September weather forecast
Bulacan, Philippines

September, the first month of the autumn in Bulacan, is also a hot month, with an average temperature ranging between max 30.5°C (86.9°F) and min 24.3°C (75.7°F).

Temperature

With the arrival of September, Bulacan's average high-temperature registers at a still tropical 30.5°C (86.9°F), indicating a subtle variation from the previous month. In September, the nighttime temperature lowers to an average of 24.3°C (75.7°F).

Heat index

The heat index value for September is appraised at a blisteringly hot 40°C (104°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The months with the highest humidity are August and September, with an average relative humidity of 83%.

Rainfall

In September, in Bulacan, the rain falls for 28.1 days. Throughout September, 252mm (9.92") of precipitation is accumulated. Throughout the year, in Bulacan, there are 245.4 rainfall days, and 1578mm (62.13") of precipitation is accumulated.

Daylight

In September, the average length of the day in Bulacan is 12h and 13min.
On the first day of September, sunrise is at 5:44 am and sunset at 6:08 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 5:46 pm PST.

Sunshine

The average sunshine in September in Bulacan is 8.1h.

UV index

The months with the highest UV index are February through June, August through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.