San Juan weather in March
March in San Juan: hot, a little rain, with clean air — a great time to visit.
#3 of 12 months in San Juan · #275 of 604 destinations to visit in March · comfort 77/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
San Juan climate normals — March
| Daytime high | 29°C / 85°F | 🥵 hot |
|---|---|---|
| Nighttime low | 22°C / 71°F | |
| Feels like (high) | 31°C / 88°F | |
| Rainfall | 31 mm / 1.2 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 20°C / 67°F | |
| Sunshine | 11 h/day | |
| Daylight | 12 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 32 | 🍃 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 March — FAQ
- Is March a good time to visit San Juan?
- March in San Juan: hot, a little rain, with clean air — a great time to visit. It ranks #3 of 12 months for San Juan on SeasonMap's comfort score (77/100).
- What is the weather like in San Juan in March?
- In March, San Juan averages a daily high of 29.4°C and a low of 21.6°C, with about 30.6 mm of rain over roughly 10.2 rainy days.
- What is the air quality in San Juan in March?
- San Juan has a mean US Air Quality Index of about 32 in March.