September weather forecast and climate
Mexico City, Mexico

A tower holding the golden sculpture of the historical Angel of Independence in a roundabout in Mexico City, Mexico, with the city buildings
A tower holding the golden sculpture of the historical Angel of Independence in a roundabout in Mexico City, Mexico, with the city buildings
The first month of the autumn, September, is still a warm month in Mexico City, Mexico, with average temperature varying between 12.7°C (54.9°F) and 23.3°C (73.9°F).

Temperature

The average high-temperature, is 23.3°C (73.9°F), while the average low-temperature is 12.7°C (54.9°F).

Humidity

The most humid month is September, with an average relative humidity of 70%.

Rainfall

In September, in Mexico City, the rain falls for 18.2 days. Throughout September, 139.8mm (5.5") of precipitation is accumulated. In Mexico City, during the entire year, the rain falls for 124.9 days and collects up to 846.2mm (33.3") of precipitation.

Daylight

The average length of the day in September is 12.2h.

Sunshine

September has the least sunshine of the year, with an average of 5.2h of sunshine.

UV index

Months with the highest UV index are March through September, with an average UV index of 12.

What is the temperature in September in Mexico City?

The average high-temperature, in September, is 23.3°C (73.9°F), while the average low-temperature is 12.7°C (54.9°F).

What is the most humid month in Mexico City?

The most humid month in Mexico City, Mexico, is September, with an average relative humidity of 70%.

What is the average humidity in September in Mexico City?

The average relative humidity in September in Mexico City, Mexico, is 70%.

How many days does it rain in September in Mexico City?

In Mexico City, Mexico, in September, during 18.2 rainfall days, 139.8mm (5.5") of precipitation is typically accumulated.

How many hours of daylight does Mexico City have in September?

In Mexico City, Mexico, the average length of the day in September is 12.2h.

What is the month with the least sunshine in Mexico City?

With an average of 5.2h of sunshine, September has the least sunshine of the year in Mexico City.

How many hours of sunshine does Mexico City have in September?

In Mexico City, Mexico, the average sunshine in September is 5.2h.

What are the months with the highest UV index in Mexico City?

Months with the highest UV index in Mexico City are March through September, with an average UV index of 12.

What is the UV index intensity in September in Mexico City?

The average UV index in September in Mexico City, Mexico, is 12.
Average temperature in September - Mexico City, Mexico
  • Average high temperature in September: 23.3°C

Warmest months (with the highest average high temperature) are April and May (26.8°C).
The month with the lowest average high temperature is January (21.7°C).

  • Average low temperature in September: 12.7°C

The month with the highest average low temperature is June (13.5°C).
The coldest month (with the lowest average low temperature) is January (7.4°C).

Average humidity in September - Mexico City, Mexico
  • Average humidity in September: 70%

The month with the highest relative humidity is September (70%).
The month with the lowest relative humidity is March (41%).

Average rainfall in September - Mexico City, Mexico
  • Average rainfall in September: 139.8mm

The wettest month (with the highest rainfall) is July (189.5mm).
The driest month (with the lowest rainfall) is February (7mm).

Average rainfall days in September - Mexico City, Mexico
  • Average rainfall days in September: 18.2 days

The month with the highest number of rainy days is July (23.2 days).
The month with the lowest number of rainy days is December (2 days).

Average daylight in September / Average sunshine in September - Mexico City, Mexico
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 13.3h).
The month with shortest days is December (Average daylight: 11h).

  • Average sunshine in September: 5.2h

The month with most sunshine is March (Average sunshine: 8.6h).
The month with least sunshine is September (Average sunshine: 5.2h).

Average UV index in September - Mexico City, Mexico
  • Average UV index in September: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 8).

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