September weather forecast
Santolan, Philippines

The first month of the autumn, September, is also a hot month in Santolan, Philippines, with an average temperature fluctuating between 24.8°C (76.6°F) and 30.4°C (86.7°F).

Temperature

Santolan indicates an average high-temperature of a still hot 30.4°C (86.7°F) in September, showing minor variation from August's 30.2°C (86.4°F). Santolan's temperature in September lowers to a consistent average of 24.8°C (76.6°F) during the nights.

Heat index

In September, the heat index is appraised at a sweltering 39°C (102.2°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant 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.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

July through September, with an average relative humidity of 81%, are the most humid months.

Rainfall

In Santolan, during September, the rain falls for 22.3 days and regularly aggregates up to 122mm (4.8") of precipitation. Throughout the year, in Santolan, there are 203.1 rainfall days, and 842mm (33.15") of precipitation is accumulated.

Daylight

In September, the average length of the day 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 5:45 pm PST.

Sunshine

The average sunshine in September in Santolan is 8.4h.

UV index

The months with the highest UV index in Santolan, Philippines, are February through November, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Boost your sun resistance with garments that are densely woven yet spacious.