September weather forecast
Las Pilas, Guatemala

The first month of the autumn, September, is also a moderately hot month in Las Pilas, Guatemala, with an average temperature varying between 18.7°C (65.7°F) and 29.5°C (85.1°F).

Temperature

September observes an average high-temperature of a still moderately hot 29.5°C (85.1°F), marking an insignificant difference from August's 29.7°C (85.5°F). Las Pilas's temperature lowers to a mean of 18.7°C (65.7°F) during the nights in September.

Heat index

In September, the average heat index is computed to be a very hot 37°C (98.6°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. 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 are particularly relevant to children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In September, the average relative humidity in Las Pilas is 83%.

Rainfall

In September, the rain falls for 23.2 days. Throughout September, 98mm (3.86") of precipitation is accumulated. Throughout the year, in Las Pilas, there are 193.9 rainfall days, and 636mm (25.04") of precipitation is accumulated.

Daylight

In September, the average length of the day in Las Pilas is 12h and 13min.
On the first day of September, sunrise is at 05:49 and sunset at 18:13. On the last day of the month, sunrise is at 05:51 and sunset at 17:51 CST.

Sunshine

In September, the average sunshine in Las Pilas is 8.3h.

UV index

In September, the average daily maximum UV index in Las Pilas is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 6 transforms into these recommendations:
Fend off overexposure. Sun protection is vital. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.