September weather forecastBelawan, Indonesia
September
Weather in September
The first month of the autumn, September, is still a hot month in Belawan, Indonesia, with an average temperature fluctuating between 31.3°C (88.3°F) and 24.7°C (76.5°F).Temperature
September's arrival shows an average high-temperature of a still tropical 31.3°C (88.3°F), hardly different from the previous month. Nightly temperatures drop to an average low of 24.7°C (76.5°F) in September.Heat index
The average heat index in September is estimated at a blistering 40°C (104°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. 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 hold great significance to children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.
Humidity
The average relative humidity in September in Belawan is 76%.Rainfall
In Belawan, in September, it is raining for 27.8 days, with typically 117mm (4.61") of accumulated precipitation. Throughout the year, there are 317.8 rainfall days, and 1437mm (56.57") of precipitation is accumulated.Sea temperature
In Belawan, in September, the average water temperature is 29.6°C (85.3°F).Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.
Daylight
In Belawan, the average length of the day in September is 12h and 8min.On the first day of the month, sunrise is at 06:19 and sunset at 18:30. On the last day of September, sunrise is at 06:12 and sunset at 18:17 WIB.
Sunshine
In September, the average sunshine is 8.8h.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 exposure to the Sun's UV rays for the ordinary person.Note: In September, a regular UV index of 7 translates into these guidelines:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Note! Reflective surfaces like sand and water heighten the UV radiation levels.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Belawan, Indonesia
- Average high temperature in September: 31.3°C
The warmest months (with the highest average high temperature) are May and June (31.9°C).
The month with the lowest average high temperature is December (29.7°C).
- Average low temperature in September: 24.7°C
The month with the highest average low temperature is April (25.6°C).
The coldest month (with the lowest average low temperature) is January (24.1°C).
Average pressure in September
Belawan, Indonesia
- Average pressure in September: 1010.6mbar
The month with the highest atmospheric pressure is January (1010.9mbar).
The month with the lowest atmospheric pressure is May (1009.5mbar).
Average wind speed in September
Belawan, Indonesia
- Average wind speed in September: 6.7km/h
The windiest month (with the highest average wind speed) is February (7.8km/h).
The calmest month (with the lowest average wind speed) is September (6.7km/h).
Average humidity in September
Belawan, Indonesia
- Average humidity in September: 76%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are March, June, July and August (75%).
Average rainfall in September
Belawan, Indonesia
- Average rainfall in September: 117mm
The wettest month (with the highest rainfall) is October (158mm).
The driest month (with the least rainfall) is February (88mm).
Average rainfall days in September
Belawan, Indonesia
- Average rainfall days in September: 27.8 days
The month with the highest number of rainy days is October (28.7 days).
The month with the least rainy days is February (21.3 days).
Average sea temperature in September
Belawan, Indonesia
- Average sea temperature in September: 29.6°C
The best month for swimming (with the highest average sea temperature) is May (30.2°C).
The coldest month (with the lowest average sea temperature) is January (28.8°C).
Average daylight in September /
Average sunshine in September
Belawan, Indonesia
- Average daylight in September: 12h and 6min
The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 11h and 54min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is June (Average sunshine: 9h and 18min).
The months with the least sunshine are November and December (Average sunshine: 8h and 0min).
Average sunshine days in September
Belawan, Indonesia
- Average sunshine days in September: 1.5 days
The months with the most sunshine days are January and February (5 days).
The month with the least sunshine days is April (0.9 days).
Average UV index in September
Belawan, 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
Belawan, Indonesia
- Average cloud cover in September: 39
The month with the most cloud cover is November (Cloud cover 47).
The months with the least cloud cover are March and June (Cloud cover 31).
Average visibility in September
Belawan, Indonesia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (10km).
The month with the lowest visibility is November (9km).
