Puerto Viejo weather in September
September in Puerto Viejo: warm, soaked, with clean air — fine if you can take 28 rainy days.
#5 of 12 months in Puerto Viejo · #601 of 897 destinations to visit in September · comfort 75/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Puerto Viejo in September
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Puerto Viejo climate normals — September
| Daytime high | 28°C / 83°F | 🌤 warm |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Rainfall | 251 mm / 9.9 in | ⛈ soaked |
| Rainy days | 28 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 9.1 h/day | |
| Daylight | 12.2 h | |
| Wind | 7 km/h / 5 mph | |
| Air quality (US AQI) | 25 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Puerto Viejo in September — FAQ
- Is September a good time to visit Puerto Viejo?
- September in Puerto Viejo: warm, soaked, with clean air — fine if you can take 28 rainy days. It ranks #5 of 12 months for Puerto Viejo on SeasonMap's comfort score (75/100).
- What is the weather like in Puerto Viejo in September?
- In September, Puerto Viejo averages a daily high of 28.2°C and a low of 22.9°C, with about 250.6 mm of rain over roughly 28 rainy days.
- What is the air quality in Puerto Viejo in September?
- Puerto Viejo has a mean US Air Quality Index of about 25 in September.