Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With the start of September, Ponneri measures an average high-temperature of a still tropical 31.6°C (88.9°F), not significantly differing from August's 32.3°C (90.1°F). Throughout September nights, Ponneri records a consistent low-temperature averaging a moderately hot 27.3°C (81.1°F).Heat index
In September, the heat index is evaluated at an extremely hot 40°C (104°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. 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', offers an insight into how hot it feels when we factor in moisture content. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
In September, the average relative humidity is 72%.Rainfall
In September, the rain falls for 23.1 days. Throughout September, 98mm (3.86") of precipitation is accumulated. Throughout the year, in Ponneri, there are 157.6 rainfall days, and 823mm (32.4") of precipitation is accumulated.Daylight
In Ponneri, India, the average length of the day in September is 12h and 13min.On the first day of the month, sunrise is at 5:57 am and sunset at 6:20 pm. On the last day of September, sunrise is at 5:58 am and sunset at 5:59 pm IST.
Sunshine
The average sunshine in September is 10.7h.UV index
In Ponneri, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 7 during September translates into the following directions:
Shield from overexposure. Defense against sun-related harm is required. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
How hot is it in Ponneri in September?
What is the average humidity in September in Ponneri?
How many days does it rain in September in Ponneri?
How many hours of daylight does Ponneri have in September?
What time are sunrise and sunset in September in Ponneri?
How long on average sun shines in September in Ponneri?
How high is the UV index in September in Ponneri?
Average temperature in September
Ponneri, India
- Average high temperature in September: 31.6°C
The warmest month (with the highest average high temperature) is May (34.8°C).
The month with the lowest average high temperature is January (27.3°C).
- Average low temperature in September: 27.3°C
The month with the highest average low temperature is May (29.6°C).
The coldest month (with the lowest average low temperature) is January (23.4°C).
Average pressure in September
Ponneri, India
- Average pressure in September: 1006.7mbar
The month with the highest atmospheric pressure is January (1013.6mbar).
The month with the lowest atmospheric pressure is June (1004.2mbar).
Average wind speed in September
Ponneri, India
- Average wind speed in September: 13.7km/h
The windiest month (with the highest average wind speed) is May (19.2km/h).
The calmest months (with the lowest average wind speed) are February and October (12.8km/h).
Average humidity in September
Ponneri, India
- Average humidity in September: 72%
The month with the highest relative humidity is November (76%).
The month with the lowest relative humidity is June (63%).
Average rainfall in September
Ponneri, India
- Average rainfall in September: 98mm
The wettest month (with the highest rainfall) is November (213mm).
The driest month (with the least rainfall) is February (6mm).
Average rainfall days in September
Ponneri, India
- Average rainfall days in September: 23.1 days
The month with the highest number of rainy days is September (23.1 days).
The month with the least rainy days is February (2.9 days).
Average daylight in September /
Average sunshine in September
Ponneri, India
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is May (Average sunshine: 11h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).
Average sunshine days in September
Ponneri, India
- Average sunshine days in September: 6.2 days
The month with the most sunshine days is March (26.5 days).
The month with the least sunshine days is September (6.2 days).
Average UV index in September
Ponneri, India
- Average UV index in September: 7
The months with the highest UV index are April, May, June and July (UV index 8).
The month with the lowest UV index is October (UV index 6).
Average cloud cover in September
Ponneri, India
- Average cloud cover in September: 36
The months with the most cloud cover are July and August (Cloud cover 40).
The months with the least cloud cover are March and April (Cloud cover 12).
Average visibility in September
Ponneri, India
- 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).
Ponneri, India
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