Mexico City Weather in September
In September, Mexico City averages a high of 23°C (74°F) and a low of 12°C (53°F), from 53 years of daily records (1971–2025).
23°C
Average high
74°F
12°C
Average low
53°F
31°C
Record high
87°F · September 9, 1992
2°C
Record low
35°F · September 28, 1994
What September Is Like in Mexico City
- 8 of the 10 warmest Septembers on record in Mexico City have come since 2011.
- The September heat record, 31°C (87°F) on September 9, 1992, has stood for 33 years.
- September in Mexico City has become 1.3°C (2.4°F) warmer on average: the 2011–2025 average against 1970–1989.
- The coldest September reading, 2°C (35°F) on September 28, 1994, has not been matched in 31 years.
At least 1 mm of rain falls on 36% of September days, and the month averages 112 mm in total.
Warmest: 1987 (27.5°C)Latest: 2025 (23.9°C)10-year averageLong-run average (23.5°C)
Look Up a Day in September
See the weather in Mexico City on any September date, year by year.
Source: NOAA GHCN-Daily, Gran Canal Km. 06+250 (1978–2012); Cincel 42 (1971–1988); Mexico City (1993–2025); Rodano 14 (Cfe) (1975–1996); Tacuba 7 (1971–1976). Averages cover 1971–2025. How we compute this