Mexico City
Mexico
Long-term weather forecast
Long-term weather forecast

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 also a moderately hot month in Mexico City, Mexico, with temperature in the range of an average low of 12.7°C (54.9°F) and an average high of 23.3°C (73.9°F).

Temperature

In Mexico City, the average high-temperature is practically the same as in August - a still moderately hot 23.3°C (73.9°F). The average low-temperature, in Mexico City, is 12.7°C (54.9°F).

Humidity

With an average relative humidity of 70%, September is the most humid month.

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

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

Sunshine

The month with the least sunshine is September, with an average of 5.2h of sunshine.

UV index

Months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 12 in September transform into the following instructions:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Mexico City?

In September, the average high-temperature is 23.3°C (73.9°F), and the average low-temperature is 12.7°C (54.9°F).

What is the most humid month in Mexico City?

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

What is the average humidity in September in Mexico City?

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

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

In Mexico City, Mexico, in September, it is raining for 18.2 days, with typically 139.8mm (5.5") of accumulated precipitation.

What is the average length of the day in September in Mexico City?

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

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

The month with the least sunshine is September, with an average of 5.2h of sunshine.

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

The average sunshine in September in Mexico City is 5.2h.

When is the highest UV index in Mexico City?

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

How high is the UV index in September in Mexico City?

In Mexico City, Mexico, the average daily maximum UV index in September is 12. A UV Index estimate of 11, and higher, represents an excessive health risk from unprotected exposure to the UV radiation.
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).