SeasonMapZihuatanejo weather in September
Mexico
September in Zihuatanejo: sweltering, soaked, with clean air — a gamble, with 23 rainy days.
#12 of 12 months in Zihuatanejo · #1127 of 1383 destinations to visit in September · comfort 60/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Zihuatanejo in September
Other months in Zihuatanejo
Zihuatanejo's forum rates the November-through-March stretch as reliably excellent, and March specifically as sunny, breezy and essentially rain-free, high 80s°F by day cooling to the mid-to-high 70s in the evening. Regulars describe day after day of clear, near-identical good weather, with ocean temperatures staying warm enough for comfortable swimming throughout.
Add your own note from Zihuatanejo's card on the map.
Zihuatanejo climate normals — September
| Daytime high | 32°C / 90°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 38°C / 100°F | |
| Sea temperature | 31°C / 88°F | ♨️ bath-warm |
| Rainfall | 310 mm / 12.2 in | ⛈ soaked |
| Rainy days | 23 days | |
| Humidity | 84% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 9.1 h/day | |
| Daylight | 12.2 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Zihuatanejo in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Quietschool holidays in 2 of the markets that fill it, one of its worst months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Zihuatanejo's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherZihuatanejo's weather peaks February–April.
September coincides with Pacific hurricane season.
Best weatherFair weatherToughest weather
What's on in Zihuatanejo in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Pacific hurricane season
15 May – 30 NovThe eastern Pacific season opens in mid-May and runs to the end of November, with September the month to watch on this stretch of coast. Most systems pass offshore and leave rain behind. Source ↗
- Season
Rainy season
15 Jun – 15 OctMonsoonStorms at night and in the late afternoon, hills behind the bay properly green, and half the visitor businesses shut through September. It is the cheapest and emptiest the town gets.
- Nature
Olive ridley nesting
1 Aug – 15 Dec · usuallyTurtle nestingOlive ridleys nest on Playa Larga and Barra de Potosi through the autumn, and the camps hold hatchling releases at dusk most evenings in the season.
- Season
Wet season
MonsoonRisk23 rainy days and about 310 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Zihuatanejo — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Zihuatanejo?
Zihuatanejo in September — FAQ
- Is September a good time to visit Zihuatanejo?
- September in Zihuatanejo: sweltering, soaked, with clean air — a gamble, with 23 rainy days. It ranks #12 of 12 months for Zihuatanejo on SeasonMap's comfort score (60/100).
- What is the weather like in Zihuatanejo in September?
- In September, Zihuatanejo averages a daily high of 32.4°C and a low of 25°C, with about 309.7 mm of rain over roughly 23 rainy days.
- What is the air quality in Zihuatanejo in September?
- Zihuatanejo has a mean US Air Quality Index of about 36 in September.
Other months in Zihuatanejo
Compare Zihuatanejo in September
Warmer or cooler than Zihuatanejo in September
Similar destinations in North America — September
Within 300 km: Morelia's Summer rains on 10 Jun – 30 Sep.