Acapulco weather in September
September in Acapulco: sweltering, soaked, with clean air — a good time to visit.
#12 of 12 months in Acapulco · #484 of 604 destinations to visit in September · comfort 63/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Acapulco climate normals — September
| Daytime high | 30°C / 86°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Feels like (high) | 37°C / 99°F | |
| Rainfall | 370 mm / 14.6 in | ⛈ soaked |
| Rainy days | 25 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | 25°C / 76°F | |
| Sunshine | 8.7 h/day | |
| Daylight | 12.2 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Acapulco?
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Acapulco in September — FAQ
- Is September a good time to visit Acapulco?
- September in Acapulco: sweltering, soaked, with clean air — a good time to visit. It ranks #12 of 12 months for Acapulco on SeasonMap's comfort score (63/100).
- What is the weather like in Acapulco in September?
- In September, Acapulco averages a daily high of 29.8°C and a low of 24.3°C, with about 369.7 mm of rain over roughly 24.6 rainy days.
- What is the air quality in Acapulco in September?
- Acapulco has a mean US Air Quality Index of about 41 in September.