September weather forecast
San Sebastian Salitrillo, El Salvador

September brings along almost similar conditions as August, with an insignificant drop in average rainfall, documented at 141mm (5.55"), sustaining the city's appeal as a tropical paradise. Consequently, the city basks in a humid, soothing climate with increased sunshine hours highlighting the vibrancy of the flora. Days are typically overcast but filled with enough sunshine to create a pleasant bounce in city life. Notably, September stands as a beacon of the coming changes, paving the way for a recognizable season alteration. Despite the relatively high rainfall, the city of San Sebastian Salitrillo remains an attractive vibrant green haven.

Temperature

A minimal variation is noted in San Sebastian Salitrillo's average high-temperature at the onset of September, reaching a warm 29.3°C (84.7°F) from August's 30°C (86°F). San Sebastian Salitrillo's nighttime temperature during September is consistently averaged at a refreshing 18.9°C (66°F).

Heat index

The heat index in September is calculated to be a torrid 37°C (98.6°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In September, the average relative humidity is 85%.

Rainfall

In San Sebastian Salitrillo, El Salvador, in September, during 24.7 rainfall days, 141mm (5.55") of precipitation is typically accumulated. Throughout the year, there are 181.4 rainfall days, and 1055mm (41.54") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 12min.
On the first day of the month, sunrise is at 05:46 and sunset at 18:09. On the last day of September, sunrise is at 05:47 and sunset at 17:48 CST.

Sunshine

In September, the average sunshine is 7.8h.

UV index

The month with the lowest UV index is September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 5 transforms into these recommendations:
Exercise prevention - Warding off sunburn is urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.