September weather forecast
Valenzuela, Philippines

The herald of September brings a gradual retreat of monsoon from Valenzuela. The temperature and humidity roughly stay the same as August, but the quantity of rainfall reduces to 27mm (1.06"). A consistent wind speed of 8.6km/h (5.3mph) helps to balance the weather equation. Even with the lowering rain gauge readings, the city remains enveloped in monsoonal remnants. September offers a humbling experience of weather transformation, gently escorting the city towards the drier months.

Temperature

Valenzuela's weather in September, with an average high-temperature of a still tropical 30.6°C (87.1°F), subtly shifts from August's 30.1°C (86.2°F). An average nighttime temperature of 25.3°C (77.5°F) is observed in Valenzuela, Philippines, during September.

Heat index

In September, the heat index is estimated at an extremely hot 40°C (104°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

August and September, with an average relative humidity of 80%, are the most humid months in Valenzuela.

Rainfall

In September, the rain falls for 6.9 days. Throughout September, 27mm (1.06") of precipitation is accumulated. In Valenzuela, during the entire year, the rain falls for 53.4 days and collects up to 149mm (5.87") of precipitation.

Daylight

In September, the average length of the day is 12h and 13min.
On the first day of the month, sunrise is at 5:43 am and sunset at 6:08 pm. On the last day of September, sunrise is at 5:45 am and sunset at 5:46 pm PST.

Sunshine

The average sunshine in September is 8.4h.

UV index

February through November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 7 in September translates into these instructions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.