September · Mexico
Best time to visit Sumidero Canyon in September Weather, crowds & prices
Weather in Sumidero Canyon in September
Average temperature 22°C, 302 mm of rain, about 20 days with 6+ hours of sunshine and 88% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
6.4/10
Ranked #10 of 12 months
- Avg temp
- 22°C
- Rainfall
- 302 mm
- Humidity
- 88%
- Days with 6h+ sun
- 20
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Sumidero Canyon scores 6.4/10 for nature and wildlife travel - ranked #10 of 12. Expect around 22°C, 302 mm of rain, and roughly 20 days with 6+ hours of sunshine this month.
Sumidero Canyon cuts sheer cliffs above the Grijalva-boat rides past waterfalls and canyon walls. Best window: the drier months outside peak monsoon.
September in Sumidero Canyon: mixed conditions, plan around the weather
Trail conditions at 22°C (72°F) favour early starts and shaded routes in September; midday is for water breaks, not for exposed climbs.
This is the year's wettest stretch at 302 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 6.4/10 on the same scale — 10th of 12 months, versus 9.2/10 for the best month here.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, March is materially better in Sumidero Canyon — 2.8 points higher on the same scale.
Frequently asked
- What is the weather like in Sumidero Canyon in September?
- In September, Sumidero Canyon averages 22°C, 302 mm of rain, and about 20 days with 6+ hours of sunshine. Its climate-comfort score is 6.4/10.
- Is September a good time to visit Sumidero Canyon?
- September earns a 6.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Sumidero Canyon in September?
- Expect about 302 mm of rain in September. Average humidity is 88% and there are about 20 days with 6+ hours of sunshine.
Curated in Sumidero Canyon
Tickets & experiences
Things to do in Sumidero Canyon
Sumidero Canyon, Mexico. Live activities and tours from GetYourGuide, matched to this destination.