September weather forecast
Boston, Philippines

The first month of the autumn, September, is also a hot month in Boston, Philippines, with an average temperature varying between 21.5°C (70.7°F) and 32°C (89.6°F).

Temperature

The commencement of September is characterized by an average high temperature of a still tropical 32°C (89.6°F), bearing no significant change from August. During the nights in September, Boston experiences a consistent average temperature of 21.5°C (70.7°F).

Heat index

In September, the heat index is appraised at a burning hot 45°C (113°F). Beware: Heat exhaustion along with heat cramps are on the cards. Heatstroke could result from sustained physical activity.
When referencing the heat index, its values are suitable for shady environments and light breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

August and September, with an average relative humidity of 81%, are the least humid months.

Rainfall

In September, the rain falls for 21.6 days. Throughout September, 102mm (4.02") of precipitation is accumulated. In Boston, during the entire year, the rain falls for 279.1 days and collects up to 1414mm (55.67") of precipitation.

Sea temperature

In Boston, Philippines, in September, the average water temperature is 29.2°C (84.6°F).
Note: For swimming, diving, and enjoying other water activities, the range of 25°C (77°F) to 29°C (84.2°F) in water temperature is considered ideal, offering pleasure for extended periods without discomfort.

Daylight

The average length of the day in September is 12h and 10min.
On the first day of September in Boston, sunrise is at 5:26 am and sunset at 5:42 pm. On the last day of the month, sunrise is at 5:22 am and sunset at 5:26 pm PST.

Sunshine

In September, the average sunshine is 8.5h.

UV index

April through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 7 during September leads to these instructions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Heed this! UV intensity is much stronger when reflected off sand and water.