September weather forecast
Yelapa, Mexico

September, the first month of the autumn in Yelapa, is also a moderately hot month, with an average temperature ranging between max 28.7°C (83.7°F) and min 21.8°C (71.2°F).

Temperature

Yelapa marks the onset of September with an average high-temperature of a still warm 28.7°C (83.7°F), a subtle shift from August's 29.3°C (84.7°F). Throughout September, the average low-temperature records at an agreeable 21.8°C (71.2°F).

Heat index

September's average heat index is appraised at a very hot 35°C (95°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

With an average relative humidity of 85%, September is the most humid month.

Rainfall

In Yelapa, during September, the rain falls for 24.8 days and regularly aggregates up to 160mm (6.3") of precipitation. In Yelapa, during the entire year, the rain falls for 153.7 days and collects up to 751mm (29.57") of precipitation.

Daylight

The average length of the day in September is 12h and 15min.
On the first day of September, sunrise is at 6:46 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:50 pm CST.

Sunshine

September has the least sunshine of the year, with an average of 8.1h of sunshine.

UV index

The months with the highest UV index are January through November, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 6 in September translates into these instructions:
Take precautions against overexposure. Protection against sun damage is needed. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.