San Juan weather in July
July in San Juan: sweltering, a little rain, with clean air — a good time to visit.
#9 of 12 months in San Juan · #419 of 604 destinations to visit in July · comfort 68/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
San Juan climate normals — July
| Daytime high | 32°C / 89°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 35°C / 95°F | |
| Rainfall | 72 mm / 2.8 in | 🌦 some rain |
| Rainy days | 15 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 24°C / 74°F | |
| Sunshine | 11.7 h/day | |
| Daylight | 13.1 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 49 | 🍃 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 July — FAQ
- Is July a good time to visit San Juan?
- July in San Juan: sweltering, a little rain, with clean air — a good time to visit. It ranks #9 of 12 months for San Juan on SeasonMap's comfort score (68/100).
- What is the weather like in San Juan in July?
- In July, San Juan averages a daily high of 31.8°C and a low of 25°C, with about 71.9 mm of rain over roughly 14.8 rainy days.
- What is the air quality in San Juan in July?
- San Juan has a mean US Air Quality Index of about 49 in July.