Mexico Oaxaca Weather in September — Climate Guide
September in Oaxaca is moderate
Oaxaca Weather in September — Quick Answer
As of 2026- Avg temp
- 27° / 14°
- Rainfall
- 130mm · 17 days
- Crowds
- Quiet
As of 2026, Oaxaca in September averages a high of 27°C and low of 14°C with 130mm of rain over about 17 days. The rainiest month — warm days around 27°C with the heaviest storms of the year. Light clothing, a sturdy umbrella or rain jacket, and waterproof shoes. Mornings can still be sunny — hat and SPF; a layer for evenings.
September is moderate for Oaxaca.
September is Oaxaca's rainiest month — warm at around 27°C but with the heaviest and most frequent storms, totaling about 130mm over some 17 rainy days.
Mornings still offer windows of sun, but afternoons and evenings see reliable downpours, so plan flexibly: early sightseeing, indoor afternoons (markets, museum, cooking class, mezcalerías). The landscapes are at their lushest.
Travel score
Oaxaca September Weather Stats
Avg High
27°C
Avg Low
14°C
Rainy Days
17
130mm total
Sunshine
5.5h
Daily avg
Humidity
70%
muggy
UV Index
8
Very high
Wind
7 km/h
Gusts 16
Crowds
Quiet
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
26 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
28°C
Nighttime
15°C
Humidity and wind affect how the actual temperature feels.
Wind
7 km/h
Max gust 16 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Quiet low season — fewest crowds, low prices
- Independence Day celebrations (Sep 15-16)
- Lush green landscapes
- Sunny morning windows
Cons
- Rainiest month of the year (130mm)
- Heaviest, most frequent storms
- Hierve el Agua access often affected
- Humid (70%)
September Events & Festivals
- Rainiest month of the year
- Mexican Independence Day (Sep 15-16) — celebrations & fireworks
- Quiet low season — lowest crowds
- Lush green peak
Oaxaca in September — Full Picture
September is Oaxaca's rainiest month — warm at around 27°C but with the heaviest and most frequent storms, totaling about 130mm over some 17 rainy days.
Mornings still offer windows of sun, but afternoons and evenings see reliable downpours, so plan flexibly: early sightseeing, indoor afternoons (markets, museum, cooking class, mezcalerías). The landscapes are at their lushest.
Mexican Independence Day (Sep 15-16) brings the festive 'Grito' celebrations, fireworks, music, and food across the city — a lively national holiday worth catching if you're there.
It's a quiet, low-priced month otherwise, with the fewest tourists. The downside is the rain and a higher chance the Hierve el Agua route is affected, so keep day-trip plans adaptable.
What to Wear & What to Pack
The rainiest month — warm days around 27°C with the heaviest storms of the year. Light clothing, a sturdy umbrella or rain jacket, and waterproof shoes. Mornings can still be sunny — hat and SPF; a layer for evenings.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
31.7°C
12.7°C
5/mo
Summer (Jun·Jul·Aug)
28°C
14°C
15.7/mo
Autumn (Sep·Oct·Nov)
Current27.3°C
12°C
9.7/mo
Winter (Dec·Jan·Feb)
28.3°C
8.7°C
1/mo
Oaxaca Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 28° | 8° | 1d·5mm | 8h | 50% | 8 | Busy | Peak |
| February (Best) | 30° | 9° | 1d·5mm | 8.5h | 45% | 9 | Moderate | Shoulder |
| March (Best) | 32° | 11° | 2d·10mm | 8.5h | 45% | 10 | Moderate | Shoulder |
| 32° | 13° | 4d·25mm | 8h | 50% | 10 | Busy | Peak | |
| 31° | 14° | 9d·60mm | 7h | 55% | 10 | Quiet | Low season | |
| 28° | 14° | 16d·110mm | 5.5h | 65% | 9 | Quiet | Low season | |
| 28° | 14° | 15d·95mm | 6h | 65% | 9 | Busy | Peak | |
| 28° | 14° | 16d·110mm | 6h | 65% | 9 | Moderate | Shoulder | |
| 27° | 14° | 17d·130mm | 5.5h | 70% | 8 | Quiet | Low season | |
| October (Best) | 27° | 12° | 9d·60mm | 6.5h | 60% | 8 | Very busy | Peak |
| November (Best) | 28° | 10° | 3d·15mm | 8h | 50% | 7 | Busy | Peak |
| December (Best) | 27° | 9° | 1d·5mm | 8h | 50% | 7 | Very busy | Peak |
View Other Months
Oaxaca September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Oaxaca?
Oaxaca in September is moderate. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in Oaxaca in September?
Oaxaca September averages a high of 27°C and a low of 14°C.
Does it rain much in Oaxaca in September?
Oaxaca September averages 130mm of rainfall over about 17 rainy days.
What should I wear in Oaxaca in September?
The rainiest month — warm days around 27°C with the heaviest storms of the year. Light clothing, a sturdy umbrella or rain jacket, and waterproof shoes. Mornings can still be sunny — hat and SPF; a layer for evenings.
What time are sunrise and sunset in Oaxaca in September?
Oaxaca September sunrise is 06:15 and sunset is 18:35, with 12h 20min of daylight.
What's the air quality like in Oaxaca in September?
Oaxaca September air quality (AQI) averages 38, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Oaxaca in September?
In September, Oaxaca is great for Independence Day 'Grito' celebrations (Sep 15-16), Morning sightseeing before the rain, Markets and indoor museum.
Is September peak season in Oaxaca?
Oaxaca September crowds are quiet and prices are low season. You can travel relatively comfortably without long queues.
Best Months to Visit Oaxaca
View Other Months
Planning a September trip to Oaxaca?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.