Santa Teresa weather in September
September in Santa Teresa: warm, soaked, with clean air — fine if you can take 29 rainy days.
#10 of 12 months in Santa Teresa · #733 of 897 destinations to visit in September · comfort 66/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
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Santa Teresa climate normals — September
| Daytime high | 28°C / 82°F | 🌤 warm |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Rainfall | 308 mm / 12.1 in | ⛈ soaked |
| Rainy days | 29 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 8.9 h/day | |
| Daylight | 12.2 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 26 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Santa Teresa in September — FAQ
- Is September a good time to visit Santa Teresa?
- September in Santa Teresa: warm, soaked, with clean air — fine if you can take 29 rainy days. It ranks #10 of 12 months for Santa Teresa on SeasonMap's comfort score (66/100).
- What is the weather like in Santa Teresa in September?
- In September, Santa Teresa averages a daily high of 28°C and a low of 24.8°C, with about 308.4 mm of rain over roughly 28.8 rainy days.
- What is the air quality in Santa Teresa in September?
- Santa Teresa has a mean US Air Quality Index of about 26 in September.