September weather forecast
Ilopango, El Salvador

September marks a peak in rainfall with 150mm (5.91") received over 26.5 days. The reduction in daylight hours to 12.2 coincides with the decline in temperatures. Wind speeds lessen slightly to 4.5km/h (2.8mph), providing a small respite from the dowpour. A slight reduction in the average number of sunshine hours observed does not deter tourists, as the city's beauty shines through.

Temperature

As Ilopango welcomes September, the average high-temperature stabilizes at a still hot 30.5°C (86.9°F), showing little deviation from August's 31.6°C (88.9°F). Throughout the month of September, Ilopango sees a steady low-temperature average of 20.9°C (69.6°F).

Heat index

The heat index value during September is estimated at a scorching 40°C (104°F). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
Heat index evaluations are typically in the context of light winds and shaded environments. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The months with the highest humidity are September and October, with an average relative humidity of 82%.

Rainfall

In Ilopango, in September, it is raining for 26.5 days, with typically 150mm (5.91") of accumulated precipitation. In Ilopango, during the entire year, the rain falls for 196.7 days and collects up to 1216mm (47.87") of precipitation.

Daylight

The average length of the day in September is 12h and 12min.
On the first day of September in Ilopango, 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 Ilopango, the average sunshine in September is 9h.

UV index

May through December, with an average maximum UV index of 6, are months with the lowest UV index in Ilopango. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in September transforms into the following instructions:
Ward off overexposure. Defence against solar harm is crucial. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Tightly woven clothing, when worn loosely, shields effectively against the Sun.