Weather in Mexico City in September 2025
- September is usually the wettest month of the year in Mexico City;
Average weather
Average temperature in Mexico City in September
The temperature in September is +26°C on average, with a range between a maximum of +28°C during the day and a minimum of +9°C at night.
The average maximum temperature goes up 11% by the end of the month, compared with the beginning of the month, from +24°C to +26°C.
Is Mexico City warm or cold in September?
Mexico City is typically mild in September.
Maximum temperatures go down compared to the previous month from +23°C to +22°C. The minimum temperature also goes up from +13°C to +13°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
September is one of the coolest months in Mexico City, here is the comparison with other months:
Climate in Mexico City in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +23°C | +22°C | +22°C | ||||
| Min. temperature | ||||||
| +8°C | +3°C | 0°C | ||||
| Max. temperature | ||||||
| +27°C | +28°C | +28°C | ||||
| Rainfall | ||||||
| 194 mm | 157 mm | 77 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 67% | 68% | 64% | ||||
| Air pressure | ||||||
| 1023 HPa | 1022 HPa | 1022 HPa | ||||
| Sunny days | ||||||
| 0 | 1 | 4 | ||||
| Cloudy days | ||||||
| 1 | 3 | 8 | ||||
| Rainy days | ||||||
| 20 | 19 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September typically has worse weather conditions compared to August. It’s getting colder in September. From +23°C in the day, the average maximum temperature lowers to +22°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 194 mm to 157 mm. Humidity rises from 67% to 68%. The average wind speed doesn’t change much during September, staying around 2 m/s. The good news is there are likely to be more sunny days in September, from 0 to 1.
But maybe it is worth considering traveling in October as the weather gets better.
Wind
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Mexico City is gradually increasing during September, going from 2 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Mexico City?
Climate Change over Years
The climate in Mexico City in September has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+21°C) and the highest in 2020 (+25°C). The driest year was 1996 with only 697 mm of rainfall, and the wettest year was 2021 with 1829 mm.
FAQ
Is September a good time to visit Mexico City?
Can you sunbathe in Mexico City in September?
Is Mexico City rainy in September?
Is it sunny in Mexico City in September?
Other cities in Mexico
Monthly weather in Mexico City
Source of the data
For this page, we’ve looked at the typical weather in Mexico City, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.