Mexico City Weather in September
Thinking of visiting Mexico City in September? Expect high temperatures reaching 23°C (73°F) during the day, dropping to 12°C (54°F) at night. Heavy showers are common during the rainy season.
Rainfall in Mexico City in September
Mexico City is in the rainy season in September, with rain on around 17 days and an average of 201 mm (7.9 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Mexico City in September
Daytime temperatures in Mexico City reach 23°C (73°F) in September, dropping to 12°C (54°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 12°C (54°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Mexico City in September
The area experiences a moderate amount of sunshine, with approximately 150 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Mexico City. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Mexico City's climate page.
Mexico City Temperature in September
Min Temperature
12°C (54°F)
Max Temperature
23°C (73°F)
Chance of Rain
55%
Precipitation
201 mm (7.9 in)
Rainy days
17 days
Humidity
69%
Sunshine
150 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Mexico City typically stay consistent throughout September, with daily highs averaging around 23°C (73°F). Nights are cool, with lows around 12°C (54°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Mexico City in September
Browse day-by-day weather records for Mexico City spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mexico City historical weather extremes in September
Based on weather observations in Mexico City between 1986 and 2025, these are the recorded extremes during September.
- On September 14, 2010, temperatures climbed to 31°C (88°F), marking the warmest September day on record.
- The coldest September day was on September 28, 1991, with a maximum of 15°C (59°F).
- The lowest overnight temperature recorded in September was 2°C (36°F) (September 30, 2010).
Best Places in Mexico in September
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in September →
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What to Wear in Mexico City in September
For Mexico City in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Mexico City in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Mexico City's climate page.
Temperature Rainfall Sunshine Humidity
See the full Mexico City climate overview or explore weather in Mexico.
