Mexico Weather in September

Mexico Season in September: Fall

Playa Del Carmen in September

Mexico weather in September is characterized by high humidity. September has the most rainfall around the year on average, about 170 mm and 12 rainy days, as it is in the rainy season and the peak month of hurricanes. The average temperature is 19-30℃ (66.2-86℉) during the month. Traveling to the central inland of Mexico is recommended because the temperature and rainfall are moderate. If you have already decided to go there in September in 2025, then click our Best Private Mexico Tours 2025 & 2026.

 The warmest cities in Mexico in September:

Mexicali: 22-38℃ (71.6-100.4℉); Hermosillo: 24-37℃ (75.2-98.6℉); Puerto Vallarta: 23-34℃ (73.4-98.6℉).

 The coolest cities in Mexico in September:

Toluca: 8-21℃ (46.4-69.8℉); Puebla: 11-25℃ (51.8-77℉); San Luis Potosi: 12-25℃ (53.6-77℉).

Regional Weather in Mexico in September

Northwestern Mexico Weather in September

With the start of fall, the temperature in northwestern Mexico begins decreasing slightly, but it is still hot in most areas with the high temperature of more than 30℃ (86℉). The rainfall ranges from 0-100 mm and there are no more than 10 rainy days.

 September Weather of Major Northwestern Mexico Cities

Temp.	Rainfall  (mm)	Rainy Days	Humi- dity (%)	Sunrise / Sunset
Hermosillo
24 - 37℃ (75.2 - 98.6℉)	54	5	49	06:02:24 / 18:44:13
Juarez
17 - 31℃ (62.6 - 87.8℉)	64	6	83	06:58:57 / 19:25:39
Tijuana
17 - 28℃ (62.6 - 82.4℉)	5	1	62	06:23:49 / 19:10:52

Central Mexico Weather in September

The weather in central Mexico keeps warm and humid in September. The maximum temperature is usually under 30℃ (86℉), providing a comfortable feeling. Due to the active hurricanes, there is half a month of rain, but coastal cities are wetter than central inland, where the rainfall is about 200 mm more than the central inland. As for in central inland, the rainfall shows a decreasing trend, under 200 mm averagely, almost short showers. Overall, the central inland is a good travel destination in September.

 September Weather of Major Central Mexico Cities

Temp.	Rainfall  (mm)	Rainy Days	Humi- dity (%)	Sunrise / Sunset
Mexico City
12 - 22℃(53.6 - 71.6℉)	145	19	77	07:21:35 / 19:50:31
Puebla
11 - 25℃ (51.8 - 77℉)	192	18	82	07:18:07 / 19:46:34
Guadalajara
17 - 27℃ (62.6 - 80.6℉)	166	14	82	07:37:41 / 20:08:09

Southeastern Mexico Weather in September

The weather in southeastern Mexico is not as comfortable as imagined, because it is still hot and rainy this month. Coastal regions are exposed to hurricanes, which leads to higher rainfall. The rainfall in Cancun and Cozumel along the Caribbean Sea can reach up to around 200-250 mm during about half a month of rainy days. The temperature keeps high above 30℃ (86℉). 

 September Weather of Major Southeastern Mexico Cities

Temp.	Rainfall  (mm)	Rainy Days	Humi- dity (%)	Sunrise / Sunset
Cancun
25 - 33℃ (77 - 91.4℉)	225	14	77	06:31:21 / 19:02:31
Mérida
21 - 34℃ (69.8 - 93.2℉)	174	14	78	06:42:35 / 19:13:29
Cozumel
24 - 32℃ (75.2 - 89.6℉)	240	16	87	06:32:08 / 19:02:27

What to Pack to Visit Mexico in September

1. Breathable clothes are needed because it is hot in most regions, such as T-shirts, light pants, short pants and other summer clothes.

2. Warm clothes like jackets, pullovers and sweaters are essential in central Mexico, especially in the morning and nighttime.

3. Sun protection items are important because of the strong ultraviolet rays.

4. Raingears are necessary due to the rainy weather.     

Avoid Visiting Hurricane Zones

September is in the peak season of the hurricanes, so coastal regions along the Mexico Gulf, the Pacific and the Caribbean Sea, are easily susceptible to hurricanes. There are also possibilities for floods in some areas. In conclusion, it is necessary to avoid hurricane zones if you are going to Mexico in September.

Popular Destinations and Top Events in Mexico in September

Travel Rate: 

Central Mexico in September can be the best travel destination, with warm weather and moderate rain, making your trip safe and relaxing.

1. Cinco de Mayo

Cinco de Mayo is an important festival in Mexico falling on September 16th and to remember Miguel Hidalgo, the first leader of Mexican War of Independence. On that day, there are many celebrations around the whole country, including dances, fireworks and parades. It is a good chance to experience Mexican cultures and traditions.

2. Mexico City

Pedestrian Street in Mexico City

As the capital of Mexico, Mexico City has many historical sites. Apart from them, it is also a metropolitan with various relaxing activities. The open square Plaza Garibaldi is a must-to-go place at night, where you can enjoy street music and experience the lifestyles of the locals in restaurants and bars. 

3. Guanajuato

Protective town of San Miguel and the Sanctuary of Jesús Nazareno de Atotonilco
275 kilometers (170 miles) from Mexico City, the old town is listed as a World Cultural Heritage site. It used to guard the royal roadways and still maintains the stale from 250 years ago now. Tourists can see yards from colonial period. The sanctuary there was built in the 18th century with great Spanish Baroque styles. 

On September 29th, people in San Miguel celebrate the Angel’s Feast Day with parties, folk dances and sports races to commemorate the hero of the city.

University of Guanajuato

The University of Guanajuato is the first educational institution in Mexico. The main building in the university is white and blue, constructed in 1671-1696. Among various Baroque architectures of the local, buildings in the university have new classical styles, making it eye-catching.

Teatro Juarez

Built in 1873, the theater is in solemn and artistic styles. The appearance of the theater is solemn as Jesus paintings are carved in Greek stones outside. The inside is decorated with gold, making it splendid. Visitors are allowed to go inside from Tuesday to Sunday when there is no performance.

Mexico Weather by Month