Guadalajara
Mexico
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Guadalajara, Mexico

Water in front of the Cabanas Cultural Institute in Guadalajara, Mexico
Water in front of the Cabanas Cultural Institute in Guadalajara, Mexico
September, the first month of the autumn, in Guadalajara, is still a warm month, with temperature in the range of an average high of 27.1°C (80.8°F) and an average low of 16.5°C (61.7°F).

Temperature

In September, the average high-temperature is practically the same as in August - a still moderately hot 27.1°C (80.8°F). The average low-temperature, in Guadalajara, is 16.5°C (61.7°F).

Heat index

The average heat index in September is evaluated at 29.1°C (84.4°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, clothing, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity is 71%.

Rainfall

In Guadalajara, it is raining for 15.5 days, with typically 169.5mm (6.7") of accumulated precipitation. Throughout the year, there are 90.9 rainfall days, and 1002.4mm (39.5") of precipitation is accumulated.

Daylight

In Guadalajara, the average length of the day is 12.3h.

Sunshine

In September, the average sunshine in Guadalajara is 6.2h.

UV index

Months with the highest UV index in Guadalajara, Mexico, are March through September, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 12 in September interpret into the following advice:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Prolonged stay under the direct sun should be avoided as much as possible, especially if a person burns easily. Sunscreen with a minimum 30 sun protection factor should always be used.

What is the temperature in September in Guadalajara?

The average high-temperature, in September, is 27.1°C (80.8°F), while the average low-temperature is 16.5°C (61.7°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), that calculates temperature value influenced by the moisture in the air, in September is appraised at 29.1°C (84.4°F).

What is the average humidity in September in Guadalajara?

In Guadalajara, Mexico, the average relative humidity in September is 71%.

How many days does it rain in September in Guadalajara?

In Guadalajara, in September, it is raining for 15.5 days, with typically 169.5mm (6.7") of accumulated precipitation.

How many hours of daylight does Guadalajara have in September?

In September, the average length of the day in Guadalajara, Mexico, is 12.3h.

How long on average sun shines in September in Guadalajara?

In September, the average sunshine is 6.2h.

What is the month with the highest UV index in Guadalajara?

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 Guadalajara?

In Guadalajara, the average daily maximum UV index in September is 12. A UV Index value of 11, and more, symbolizes an extreme health vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Guadalajara, Mexico
  • Average high temperature in September: 27.1°C

The warmest month (with the highest average high temperature) is May (32.5°C).
Months with the lowest average high temperature are January and December (24.7°C).

  • Average low temperature in September: 16.5°C

The month with the highest average low temperature is June (17.3°C).
The coldest month (with the lowest average low temperature) is January (9.5°C).

Average humidity in September - Guadalajara, Mexico
  • Average humidity in September: 71%

The month with the highest relative humidity is August (72%).
The month with the lowest relative humidity is April (46%).

Average rainfall in September - Guadalajara, Mexico
  • Average rainfall in September: 169.5mm

The wettest month (with the highest rainfall) is July (272.5mm).
The driest month (with the lowest rainfall) is March (4.7mm).

Average rainfall days in September - Guadalajara, Mexico
  • Average rainfall days in September: 15.5 days

The month with the highest number of rainy days is July (21.6 days).
The month with the lowest number of rainy days is March (0.7 days).

Average daylight in September / Average sunshine in September - Guadalajara, Mexico
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in September: 6.2h

The month with most sunshine is May (Average sunshine: 9h).
The month with least sunshine is December (Average sunshine: 6.1h).

Average UV index in September - Guadalajara, 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 7).