September weather forecast
Nahuizalco, El Salvador

September, the first month of the autumn in Nahuizalco, is still a warm month, with an average temperature fluctuating between 22.1°C (71.8°F) and 29.2°C (84.6°F).

Temperature

Nahuizalco starts September with an average high-temperature of a moderately hot 29.2°C (84.6°F), a minor shift from August's 30°C (86°F). During September, the temperature is averaged to a low of 22.1°C (71.8°F) at night.

Heat index

For September, the heat index is computed to be a torrid 36°C (96.8°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The months with the highest humidity in Nahuizalco are September and October, with an average relative humidity of 81%.

Rainfall

In September, the rain falls for 24 days. Throughout September, 113mm (4.45") of precipitation is accumulated. In Nahuizalco, during the entire year, the rain falls for 166.9 days and collects up to 832mm (32.76") of precipitation.

Daylight

In September, the average length of the day is 12h and 12min.
On the first day of the month, sunrise is at 05:47 and sunset at 18:10. On the last day of September, sunrise is at 05:48 and sunset at 17:49 CST.

Sunshine

In Nahuizalco, the average sunshine in September is 9.6h.

UV index

June, August through December, with an average maximum UV index of 6, are months with the lowest UV index in Nahuizalco, El Salvador. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 6 in September translates into this advice:
Shield from overexposure. Defense against sun-related harm is required. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.