September weather forecastSei Mati, Indonesia
September
Weather in September
The first month of the autumn, September, is still a hot month in Sei Mati, Indonesia, with an average temperature ranging between min 24.7°C (76.5°F) and max 31.3°C (88.3°F).Temperature
Sei Mati's September average high-temperature settles at a still hot 31.3°C (88.3°F), showing a near match with the preceding month. In Sei Mati, an average temperature of 24.7°C (76.5°F) is noted during September nights.Heat index
The heat index value for September is evaluated at a blisteringly hot 40°C (104°F). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.Note that heat index values are valued for light wind and location in the shade. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', quantifies the warmth felt when relative humidity is considered. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. 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 exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
In September, the average relative humidity is 76%.Rainfall
In Sei Mati, 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.Daylight
In September, the average length of the day is 12h and 8min.On the first day of September, sunrise is at 06:19 and sunset at 18:30. On the last day of the month, sunrise is at 06:12 and sunset at 18:17 WIB.
Sunshine
In Sei Mati, the average sunshine in September is 8.8h.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 7 during September translates into the following guidance:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sei Mati, 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
Sei Mati, 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
Sei Mati, 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
Sei Mati, 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
Sei Mati, 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
Sei Mati, 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 daylight in September /
Average sunshine in September
Sei Mati, 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
Sei Mati, 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
Sei Mati, 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
Sei Mati, 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
Sei Mati, 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).
