September weather forecast
Aparri, Philippines

The first month of the autumn, September, is also a moderately hot month in Aparri, Philippines, with an average temperature ranging between min 25.5°C (77.9°F) and max 29.9°C (85.8°F).

Temperature

The onset of September manifests an average high-temperature of a moderately hot 29.9°C (85.8°F), demonstrating a minor variation from the preceding month. Aparri welcomes an average low temperature of 25.5°C (77.9°F) in September, a gentle shift from the day's high.

Heat index

September's mean heat index is appraised at a very hot 38°C (100.4°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The average relative humidity in September is 81%.

Rainfall

In Aparri, in September, it is raining for 24.9 days, with typically 182mm (7.17") of accumulated precipitation. In Aparri, during the entire year, the rain falls for 284.5 days and collects up to 1949mm (76.73") of precipitation.

Daylight

The average length of the day in September is 12h and 15min.
On the first day of September in Aparri, sunrise is at 5:38 am and sunset at 6:07 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 5:42 pm PST.

Sunshine

In Aparri, the average sunshine in September is 9.3h.

UV index

March through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 7 during September translates into these guidelines:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.