September weather forecastSan Isidro, Philippines
September
Weather in September
September, the first month of the autumn in San Isidro, is a tropical month, with temperature in the range of an average high of 30°C (86°F) and an average low of 23.1°C (73.6°F).Temperature
The arrival of September sees an average high-temperature of a hot 30°C (86°F), hardly diverging from August's 29.8°C (85.6°F). An average low-temperature of 23.1°C (73.6°F) is observed during the September nights.Heat index
For September, the heat index is computed to be a fiery hot 39°C (102.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Note that heat index values are valued for light wind and location in the shade. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
The months with the highest humidity are August and September, with an average relative humidity of 86%.Rainfall
In San Isidro, in September, during 29 rainfall days, 259mm (10.2") of precipitation is typically accumulated. Throughout the year, there are 252.9 rainfall days, and 1795mm (70.67") of precipitation is accumulated.Daylight
In September, the average length of the day in San Isidro is 12h and 13min.On the first day of September in San Isidro, sunrise is at 5:43 am and sunset at 6:08 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 5:46 pm PST.
Sunshine
The average sunshine in September is 8h.UV index
January, July, September through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 6 in September translates into these instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
San Isidro, Philippines
- Average high temperature in September: 30°C
The warmest month (with the highest average high temperature) is April (33.5°C).
The month with the lowest average high temperature is January (28.8°C).
- Average low temperature in September: 23.1°C
The month with the highest average low temperature is May (24.8°C).
The coldest month (with the lowest average low temperature) is January (20.6°C).
Average pressure in September
San Isidro, Philippines
- Average pressure in September: 1008.2mbar
The month with the highest atmospheric pressure is February (1013.5mbar).
The month with the lowest atmospheric pressure is August (1007.6mbar).
Average wind speed in September
San Isidro, Philippines
- Average wind speed in September: 5.6km/h
The windiest months (with the highest average wind speed) are January and December (7.7km/h).
The calmest month (with the lowest average wind speed) is May (5.4km/h).
Average humidity in September
San Isidro, Philippines
- Average humidity in September: 86%
The months with the highest relative humidity are August and September (86%).
The month with the lowest relative humidity is April (71%).
Average rainfall in September
San Isidro, Philippines
- Average rainfall in September: 259mm
The wettest month (with the highest rainfall) is July (306mm).
The driest month (with the least rainfall) is February (23mm).
Average rainfall days in September
San Isidro, Philippines
- Average rainfall days in September: 29 days
The month with the highest number of rainy days is July (30.3 days).
The month with the least rainy days is February (9.7 days).
Average daylight in September /
Average sunshine in September
San Isidro, Philippines
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is April (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 6h and 24min).
Average sunshine days in September
San Isidro, Philippines
- Average sunshine days in September: 0.6 days
The month with the most sunshine days is March (17.3 days).
The month with the least sunshine days is July (0.5 days).
Average UV index in September
San Isidro, Philippines
- Average UV index in September: 6
The months with the highest UV index are February, March, April, May, June and August (UV index 7).
The months with the lowest UV index are January, July, September, October, November and December (UV index 6).
Average cloud cover in September
San Isidro, Philippines
- Average cloud cover in September: 52
The month with the most cloud cover is August (Cloud cover 57).
The month with the least cloud cover is March (Cloud cover 31).
Average visibility in September
San Isidro, Philippines
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May and June (9km).
The months with the lowest visibility are July, August, September, October, November and December (8km).
