September weather forecast
San Andres, Philippines

September, the first month of the autumn in San Andres, is also a moderately hot month, with an average temperature varying between 29.7°C (85.5°F) and 25.1°C (77.2°F).

Temperature

Stepping into September, San Andres records an average high-temperature of a moderately hot 29.7°C (85.5°F), almost consistent with August. September nights cool to an average low-temperature of 25.1°C (77.2°F), a marginal decrease from its daytime equivalent.

Heat index

The average heat index in September is calculated to be a fiery hot 37°C (98.6°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In September, the average relative humidity is 82%.

Rainfall

In San Andres, in September, during 21.5 rainfall days, 81mm (3.19") of precipitation is typically accumulated. In San Andres, during the entire year, the rain falls for 274.1 days and collects up to 1270mm (50") of precipitation.

Sea temperature

In September, the average sea temperature is 29.2°C (84.6°F).
Note: For activities such as swimming and diving, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

In San Andres, the average length of the day in September is 12h and 13min.
On the first day of the month, sunrise is at 5:32 am and sunset at 5:55 pm. On the last day of September, in San Andres, sunrise is at 5:33 am and sunset at 5:34 pm PST.

Sunshine

In September, the average sunshine in San Andres is 8.1h.

UV index

February through November, with an average maximum UV index of 7, are months with the highest UV index in San Andres. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 7 during September leads to these instructions:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Caution! Sand and water reflections can notably increase the UV radiation intensity.