Mexico City weather in September
In September, Mexico City has an average high of 22 °C71 °F and an average low of 11 °C52 °F, with about 148 mm5.8 in of precipitation. It is the 7th warmest month of the year and ranks 3rd for precipitation.
How September compares with other months
Compared with August, September is 0.7 °C1.2 °F cooler on average and drier by 5 mm0.2 in. Compared with October, September is 1 °C1.9 °F warmer on average and wetter by 84 mm3.3 in. Daylight lasts about 12.2 hours around the middle of the month. Average relative humidity is 82% and the average cloud amount 77%.
Is September a good time to visit Mexico City?
September is not among the most comfortable months by our comfort score: it is fairly wet (148 mm5.8 in). The most comfortable months in Mexico City are October–May.
What to wear in September
For Mexico City in September, pack light layers — T-shirts plus a light sweater or jacket, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Mexico City | 2271 | 1152 | 1485.8 |
| Iztapalapa | 2271 | 1152 | 1716.7 |
| Xico | 2271 | 1152 | 1716.7 |
| Zumpango | 2171 | 1151 | 1335.3 |
| Cuernavaca | 2578 | 1661 | 1837.2 |
| Toluca | 1966 | 947 | 1485.8 |
| Cuautla | 2781 | 1763 | 1736.8 |
| Pachuca de Soto | 2068 | 949 | 2007.9 |
| Puebla | 2271 | 1152 | 1696.6 |
Nearby places that are more than 1 °C1.8 °F warmer in September: Cuernavaca and Cuautla; cooler: Toluca and Pachuca de Soto.
Other months in Mexico City
- January20 °C69 °F / 5 °C42 °F
- February23 °C73 °F / 7 °C44 °F
- March25 °C78 °F / 8 °C46 °F
- April28 °C82 °F / 10 °C51 °F
- May28 °C82 °F / 12 °C53 °F
- June25 °C77 °F / 12 °C54 °F
- July23 °C74 °F / 12 °C53 °F
- August23 °C73 °F / 12 °C53 °F
- September22 °C71 °F / 11 °C52 °F
- October22 °C71 °F / 9 °C49 °F
- November21 °C70 °F / 7 °C45 °F
- December21 °C69 °F / 6 °C43 °F
Frequently asked questions
How warm is Mexico City in September?
In September the average high in Mexico City is 22 °C (71 °F) and the average low is 11 °C (52 °F).
Does it rain a lot in Mexico City in September?
On average about 148 mm (5.8 in) of precipitation falls in September; it ranks 3rd of the 12 months.
Is September the warmest month in Mexico City?
No. The warmest month in Mexico City is April, with an average high of 28 °C (82 °F). The coldest month is January, with an average low of 5 °C (42 °F).
How long is the day in Mexico City in September?
In the middle of September the day in Mexico City lasts about 12.2 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Mexico City in September?
The average relative humidity in September is about 82%. This is a long-term average for the whole day.
How cloudy is Mexico City in September?
On average about 77% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 2,627 m, while Mexico City lies at about 2,240 m. Temperatures on this page were therefore adjusted by +2.5 °C4.5 °F using the standard lapse rate of 6.5 °C per 1,000 m.