September · Mexico
Best time to visit Mexico City in September Weather, crowds & prices
Weather in Mexico City in September
Average temperature 15°C, 132 mm of rain, about 21 days with 6+ hours of sunshine and 79% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.3/10
Ranked #10 of 12 months
- Avg temp
- 15°C
- Rainfall
- 132 mm
- Humidity
- 79%
- Days with 6h+ sun
- 21
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Mexico City scores 7.3/10 for sightseeing and cultural travel - ranked #10 of 12. Expect around 15°C, 132 mm of rain, and roughly 21 days with 6+ hours of sunshine this month.
Mexico City layers Aztec ruins, colonial churches, and modern museums across a highland basin.
September in Mexico City: strong conditions, 10th of 12
Temperatures hover around 15°C (59°F) — the kind of month where neither heat nor cold forces the schedule.
132 mm of rain makes this a wet month here, though with about 21 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.3/10 on the same scale — 10th of 12 months, versus 9.9/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, March is materially better in Mexico City — 2.6 points higher on the same scale.
Frequently asked
- What is the weather like in Mexico City in September?
- In September, Mexico City averages 15°C, 132 mm of rain, and about 21 days with 6+ hours of sunshine. Its climate-comfort score is 7.3/10.
- Is September a good time to visit Mexico City?
- September earns a 7.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Mexico City in September?
- Expect about 132 mm of rain in September. Average humidity is 79% and there are about 21 days with 6+ hours of sunshine.
Curated in Mexico City
Tickets & experiences
Things to do in Mexico City
Mexico City, Mexico. Live activities and tours from GetYourGuide, matched to this destination.