What to expect in Mexico City in September
September is a mixed month in Mexico City. You get 21° / 12°, but manageable crowds at the big attractions. Worth it for the right traveller.
Mexico City weather in September
Typical conditions in Mexico City during September, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 21°C 70°F |
|---|---|
| Average low | 12°C 54°F |
| Rainfall | Wet 140/100 |
| Total rainfall | 145 mm5.7 in |
| Rainy days | 19 |
| Daylight | 12 h 16 min |
| How it feels | Mild — layers weather |
Average highs sit around 21°C with lows near 12°C. Expect a fair amount of rain, so plan indoor backups.
Crowds & demand
Crowd levels are Moderate for Mexico City — manageable crowds at the big attractions.
Prices & value
This month counts as shoulder season: prices close to the yearly average.
What to pack
Layers you can shed: 21°C by day and about 12°C after dark is a two-jacket kind of month. Add a compact rain shell and shoes you do not mind soaking; this is one of the wetter months.
What it costs
Costs in September sit around the yearly average for Mexico City — neither a bargain nor a squeeze. Booking a few weeks out is usually enough. Compared with the most expensive month of the year, you are looking at roughly 28% less.
Who this month suits
- Anyone travelling on a budget
- People who would rather have space than perfect conditions
- Visitors who want to catch a festival
Events & what’s on
Look out for Independence Day (El Grito) while you’re there.
- Independence Day (El Grito) — The president reenacts Mexico's independence cry from the National Palace balcony over the Zócalo each September 15th.
Mexico City in September compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| July | 21° / 12° | Moderate | $$ | 50 |
| August | 21° / 12° | Moderate | $ | 52 |
| September · This month | 21° / 12° | Moderate | $$ | 53 |
| October | 21° / 10° | Moderate | $$ | 61 |
| November | 21° / 8° | Moderate | $$ | 60 |
These months score higher for Mexico City on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in September
If the destination is negotiable but the month is not, these places are at their best in September.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
