September weather forecast
Santiago, Philippines

The first month of the autumn, September, is also a hot month in Santiago, Philippines, with an average temperature ranging between min 21.7°C (71.1°F) and max 30.8°C (87.4°F).

Temperature

During September, Santiago records an average high-temperature of a still hot 30.8°C (87.4°F), marking a slight divergence from August's 31.4°C (88.5°F). During the month of September, Santiago's nighttime temperature lowers to an average of 21.7°C (71.1°F).

Heat index

September's heat index is calculated to be a blisteringly hot 41°C (105.8°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In September, the average relative humidity in Santiago is 81%.

Rainfall

In Santiago, Philippines, in September, it is raining for 26.3 days, with typically 159mm (6.26") of accumulated precipitation. In Santiago, during the entire year, the rain falls for 275.8 days and collects up to 1583mm (62.32") of precipitation.

Daylight

The average length of the day in September is 12h and 14min.
On the first day of September in Santiago, Philippines, sunrise is at 5:40 am and sunset at 6:07 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 5:43 pm PST.

Sunshine

In September, the average sunshine is 9.4h.

UV index

April through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.