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
September
Weather in September
Temperature
September's onset brings an average high-temperature of a still tropical 32.4°C (90.3°F), showing a minute difference from August's 32.6°C (90.7°F). In Siak Sri Indrapura, the September nights cool down to an average low of 24.6°C (76.3°F).Heat index
September's average heat index is calculated to be a life-threatening hot 45°C (113°F). Stay alert: Heat cramps and heat exhaustion are expected. Heatstroke is a likely outcome of ongoing activity.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.
Humidity
In Siak Sri Indrapura, the average relative humidity in September is 77%.Rainfall
In Siak Sri Indrapura, in September, during 25 rainfall days, 65mm (2.56") of precipitation is typically accumulated. Throughout the year, there are 262.5 rainfall days, and 853mm (33.58") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 7min.On the first day of the month, sunrise is at 06:07 and sunset at 18:15. On the last day of September, sunrise is at 05:58 and sunset at 18:04 WIB.
Sunshine
September has the most sunshine of the year, with an average of 9.1h of sunshine.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily UV index of 7 turns into the following recommendations:
Fend off overexposure. Sun protection is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September in Siak Sri Indrapura?
How many days does it rain in September?
How many hours of daylight does Siak Sri Indrapura have in September?
When is the sunrise / sunset in September?
What month has the most sunshine in Siak Sri Indrapura?
How long on average sun shines in September?
What are the months with the highest UV index?
What is the month with the lowest UV index in Siak Sri Indrapura?
How high is the UV index in September?
Average temperature in September
Siak Sri Indrapura, Indonesia
- Average high temperature in September: 32.4°C
The warmest month (with the highest average high temperature) is May (32.8°C).
The month with the lowest average high temperature is January (30.3°C).
- Average low temperature in September: 24.6°C
The months with the highest average low temperature are April and May (25.2°C).
The coldest month (with the lowest average low temperature) is January (24.3°C).
Average pressure in September
Siak Sri Indrapura, Indonesia
- Average pressure in September: 1009.7mbar
The month with the highest atmospheric pressure is February (1010.2mbar).
The month with the lowest atmospheric pressure is May (1008.6mbar).
Average wind speed in September
Siak Sri Indrapura, Indonesia
- Average wind speed in September: 5.9km/h
The windiest month (with the highest average wind speed) is January (7.6km/h).
The calmest month (with the lowest average wind speed) is April (5.1km/h).
Average humidity in September
Siak Sri Indrapura, Indonesia
- Average humidity in September: 77%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (76%).
Average rainfall in September
Siak Sri Indrapura, Indonesia
- Average rainfall in September: 65mm
The wettest month (with the highest rainfall) is November (100mm).
The driest month (with the least rainfall) is February (37mm).
Average rainfall days in September
Siak Sri Indrapura, Indonesia
- Average rainfall days in September: 25 days
The month with the highest number of rainy days is May (25.1 days).
The month with the least rainy days is February (15.3 days).
Average daylight in September /
Average sunshine in September
Siak Sri Indrapura, Indonesia
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 12min).
The month with the shortest days is December (Average daylight: 12h and 6min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is September (Average sunshine: 9h and 6min).
The month with the least sunshine is November (Average sunshine: 7h and 6min).
Average sunshine days in September
Siak Sri Indrapura, Indonesia
- Average sunshine days in September: 2.7 days
The month with the most sunshine days is January (9 days).
The month with the least sunshine days is September (2.7 days).
Average UV index in September
Siak Sri Indrapura, Indonesia
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Siak Sri Indrapura, Indonesia
- Average cloud cover in September: 39
The months with the most cloud cover are November and December (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 38).
Average visibility in September
Siak Sri Indrapura, Indonesia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, June, August, September and October (10km).
The months with the lowest visibility are April, May, July, November and December (9km).
