September weather forecastInsrom, Indonesia
September
Weather in September
September, the first month of the spring in Insrom, is still a warm month, with an average temperature varying between 25.5°C (77.9°F) and 29.2°C (84.6°F).Temperature
September's advent presents an average high-temperature of a still warm 29.2°C (84.6°F), indicating a slight variation from the conditions of the previous month. September nights in Insrom register a minor temperature decline, steadying at a still warm 25.5°C (77.9°F).Heat index
The average heat index in September is calculated to be a fiery hot 35°C (95°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.It is important to note that the heat index values are for shaded areas and light wind scenarios. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.
Humidity
In September, the average relative humidity is 78%.Rainfall
In September, the rain falls for 25.8 days. Throughout September, 135mm (5.31") of precipitation is accumulated. Throughout the year, there are 323.4 rainfall days, and 2132mm (83.94") of precipitation is accumulated.Sea temperature
In Insrom, the average seawater temperature in September is 29.6°C (85.3°F).Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.
Daylight
In Insrom, the average length of the day in September is 12h and 7min.On the first day of September, sunrise is at 05:53 and sunset at 17:58. On the last day of the month, sunrise is at 05:42 and sunset at 17:49 WIT.
Sunshine
In September, the average sunshine is 8.2h.UV index
The months with the highest UV index are January, March through November, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 7 in September interprets into the following advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Insrom, Indonesia
- Average high temperature in September: 29.2°C
The warmest month (with the highest average high temperature) is November (30°C).
The month with the lowest average high temperature is July (29.1°C).
- Average low temperature in September: 25.5°C
The month with the highest average low temperature is November (26.4°C).
The coldest months (with the lowest average low temperature) are August and September (25.5°C).
Average pressure in September
Insrom, Indonesia
- Average pressure in September: 1009.3mbar
The months with the highest atmospheric pressure are August and September (1009.3mbar).
The month with the lowest atmospheric pressure is December (1007.5mbar).
Average wind speed in September
Insrom, Indonesia
- Average wind speed in September: 8.1km/h
The windiest month (with the highest average wind speed) is March (10km/h).
The calmest month (with the lowest average wind speed) is August (7.5km/h).
Average humidity in September
Insrom, Indonesia
- Average humidity in September: 78%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is October (77%).
Average rainfall in September
Insrom, Indonesia
- Average rainfall in September: 135mm
The wettest month (with the highest rainfall) is March (243mm).
The driest month (with the least rainfall) is November (125mm).
Average rainfall days in September
Insrom, Indonesia
- Average rainfall days in September: 25.8 days
The month with the highest number of rainy days is January (29 days).
The month with the least rainy days is October (22.8 days).
Average sea temperature in September
Insrom, Indonesia
- Average sea temperature in September: 29.6°C
The best month for swimming (with the highest average sea temperature) is November (30°C).
The coldest months (with the lowest average sea temperature) are February and March (29.3°C).
Average daylight in September /
Average sunshine in September
Insrom, Indonesia
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 12min).
The month with the shortest days is June (Average daylight: 12h and 6min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is August (Average sunshine: 9h and 6min).
The months with the least sunshine are February and June (Average sunshine: 7h and 42min).
Average sunshine days in September
Insrom, Indonesia
- Average sunshine days in September: 2.8 days
The month with the most sunshine days is October (7 days).
The month with the least sunshine days is April (1 days).
Average UV index in September
Insrom, Indonesia
- Average UV index in September: 7
The months with the highest UV index are January, March, April, May, June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are February and December (UV index 6).
Average cloud cover in September
Insrom, Indonesia
- Average cloud cover in September: 40
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is October (Cloud cover 37).
Average visibility in September
Insrom, Indonesia
- Average visibility in September: 10km
The months with the highest visibility are February, June, September, October, November and December (10km).
The months with the lowest visibility are January, March, April, May, July and August (9km).





