September weather forecast
Mapastepec, Mexico

The first month of the autumn, September, is also a hot month in Mapastepec, Mexico, with an average temperature ranging between max 30.1°C (86.2°F) and min 23.8°C (74.8°F).

Temperature

The arrival of September marks a slight shift to an average high-temperature of a still hot 30.1°C (86.2°F) from August's 30.7°C (87.3°F). In Mapastepec, the nighttime temperature averages to a moderately hot 23.8°C (74.8°F) during September.

Heat index

The average heat index in September is appraised at a sweltering 37°C (98.6°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. 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 hold particular importance 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.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In Mapastepec, the average relative humidity in September is 75%.

Rainfall

In Mapastepec, during September, the rain falls for 27.6 days and regularly aggregates up to 167mm (6.57") of precipitation. In Mapastepec, Mexico, during the entire year, the rain falls for 226.8 days and collects up to 1216mm (47.87") of precipitation.

Daylight

In September, the average length of the day is 12h and 13min.
On the first day of the month, sunrise is at 5:59 am and sunset at 6:23 pm. On the last day of September, in Mapastepec, sunrise is at 6:01 am and sunset at 6:01 pm CST.

Sunshine

In Mapastepec, the average sunshine in September is 11h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Mapastepec are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 7 during September translates into these guidelines:
Take precautions against overexposure. Protection against sun damage is needed. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.