Oaxaca weather in September
September in Oaxaca: warm, soaked, with clean air — an excellent time to visit.
#12 of 12 months in Oaxaca · #290 of 604 destinations to visit in September · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Oaxaca climate normals — September
| Daytime high | 25°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 180 mm / 7.1 in | ⛈ soaked |
| Rainy days | 20 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 15°C / 59°F | |
| Sunshine | 8.8 h/day | |
| Daylight | 12.2 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 28 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Oaxaca?
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Oaxaca in September — FAQ
- Is September a good time to visit Oaxaca?
- September in Oaxaca: warm, soaked, with clean air — an excellent time to visit. It ranks #12 of 12 months for Oaxaca on SeasonMap's comfort score (81/100).
- What is the weather like in Oaxaca in September?
- In September, Oaxaca averages a daily high of 24.5°C and a low of 15.5°C, with about 179.6 mm of rain over roughly 19.8 rainy days.
- What is the air quality in Oaxaca in September?
- Oaxaca has a mean US Air Quality Index of about 28 in September.