September weather forecast
Ahuachapan, El Salvador

September’s 116mm (4.57") of rainfall shows a marginal decrease but maintains the wet disposition Ahuachapan has adopted since May. At this point, the city experiences approximately 22 rainy days in the month, which is higher than the preceding months. The persistent cloud covers and moderate temperatures markers of this period. These traits are starting to lose their dominance over the weather scenario.

Temperature

Ahuachapan marks the onset of September with an average high-temperature of a still moderately hot 28.8°C (83.8°F), a subtle shift from August's 29.8°C (85.6°F). In September, Ahuachapan encounters an average low-temperature of 20°C (68°F) during the night.

Heat index

The heat index for September is estimated at a fiery hot 35°C (95°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely 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.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

September and October, with an average relative humidity of 84%, are the most humid months in Ahuachapan.

Rainfall

In Ahuachapan, in September, during 22.6 rainfall days, 116mm (4.57") of precipitation is typically accumulated. Throughout the year, in Ahuachapan, there are 169.5 rainfall days, and 865mm (34.06") of precipitation is accumulated.

Daylight

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

Sunshine

The average sunshine in September in Ahuachapan is 9.4h.

UV index

January, February, May through December, with an average maximum UV index of 6, are months with the lowest UV index in Ahuachapan. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum high UV index of 6 in September translates into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.