Potosí weather in September
September in Potosí: cool, dry, with clean air — one of the best months to visit.
#1 of 12 months in Potosí · #204 of 604 destinations to visit in September · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Potosí climate normals — September
| Daytime high | 17°C / 62°F | 🙂 cool |
|---|---|---|
| Nighttime low | 1°C / 34°F | |
| Feels like (high) | 14°C / 57°F | |
| Rainfall | 27 mm / 1.1 in | ☀️ dry |
| Rainy days | 7 days | |
| Humidity | 33% | 🌵 dry |
| Dew point | -12°C / 11°F | |
| Sunshine | 10.9 h/day | |
| Daylight | 12 h | |
| Wind | 16 km/h / 10 mph | |
| Snowfall | 0.1 cm / 0 in | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Potosí?
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Potosí in September — FAQ
- Is September a good time to visit Potosí?
- September in Potosí: cool, dry, with clean air — one of the best months to visit. It ranks #1 of 12 months for Potosí on SeasonMap's comfort score (85/100).
- What is the weather like in Potosí in September?
- In September, Potosí averages a daily high of 16.9°C and a low of 1.1°C, with about 26.9 mm of rain over roughly 7.2 rainy days.
- What is the air quality in Potosí in September?
- Potosí has a mean US Air Quality Index of about 41 in September.