September weather forecast
Batangas, Philippines

September presents an ever-increasing amount of rainfall, marking its reign as the wettest month in Batangas. Despite this, sunlight struggles to hold its own with average daily sunshine hours retreating softly. The monsoon season continues its play with overcast skies filled with rain-bearing clouds. Cooler winds brush through the city, which is a harbinger of the wet trend cooling down as the region steps into October.

Temperature

Batangas's transition into September carries an average high-temperature of a still moderately hot 29.3°C (84.7°F), consistent with the temperature in August. Nights in September cool down in Batangas, Philippines, indicating a minor disparity from daytime highs with an average low-temperature of 24.3°C (75.7°F).

Heat index

The average heat index in September is estimated at a torrid 37°C (98.6°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

The months with the highest humidity are September and October, with an average relative humidity of 84%.

Rainfall

September is the month with the most rainfall in Batangas. Rain falls for 21.2 days and accumulates 105mm (4.13") of precipitation.

Sea temperature

In September, the average sea temperature is 28.6°C (83.5°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and other activities, ensuring comfort and enjoyment for lengthened periods.

Daylight

The average length of the day in September in Batangas, Philippines, is 12h and 13min.
On the first day of the month, sunrise is at 5:44 am and sunset at 6:07 pm. On the last day of September, in Batangas, sunrise is at 5:45 am and sunset at 5:46 pm PST.

Sunshine

In Batangas, the average sunshine in September is 8.4h.

UV index

The months with the highest UV index in Batangas are February through June, August and September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Attention! UV radiation is markedly stronger with water and sand reflections.