September weather forecast
Nuevo Cuscatlán, El Salvador

Now well into the second half of the year, September in Nuevo Cuscatlán maintains a relentless display of the wet season. The combination of consistent rains and persistent humidity creates an environment of moisture. Cloud coverage reaches its pinnacle with 38% cloud cover, shielding the city against the intensive glare of the sun. With the consistent precipitation, expect a carry-over of the wet season characteristics into October.

Temperature

September's weather records an average high-temperature of a moderately hot 29.8°C (85.6°F), showing little deviation from August. Throughout the month of September, the average temperature dips to a pleasant 21.5°C (70.7°F) at night.

Heat index

September's average heat index is computed to be a sweltering 38°C (100.4°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

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

Rainfall

In Nuevo Cuscatlán, during September, the rain falls for 26.3 days and regularly aggregates up to 142mm (5.59") of precipitation. Throughout the year, there are 187 rainfall days, and 1106mm (43.54") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 12min.
On the first day of September, sunrise is at 05:45 and sunset at 18:08. On the last day of the month, sunrise is at 05:46 and sunset at 17:47 CST.

Sunshine

In Nuevo Cuscatlán, the average sunshine in September is 9.3h.

UV index

The months with the lowest UV index are January, May, June, August through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: A daily high UV index of 6 in September leads to these guidelines:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.