September weather forecast
Subic, Philippines

The first month of the autumn, September, is still a warm month in Subic, Philippines, with temperature in the range of an average high of 28.9°C (84°F) and an average low of 25.3°C (77.5°F).

Temperature

The initiation of September sees a high-temperature average of a still warm 28.9°C (84°F), identical to the preceding month. The month of September is marked by an average minimum temperature of 25.3°C (77.5°F), slightly cooler than its daytime counterpart.

Heat index

The heat index in September is computed to be a fiery hot 35°C (95°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

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

Rainfall

In Subic, Philippines, in September, during 27.1 rainfall days, 296mm (11.65") of precipitation is typically accumulated. In Subic, during the entire year, the rain falls for 237.5 days and collects up to 1892mm (74.49") of precipitation.

Sea temperature

In Subic, in September, the average water temperature is 28.6°C (83.5°F).
Note: With water temperature from 25°C (77°F) to 29°C (84.2°F), all water activities are comfortable and delightful, devoid of discomfort even for lengthened periods.

Daylight

In Subic, Philippines, the average length of the day in September is 12h and 13min.
On the first day of the month, sunrise is at 5:46 am and sunset at 6:11 pm. On the last day of September, in Subic, sunrise is at 5:48 am and sunset at 5:49 pm PST.

Sunshine

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

UV index

The months with the highest UV index in Subic, Philippines, are February through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 7 in September translates into these instructions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Caution! The mirror effect of sand and water ups the UV radiation strength.