What is the weather like in San Juan throughout the year?

San Juan experiences varying weather throughout the year. The warmest month is September with average highs of 31°C. The coolest month is December.

What is the weather like in San Juan in January?

San Juan in January scores 65/100 based on 30 years of climate data. Recommended for planning your trip.

Who should visit San Juan in January?

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

Best Time to Visit San Juan | 30-Year Weather Analysis

Why January is the Best Time to Visit San Juan

Is January a Good Time to Visit San Juan?

👍Recommended for planning your trip(65/100)

Short Answer

January perfect for San Juan's beaches - 27.2°C water temperature, 28°C days, minimal 20% rain. Book beachfront early as this is peak coastal season.

Decision Factors

Vaccinations required

Yellow Fever

Warm tropical seas

27.2°C sea temperature - Tropical Bath

Rough sea conditions

1.52m average wave height - Surfers Only

Peak tourist season

85% of annual peak - expect crowds and high prices

Health precautions needed

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

Plenty of sunshine

10.3h of sunshine daily

Good For

🏖️
Beach lovers
27.2°C warm seas and 20% rain probability
🥾
Outdoor enthusiasts
Ideal hiking conditions: 27.9°C, 20% rain chance
📸
Photographers
10.3h sunshine, 61% clear skies for golden hour shots
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💑
Honeymoon couples
Wedding score 96/100 with romantic weather conditions

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
78% humidity creates difficult conditions

Warmest

September

31°C avg

Coolest

December

28°C avg

Driest

January

20% rain

Wettest

September

45% rain

Planning Your Trip to San Juan, Puerto Rico

Wondering when is the best time to visit San Juan? Based on our analysis of 30 years of NASA satellite weather data, the ideal months to travel to San Juan are January, February, December. During these months, you'll experience optimal temperatures around 28°C with only 20% chance of rain.

The San Juan climate varies throughout the year. September is the hottest month with average highs of 31°C, while December is the coldest at 28°C. If you're planning outdoor activities or sightseeing in San Juan, avoid September when rainfall peaks at 45% probability.

For the best San Juan weather experience, we recommend visiting during January for the driest conditions or the shoulder months of January and February for a perfect balance of weather and fewer crowds.

San Juan Weather by Month: Climate Guide

Click any month to explore detailed daily forecasts for San Juan

🏆 85-100: Excellent👍 70-84: Great👌 55-69: Good🤔 40-54: Fair⚠️ 0-39: Challenging

When to Visit San Juan: Travel Style Guide

Personalized San Juan travel recommendations based on 30-year weather data

Beach Lovers

Warmest weather with ideal sea temperatures for swimming

JuneJulyAugust

Budget Travelers

Shoulder season with good weather and lower prices

AprilMayJune

Avoiding Crowds

Fewer tourists with acceptable weather conditions

AprilMayJune

Photography

Best light conditions with clear skies

JanuaryFebruaryDecember

Honeymoon

Perfect conditions for a romantic getaway

JanuaryFebruaryMarch

San Juan Weather FAQ: Your Questions Answered

What is the best time to visit San Juan?

Based on 30 years of weather data, the best months to visit San Juan are January, February, December. These months offer the optimal combination of pleasant temperatures (28°C avg) and low rainfall (20% chance).

When is the hottest time of year in San Juan?

September is historically the warmest month in San Juan with average highs of 31°C. If you prefer cooler weather, consider visiting in December when temperatures average around 28°C.

When is the rainy season in San Juan?

September typically sees the most rainfall in San Juan with a 45% chance of rain. For the driest conditions, plan your visit in January when rain probability drops to just 20%.

How accurate is the San Juan weather forecast?

Our San Juan climate analysis is based on 30 years of NASA POWER satellite observations (1995-2024), providing highly accurate historical averages. While weather can vary year to year, these long-term patterns are excellent indicators for planning your trip to San Juan.

What should I pack for San Juan?

Packing depends on when you visit. In September (warmest month), pack light summer clothes for 31°C weather. In December (coolest month), bring layers for 28°C temperatures. During September, pack rain gear as there's a 45% chance of rain.

Is San Juan good for a destination wedding?

Yes! The best months for an outdoor wedding in San Juan are January (only 20% rain chance) and January for optimal weather conditions. Avoid September when rain probability peaks at 45%.