September weather forecast
San Juan Tepezontes, El Salvador

San Juan Tepezontes transitions into September with minor variations in weather factors. A mild slip in temperatures dovetails the continual rise in relative humidity. Constant rain pour ensures the city stays soaked, while clouds stand tall, limiting sunlight duration. Furthermore, earliest sunset times guide September into an early fall mode, migrating away from summer's long daylight hours.

Temperature

The onset of September brings an average high-temperature of a still hot 30.9°C (87.6°F), nearly matching the August temperature. In September, the recorded average low-temperature is a pleasant 20.5°C (68.9°F).

Heat index

In September, the average heat index is appraised at a blistering 41°C (105.8°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In September, the average relative humidity in San Juan Tepezontes, El Salvador, is 82%.

Rainfall

In September, the rain falls for 27.5 days. Throughout September, 134mm (5.28") of precipitation is accumulated. In San Juan Tepezontes, during the entire year, the rain falls for 192.2 days and collects up to 1062mm (41.81") of precipitation.

Daylight

The average length of the day in September is 12h and 12min.
On the first day of September, sunrise is at 05:44 and sunset at 18:07. On the last day of the month, sunrise is at 05:45 and sunset at 17:46 CST.

Sunshine

In September, the average sunshine in San Juan Tepezontes is 8.8h.

UV index

January, June through December, with an average maximum UV index of 6, are months with the lowest UV index in San Juan Tepezontes. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 6 during September leads to these instructions:
Resist extreme sun exposure. Guarding against solar damage is essential. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.