September weather forecast
Antiguo Cuscatlán, El Salvador

September in Antiguo Cuscatlán, while still experiencing substantive rainfall, marks the onset of a progressive drop in precipitation. Temperature averages remain slightly cooler compared to the hotter summer months. The city also experiences shorter daylight hours, but still allows plenty of sunshine through. A minor reduction in wind speed is observed, comfortably offset by the softer temperatures. September might still have considerable showers, but begins to hint at the drier conditions on the horizon.

Temperature

Antiguo Cuscatlán notes an average high-temperature of a moderately hot 29.8°C (85.6°F) in September, displaying minor variation from August. Antiguo Cuscatlán temperatures generally rest at a low of 21.5°C (70.7°F) during the September nights.

Heat index

The heat index for September is computed to be a very hot 38°C (100.4°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are largely significant for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

The months with the highest humidity in Antiguo Cuscatlán, El Salvador, are September and October, with an average relative humidity of 82%.

Rainfall

In Antiguo Cuscatlán, during September, the rain falls for 26.3 days and regularly aggregates up to 142mm (5.59") of precipitation. In Antiguo Cuscatlán, during the entire year, the rain falls for 187 days and collects up to 1106mm (43.54") of precipitation.

Daylight

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

Sunshine

The average sunshine in September in Antiguo Cuscatlán 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 rays for the average person.
Note: A maximum high daily UV index of 6 during September translates into the following directions:
Deflect overexposure. Sun protection is a necessity. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.