September weather forecastSiay, Philippines
September
Weather in September
The first month of the autumn, September, is still a warm month in Siay, Philippines, with an average temperature varying between 23.7°C (74.7°F) and 28.8°C (83.8°F).Temperature
September experiences an average high-temperature of a still warm 28.8°C (83.8°F), barely different from August's 29.1°C (84.4°F). An average low-temperature of 23.7°C (74.7°F) is recorded during the nights in September.Heat index
The heat index value for September is evaluated at a very hot 35°C (95°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
The average relative humidity in September is 84%.Rainfall
In September, the rain falls for 22.5 days. Throughout September, 85mm (3.35") of precipitation is accumulated. In Siay, during the entire year, the rain falls for 265.6 days and collects up to 1186mm (46.69") of precipitation.Daylight
The average length of the day in September is 12h and 10min.On the first day of September, sunrise is at 5:40 am and sunset at 5:56 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 5:40 pm PST.
Sunshine
In September, the average sunshine is 7.7h.UV index
The months with the highest UV index are January through September, November and December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 7 in September leads to these guidelines:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Siay, Philippines
- Average high temperature in September: 28.8°C
The warmest month (with the highest average high temperature) is April (29.7°C).
The month with the lowest average high temperature is January (28.1°C).
- Average low temperature in September: 23.7°C
The months with the highest average low temperature are May, October and November (24.2°C).
The coldest month (with the lowest average low temperature) is February (23°C).
Average pressure in September
Siay, Philippines
- Average pressure in September: 1009.7mbar
The month with the highest atmospheric pressure is February (1010.6mbar).
The months with the lowest atmospheric pressure are November and December (1009mbar).
Average wind speed in September
Siay, Philippines
- Average wind speed in September: 7.4km/h
The windiest month (with the highest average wind speed) is February (13km/h).
The calmest month (with the lowest average wind speed) is May (6.1km/h).
Average humidity in September
Siay, Philippines
- Average humidity in September: 84%
The months with the highest relative humidity are January and November (85%).
The month with the lowest relative humidity is March (81%).
Average rainfall in September
Siay, Philippines
- Average rainfall in September: 85mm
The wettest month (with the highest rainfall) is June (142mm).
The driest month (with the least rainfall) is February (50mm).
Average rainfall days in September
Siay, Philippines
- Average rainfall days in September: 22.5 days
The month with the highest number of rainy days is May (26.6 days).
The month with the least rainy days is February (15 days).
Average daylight in September /
Average sunshine in September
Siay, Philippines
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in September
Siay, Philippines
- Average sunshine days in September: 6.8 days
The month with the most sunshine days is February (11.1 days).
The month with the least sunshine days is May (3.7 days).
Average UV index in September
Siay, Philippines
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, November and December (UV index 7).
The month with the lowest UV index is October (UV index 6).
Average cloud cover in September
Siay, Philippines
- Average cloud cover in September: 47
The months with the most cloud cover are June and July (Cloud cover 51).
The month with the least cloud cover is March (Cloud cover 35).
Average visibility in September
Siay, Philippines
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
