September weather forecast
Diliman, Philippines

The first month of the autumn, September, is still a hot month in Diliman, Philippines, with an average temperature varying between 25°C (77°F) and 30.7°C (87.3°F).

Temperature

Diliman experiences a recorded average high-temperature of a still hot 30.7°C (87.3°F) in September, closely aligned with August's 30.3°C (86.5°F). Throughout September, Diliman anticipates an average low-temperature of 25°C (77°F).

Heat index

In September, the heat index is computed to be a blistering 40°C (104°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Heat index determinations are made taking into account the shade and light air movements. 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 'feels like' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

The average relative humidity in September is 80%.

Rainfall

In Diliman, during September, the rain falls for 20.3 days and regularly aggregates up to 58mm (2.28") of precipitation. Throughout the year, there are 154.9 rainfall days, and 349mm (13.74") of precipitation is accumulated.

Daylight

In September, the average length of the day in Diliman is 12h and 13min.
On the first day of the month, sunrise is at 5:43 am and sunset at 6:07 pm. On the last day of September, sunrise is at 5:45 am and sunset at 5:46 pm PST.

Sunshine

In Diliman, the average sunshine in September is 8.3h.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index in Diliman. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Experience reduced UV exposure by about half when donning a wide-brim hat.