San Juan weather in April
April in San Juan: hot, a little rain, with clean air — a great time to visit.
#5 of 12 months in San Juan · #397 of 604 destinations to visit in April · comfort 75/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
San Juan climate normals — April
| Daytime high | 30°C / 87°F | 🥵 hot |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Feels like (high) | 33°C / 91°F | |
| Rainfall | 44 mm / 1.7 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 75% | 💧 humid |
| Dew point | 20°C / 68°F | |
| Sunshine | 11.4 h/day | |
| Daylight | 12.6 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 33 | 🍃 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 April — FAQ
- Is April a good time to visit San Juan?
- April in San Juan: hot, a little rain, with clean air — a great time to visit. It ranks #5 of 12 months for San Juan on SeasonMap's comfort score (75/100).
- What is the weather like in San Juan in April?
- In April, San Juan averages a daily high of 30.4°C and a low of 22.5°C, with about 43.7 mm of rain over roughly 7.8 rainy days.
- What is the air quality in San Juan in April?
- San Juan has a mean US Air Quality Index of about 33 in April.