur while in Puerto Rico, 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.

Typhoid

Recommended for most travelers, especially those staying with friends or relatives or visiting smaller cities or rural areas.

+1 more

Source: CDC Travelers' Health

View Complete Health Guide

Is December a Good Time to Visit San Juan?

👌Worthwhile timing with some trade-offs(60/100)

Short Answer

Ideal beach conditions in San Juan during December: 28.1°C turquoise waters, 28°C air, 21% rain. 1.7m calm waves suit families and swimmers alike.

Decision Factors

Oppressive heat and humidity

28.2°C with 80% humidity - challenging conditions

Vaccinations required

Yellow Fever

Warm tropical seas

28.1°C sea temperature - Tropical Bath

Rough sea conditions

1.65m average wave height - Surfers Only

Health precautions needed

Be aware of: Leptospirosis, Melioidosis, African Tick-Bite Fever

Plenty of sunshine

10h of sunshine daily

Good For

🏖️
Beach lovers
28.1°C warm seas and 21% rain probability
🥾
Outdoor enthusiasts
Ideal hiking conditions: 28.2°C, 21% rain chance
📸
Photographers
10h sunshine, 58% clear skies for golden hour shots
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💑
Honeymoon couples
Wedding score 94/100 with romantic weather conditions

Who Should Avoid

👴
Elderly travelers
80% humidity creates difficult conditions
🌡️
Heat-sensitive visitors
33°C feels-like temperature creates discomfort

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,San Juan in December averages 28°C with 21% precipitation probability."

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

Frequently Asked Questions: San Juan in December

What are the temperatures in San Juan in December?

Daytime highs average 28°C, nights drop to 23°C. Temperatures remain fairly consistent.

How many rainy days in San Juan in December?

Expect around 3 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in San Juan in December?

Comfortable casual wear with a light jacket for evenings.

Is December peak season in San Juan?

This is typically peak season with higher prices. Book 2-3 months ahead.

San Juan Weather in December