September weather forecastSan Juan, Philippines
September
Weather in September
September, the first month of the autumn in San Juan, is still a warm month, with an average temperature ranging between min 24.3°C (75.7°F) and max 29.8°C (85.6°F).Temperature
Entering September, the average high-temperature is recorded at a still moderately hot 29.8°C (85.6°F), exhibiting a minimal shift from August's 29.9°C (85.8°F). In September, the average low-temperature in San Juan records at a still moderately hot 24.3°C (75.7°F) during the nights.Heat index
In September, the average heat index is calculated to be a very hot 38°C (100.4°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
July and September, with an average relative humidity of 83%, are the most humid months.Rainfall
In September, in San Juan, the rain falls for 16.1 days. Throughout September, 71mm (2.8") of precipitation is accumulated. Throughout the year, there are 196.1 rainfall days, and 602mm (23.7") of precipitation is accumulated.Daylight
In September, the average length of the day in San Juan is 12h and 13min.On the first day of the month, sunrise is at 5:43 am and sunset at 6:07 pm. On the last day of September, sunrise is at 5:45 am and sunset at 5:46 pm PST.
Sunshine
The average sunshine in September in San Juan is 8.2h.UV index
The months with the highest UV index are February through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the UV index of 7 transforms into the following advice:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
San Juan, Philippines
- Average high temperature in September: 29.8°C
The warmest month (with the highest average high temperature) is May (32°C).
The month with the lowest average high temperature is January (26.6°C).
- Average low temperature in September: 24.3°C
The month with the highest average low temperature is May (25.3°C).
The coldest month (with the lowest average low temperature) is February (22.7°C).
Average pressure in September
San Juan, Philippines
- Average pressure in September: 1008.2mbar
The month with the highest atmospheric pressure is February (1013.4mbar).
The month with the lowest atmospheric pressure is August (1007.6mbar).
Average wind speed in September
San Juan, Philippines
- Average wind speed in September: 8.3km/h
The windiest month (with the highest average wind speed) is January (14.2km/h).
The calmest month (with the lowest average wind speed) is May (7.5km/h).
Average humidity in September
San Juan, Philippines
- Average humidity in September: 83%
The months with the highest relative humidity are July and September (83%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
San Juan, Philippines
- Average rainfall in September: 71mm
The wettest month (with the highest rainfall) is August (93mm).
The driest month (with the least rainfall) is February (15mm).
Average rainfall days in September
San Juan, Philippines
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is October (18.6 days).
The month with the least rainy days is February (12.5 days).
Average daylight in September /
Average sunshine in September
San Juan, 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 18min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is April (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
San Juan, Philippines
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is August (14.3 days).
The month with the least sunshine days is January (4.3 days).
Average UV index in September
San Juan, Philippines
- Average UV index in September: 7
The months with the highest UV index are February, March, April, May, June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January and December (UV index 6).
Average cloud cover in September
San Juan, Philippines
- Average cloud cover in September: 45
The month with the most cloud cover is August (Cloud cover 52).
The month with the least cloud cover is April (Cloud cover 27).
Average visibility in September
San Juan, Philippines
- Average visibility in September: 9km
The months with the highest visibility are February, March, April and December (10km).
The months with the lowest visibility are January, May, June, July, August, September, October and November (9km).
