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
Transitioning into September, Sidoarjo experiences an average high-temperature of a still tropical 31.8°C (89.2°F), marking a minor shift from the preceding month. An average temperature of 24.5°C (76.1°F) is recorded during the nights in September.Heat index
September's mean heat index is calculated to be a fiery hot 38°C (100.4°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Heat index determinations are made taking into account the shade and light air movements. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
The average relative humidity in September is 64%.Rainfall
In Sidoarjo, in September, during 4.7 rainfall days, 8mm (0.31") of precipitation is typically accumulated. In Sidoarjo, during the entire year, the rain falls for 188.4 days and collects up to 840mm (33.07") of precipitation.Daylight
In September, the average length of the day in Sidoarjo is 12h and 4min.On the first day of the month, sunrise is at 05:29 and sunset at 17:28. On the last day of September, sunrise is at 05:14 and sunset at 17:24 WIB.
Sunshine
The months with the most sunshine are August through October, with an average of 9.9h of sunshine.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 7 translates into these guidelines:
Inhibit overexposure. Warding off sun damage is of utmost importance. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September in Sidoarjo?
How much does it rain in September?
How many hours of daylight does Sidoarjo have in September?
When are sunrise and sunset in September?
What is the month with the most sunshine?
How many hours of sunshine does Sidoarjo have in September?
What is the month with the highest UV index?
What are the months with the lowest UV index?
How high is the UV index in September?
Average temperature in September
Sidoarjo, Indonesia
- Average high temperature in September: 31.8°C
The warmest month (with the highest average high temperature) is October (32.9°C).
The months with the lowest average high temperature are January, February and July (30.1°C).
- Average low temperature in September: 24.5°C
The month with the highest average low temperature is November (26.5°C).
The coldest month (with the lowest average low temperature) is August (24.2°C).
Average pressure in September
Sidoarjo, Indonesia
- Average pressure in September: 1011.2mbar
The month with the highest atmospheric pressure is August (1011.4mbar).
The month with the lowest atmospheric pressure is December (1008.7mbar).
Average wind speed in September
Sidoarjo, Indonesia
- Average wind speed in September: 9.8km/h
The windiest month (with the highest average wind speed) is August (9.9km/h).
The calmest month (with the lowest average wind speed) is April (6.3km/h).
Average humidity in September
Sidoarjo, Indonesia
- Average humidity in September: 64%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is October (63%).
Average rainfall in September
Sidoarjo, Indonesia
- Average rainfall in September: 8mm
The wettest month (with the highest rainfall) is February (179mm).
The driest month (with the least rainfall) is August (4mm).
Average rainfall days in September
Sidoarjo, Indonesia
- Average rainfall days in September: 4.7 days
The month with the highest number of rainy days is January (27 days).
The month with the least rainy days is August (3.7 days).
Average daylight in September /
Average sunshine in September
Sidoarjo, Indonesia
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in September: 9h and 5min
The months with the most sunshine are August, September and October (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 8h and 6min).
Average sunshine days in September
Sidoarjo, Indonesia
- Average sunshine days in September: 23.3 days
The month with the most sunshine days is August (26 days).
The month with the least sunshine days is February (2.8 days).
Average UV index in September
Sidoarjo, 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
Sidoarjo, Indonesia
- Average cloud cover in September: 12
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in September
Sidoarjo, Indonesia
- Average visibility in September: 10km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January and February (9km).
