San Juan weather in June
June in San Juan: sweltering, a little rain, with clean air — a good time to visit.
#8 of 12 months in San Juan · #447 of 604 destinations to visit in June · comfort 69/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
San Juan climate normals — June
| Daytime high | 32°C / 89°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 76°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 53 mm / 2.1 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 12.1 h/day | |
| Daylight | 13.2 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is San Juan?
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San Juan in June — FAQ
- Is June a good time to visit San Juan?
- June in San Juan: sweltering, a little rain, with clean air — a good time to visit. It ranks #8 of 12 months for San Juan on SeasonMap's comfort score (69/100).
- What is the weather like in San Juan in June?
- In June, San Juan averages a daily high of 31.9°C and a low of 24.7°C, with about 53.4 mm of rain over roughly 11 rainy days.
- What is the air quality in San Juan in June?
- San Juan has a mean US Air Quality Index of about 38 in June.