September weather forecast
Yelapa, Mexico

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

Temperature

The weather during September records an average high-temperature of a still moderately hot 28.7°C (83.7°F), closely mirroring the preceding month. Yelapa records an average nighttime low-temperature of 21.8°C (71.2°F) throughout September.

Heat index

September's mean heat index is appraised at a fiery hot 35°C (95°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

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

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

In Yelapa, 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

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

UV index

The months with the highest UV index in Yelapa are January through November, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: An average UV index of 6 in September transforms into this advice:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.