June 9 is generally a great time to visit San Juan. While there is a slight chance of rain (24%), showers are usually brief. Expect comfortable 31°C weather. San Juan is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for San Juan
Currency
USD
$ United States dollar
Language
English
+1 more
Driving
Right side
San Juan Weather Forecast for June 9
"Warm & Sunny. Expect average highs of 31.2°C. 24% chance of rain."
What to Wear in San Juan in June
Based on historical data for June 9, San Juan typically experiences temperatures between 24.5°C and 31.2°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (24% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for San Juan
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
31.2°C
Daytime Peak
Average Low
24.5°C
Nighttime Low
Feels Like
40.5°C
🔥 Heat index effect
Rain Chance
24%
Avg 1.5mm if it rains
Cloud Cover
64%
Light drizzle
Pressure
1016.2 hPa
Low volatility
San Juan Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 87% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30+ required, seek shade
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 13 min to burn
Type III-IV
🟡 20 min to burn
Type V-VI
🟢 33 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
26.7°C
Humid/Sticky
Heat Index
40.5°C
Feels hotter
😕 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Puerto Rico
Flight Traffic
High
88/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~191
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in San Juan
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:48
☀️ Noon
12:25
🌇 Sunset
19:01
⏱️ Daylight
13h 12m
Wind Speed
20.7 km/h
Moderate wind
Sunshine
11.5 hrs
Direct Sun (Cloud-free)
Humidity
77%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for San Juan
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in San Juan
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Moderate seismic activity. Occasional tremors possible.
Atlantic Hurricane Risk
Season: Jun - Nov
"According to 30YearWeather's analysis of 30 years of NASA satellite data, San Juan on June 9 averages 31.2°C with a 24% precipitation probability. Wedding/Outdoor Event Score: 89/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
San Juan Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
June 6
31.3°C • 21% rain
Score
90
June 7
31.3°C • 21% rain
Score
90
June 8
31.2°C • 22% rain
Score
90
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
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📍 Is San Juan Worth Visiting on June 9?
Planning a trip to San Juan on June 9? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 31.2°C with a 24% historical precipitation risk.
✈️ Travel Logistics: Approximately 191 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Puerto Rico, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 29°C (tropical bath). Wave conditions are generally fun waves with heights around 0.87m.
📊 Historical Extremes: The hottest June 9 recorded in the last 30 years saw temperatures hit 35.3°C in 2023, while the coldest dropped to 22.9°C in 2021.