El Tunco weather in September
September in El Tunco: sweltering, soaked, with very humid — a great time to visit.
#10 of 12 months in El Tunco · #413 of 604 destinations to visit in September · comfort 71/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
El Tunco climate normals — September
| Daytime high | 29°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 277 mm / 10.9 in | ⛈ soaked |
| Rainy days | 28 days | |
| Humidity | 87% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 10 h/day | |
| Daylight | 12.2 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 51 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is El Tunco?
Loading map…
El Tunco in September — FAQ
- Is September a good time to visit El Tunco?
- September in El Tunco: sweltering, soaked, with very humid — a great time to visit. It ranks #10 of 12 months for El Tunco on SeasonMap's comfort score (71/100).
- What is the weather like in El Tunco in September?
- In September, El Tunco averages a daily high of 29.3°C and a low of 24°C, with about 277.1 mm of rain over roughly 28.2 rainy days.
- What is the air quality in El Tunco in September?
- El Tunco has a mean US Air Quality Index of about 51 in September.