September weather forecast
San Julian, Philippines

The first month of the autumn, September, is also a hot month in San Julian, Philippines, with an average temperature ranging between max 30.5°C (86.9°F) and min 25.2°C (77.4°F).

Temperature

The transition into September is marked with an average high-temperature of a still tropical 30.5°C (86.9°F), showing an insignificant shift from August's 30.8°C (87.4°F). In San Julian, the nighttime temperature averages to a moderately hot 25.2°C (77.4°F) during September.

Heat index

September's average heat index is appraised at a sweltering 39°C (102.2°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in September is 80%.

Rainfall

In San Julian, in September, during 17.5 rainfall days, 62mm (2.44") of precipitation is typically accumulated. In San Julian, during the entire year, the rain falls for 246.8 days and collects up to 1279mm (50.35") of precipitation.

Sea temperature

In San Julian, in September, the average water temperature is 29.3°C (84.7°F).
Note: For any water activity, surface water temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed perfect and extremely pleasing for enduring enjoyment.

Daylight

The average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 5:28 am and sunset at 5:48 pm. On the last day of September, in San Julian, sunrise is at 5:27 am and sunset at 5:29 pm PST.

Sunshine

The average sunshine in September in San Julian is 8.4h.

UV index

January through September, November and December, with an average maximum UV index of 7, are months with the highest UV index in San Julian. 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: The UV index of 7 during September translates into the following guidance:
Prevent overexposure. Protection from the sun's harmful effects is needed. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely. Alert! Sand and water increase UV exposure due to their reflective properties.