September · Mexico
Best time to visit San Cristóbal de las Casas in September Weather, crowds & prices
Weather in San Cristóbal de las Casas in September
Average temperature 20°C, 237 mm of rain, about 20 days with 6+ hours of sunshine and 84% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
6.0/10
Ranked #12 of 12 months
- Avg temp
- 20°C
- Rainfall
- 237 mm
- Humidity
- 84%
- Days with 6h+ sun
- 20
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in San Cristóbal de las Casas scores 6.0/10 for sightseeing and cultural travel - ranked #12 of 12. Expect around 20°C, 237 mm of rain, and roughly 20 days with 6+ hours of sunshine this month.
San Cristóbal's colonial lanes and Maya villages sit in the cool highlands of Chiapas.
September in San Cristóbal de las Casas — workable with trade-offs
At 20°C (69°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
This is the year's wettest stretch at 237 mm, but with about 20 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 6/10 on the same scale — 12th of 12 months, versus 9.9/10 for the best month here.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
Budget for low-season pricing, and crowds are light for this destination.
If your dates are flexible, March is materially better in San Cristóbal de las Casas — 3.9 points higher on the same scale.
Frequently asked
- What is the weather like in San Cristóbal de las Casas in September?
- In September, San Cristóbal de las Casas averages 20°C, 237 mm of rain, and about 20 days with 6+ hours of sunshine. Its climate-comfort score is 6.0/10.
- Is September a good time to visit San Cristóbal de las Casas?
- September earns a 6.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in San Cristóbal de las Casas in September?
- Expect about 237 mm of rain in September. Average humidity is 84% and there are about 20 days with 6+ hours of sunshine.
Curated in San Cristóbal de las Casas
Tickets & experiences
Things to do in San Cristóbal de las Casas
San Cristóbal de las Casas, Mexico. Live activities and tours from GetYourGuide, matched to this destination.