SeasonMapHuatulco weather in September
Mexico
September in Huatulco: sweltering, soaked, with clean air — a gamble, with 26 rainy days.
#12 of 12 months in Huatulco · #1157 of 1383 destinations to visit in September · comfort 57/100 (tier D)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Huatulco in September
Other months in Huatulco
Huatulco's forum calls February about as reliable as Mexico's coast gets — one long-time visitor logged years of early-February trips with only a handful of rainy days each time, and regulars rate it the safest bet on the coast for hot, sunny, dry weather. The water stays warm from December through February too, so swimming is comfortable start to finish.
Add your own note from Huatulco's card on the map.
Huatulco climate normals — September
| Daytime high | 31°C / 88°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Feels like (high) | 37°C / 99°F | |
| Sea temperature | 31°C / 88°F | ♨️ bath-warm |
| Rainfall | 477 mm / 18.8 in | ⛈ soaked |
| Rainy days | 26 days | |
| Humidity | 88% | 💦 very humid |
| Dew point | 22°C / 72°F | |
| Sunshine | 8.7 h/day | |
| Daylight | 12.2 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 22 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Huatulco 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 Huatulco'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 weatherHuatulco's best weather comes in February, March and December — separate windows, not one continuous season.
September coincides with Pacific hurricane season.
Best weatherFair weatherToughest weather
What's on in Huatulco 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 a fortnight before the Atlantic one. Storms here usually track away from the coast, but the ones that don't come ashore fast on this stretch of Oaxaca, and September is the peak. Source ↗
- Nature
Olive ridley nesting
1 Jul – 15 Dec · usuallyTurtle nestingOlive ridleys nest along the beaches west of the bays through the wet half of the year, and the camps run hatchling releases at dusk from about September. The big arribadas happen further up the coast.
- Season
Wet season
MonsoonRisk26 rainy days and about 477 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 Huatulco — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Huatulco?
Huatulco in September — FAQ
- Is September a good time to visit Huatulco?
- September in Huatulco: sweltering, soaked, with clean air — a gamble, with 26 rainy days. It ranks #12 of 12 months for Huatulco on SeasonMap's comfort score (57/100).
- What is the weather like in Huatulco in September?
- In September, Huatulco averages a daily high of 31.2°C and a low of 22.8°C, with about 477.3 mm of rain over roughly 25.6 rainy days.
- What is the air quality in Huatulco in September?
- Huatulco has a mean US Air Quality Index of about 22 in September.
Other months in Huatulco
Compare Huatulco in September
Warmer or cooler than Huatulco in September
Similar destinations in North America — September
Within 300 km: Puerto Escondido's Olive ridley arribadas around 1 Jul – 15 Dec, and Oaxaca's Independence Day on 15–16 Sep.