Mérida weather in September
September in Mérida: sweltering, rainy, with clean air — a good time to visit.
#7 of 12 months in Mérida · #460 of 604 destinations to visit in September · comfort 66/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Mérida climate normals — September
| Daytime high | 33°C / 91°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Feels like (high) | 39°C / 102°F | |
| Rainfall | 92 mm / 3.6 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 11 h/day | |
| Daylight | 12.3 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Mérida in September — FAQ
- Is September a good time to visit Mérida?
- September in Mérida: sweltering, rainy, with clean air — a good time to visit. It ranks #7 of 12 months for Mérida on SeasonMap's comfort score (66/100).
- What is the weather like in Mérida in September?
- In September, Mérida averages a daily high of 33°C and a low of 24.4°C, with about 91.8 mm of rain over roughly 17 rainy days.
- What is the air quality in Mérida in September?
- Mérida has a mean US Air Quality Index of about 44 in September.