Antofagasta weather in September
September in Antofagasta: nice, dry, with very humid — an excellent time to visit.
#5 of 12 months in Antofagasta · #37 of 897 destinations to visit in September · comfort 94/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Antofagasta in September
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Antofagasta climate normals — September
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 56°F | |
| Rainfall | 1 mm / 0.1 in | ☀️ dry |
| Rainy days | 0 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 11 h/day | |
| Daylight | 12 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 51 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Antofagasta in September — FAQ
- Is September a good time to visit Antofagasta?
- September in Antofagasta: nice, dry, with very humid — an excellent time to visit. It ranks #5 of 12 months for Antofagasta on SeasonMap's comfort score (94/100).
- What is the weather like in Antofagasta in September?
- In September, Antofagasta averages a daily high of 20.1°C and a low of 13.1°C, with about 1.3 mm of rain over roughly 0 rainy days.
- What is the air quality in Antofagasta in September?
- Antofagasta has a mean US Air Quality Index of about 51 in September.