Acapulco
Mexico
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Acapulco, Mexico

Palm trees and a lovely white sandy beach in Acapulco, Mexico, with a distant view of the city structures and a mountain
Palm trees and a lovely white sandy beach in Acapulco, Mexico, with a distant view of the city structures and a mountain
The first month of the autumn, September, is still a tropical month in Acapulco, Mexico, with temperature in the range of an average high of 31.6°C (88.9°F) and an average low of 24.7°C (76.5°F).

Temperature

In September, the average high-temperature is essentially the same as in August - a still hot 31.6°C (88.9°F). In September, in Acapulco, the average low-temperature is 24.7°C (76.5°F).

Heat index

The average heat index is estimated at a blistering 42.2°C (108°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
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 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, differences in body mass, height, and shape, metabolic differences). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The most humid month is September, with an average relative humidity of 78%.

Rainfall

The month with the most rainfall in Acapulco is September when the rain falls for 14.3 days and typically aggregates up to 309.6mm (12.2") of precipitation.

Sea temperature

In Acapulco, in September, the average water temperature is 29.9°C (85.8°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

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

Sunshine

The month with the least sunshine in Acapulco is September, with an average of 6.5h of sunshine.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an excessive health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 12 interpret into the following advice:
Practice all-important precautions. Light skin people may get burned in less than 5 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Acapulco?

The average high-temperature, in September, in Acapulco, Mexico, is 31.6°C (88.9°F), while the average low-temperature is 24.7°C (76.5°F). In September, the average heat index (a.k.a. 'feels like', 'real feel'), that combines both air temperature and relative humidity, is calculated to 42.2°C (108°F).

What is the most humid month in Acapulco?

September is the most humid month, with an average relative humidity of 78%.

What is the average humidity in September in Acapulco?

In September, the average relative humidity is 78%.

How many days does it rain in September in Acapulco?

In Acapulco, during September, the rain falls for 14.3 days and regularly aggregates up to 309.6mm (12.2") of precipitation.

What is the wettest month in Acapulco?

The month with the most rainfall in Acapulco is September when the rain falls for 14.3 days and typically aggregates up to 309.6mm (12.2") of precipitation.

What is the water temperature in September in Acapulco?

In Acapulco, in September, the average water temperature is 29.9°C (85.8°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Acapulco have in September?

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

What is the month with the least sunshine in Acapulco?

September has the least sunshine of the year in Acapulco, with an average of 6.5h of sunshine.

How many hours of sunshine does Acapulco have in September?

In September, the average sunshine in Acapulco is 6.5h.

When is the highest UV index in Acapulco?

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

What is the UV index reading in September in Acapulco?

The average daily maximum UV index in September in Acapulco is 12. A UV Index reading of 11, and higher, represents an ultimate hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Acapulco, Mexico
  • Average high temperature in September: 31.6°C

The warmest month (with the highest average high temperature) is July (32.3°C).
Months with the lowest average high temperature are January, February and March (30.4°C).

  • Average low temperature in September: 24.7°C

The month with the highest average low temperature is June (25.2°C).
The coldest month (with the lowest average low temperature) is January (23.3°C).

Average humidity in September - Acapulco, Mexico
  • Average humidity in September: 78%

The month with the highest relative humidity is September (78%).
The month with the lowest relative humidity is March (72%).

Average rainfall in September - Acapulco, Mexico
  • Average rainfall in September: 309.6mm

The wettest month (with the highest rainfall) is September (309.6mm).
The driest month (with the lowest rainfall) is March (2.2mm).

Average rainfall days in September - Acapulco, Mexico
  • Average rainfall days in September: 14.3 days

The month with the highest number of rainy days is September (14.3 days).
The month with the lowest number of rainy days is April (0.2 days).

Average sea temperature in September - Acapulco, Mexico
  • Average sea temperature in September: 29.9°C

The best month for swimming (with the highest average sea temperature) is August (30°C).
The coldest month (with the lowest average sea temperature) is March (27.7°C).

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

The month with the longest days is June (Average daylight: 13.1h).
The month with shortest days is December (Average daylight: 11.1h).

  • Average sunshine in September: 6.5h

The month with most sunshine is March (Average sunshine: 9.3h).
The month with least sunshine is September (Average sunshine: 6.5h).

Average UV index in September - Acapulco, 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).