September weather forecast
Semolowaru, Indonesia

September

Weather in September

The first month of the spring, September, is also a hot month in Semolowaru, Indonesia, with temperature in the range of an average high of 31.7°C (89.1°F) and an average low of 24.4°C (75.9°F).

Temperature

Semolowaru experiences an average high-temperature of a still tropical 31.7°C (89.1°F) in September, subtly different from August's 30.8°C (87.4°F). During the month of September, Semolowaru experiences a steady low-temperature average of 24.4°C (75.9°F).

Heat index

The heat index for September is evaluated at a fiery hot 38°C (100.4°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. 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 'feels like' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In September, the average relative humidity is 65%.

Rainfall

In Semolowaru, in September, during 4.1 rainfall days, 8mm (0.31") of precipitation is typically accumulated. In Semolowaru, during the entire year, the rain falls for 187.8 days and collects up to 839mm (33.03") of precipitation.

Daylight

The average length of the day in September 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 05:13 and sunset at 17:23 WIB.

Sunshine

August through October, with an average of 9.9h of sunshine, are months with the most sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In September, an average UV index of 7 transforms into the following instructions:
Guard against overexposure. Protection from sun-induced harm is essential. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.

Frequently asked questions

How hot is it in September?
In September, in Semolowaru, the average high-temperature is 31.7°C (89.1°F), and the average low-temperature is 24.4°C (75.9°F). The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is evaluated at 38°C (100.4°F).
What is the average humidity in September in Semolowaru?
The average relative humidity in September is 65%.
How much does it rain in September?
In Semolowaru, in September, during 4.1 rainfall days, 8mm (0.31") of precipitation is typically accumulated.
How many hours of daylight does Semolowaru have in September?
In September, the average day length is 12h and 4min.
What time are sunrise and sunset in September?
On the first day of September, sunrise is at 05:29 and sunset at 17:28. On the last day of the month, sunrise is at 05:13 and sunset at 17:23 WIB.
What is the month with the most sunshine?
August through October, with an average of 9.9h of sunshine, are months with the most sunshine.
How long on average sun shines in September?
In September, the average sunshine duration is 9.9h.
What are the months with the highest UV index?
January through December, with an average maximum UV index of 7, are months with the highest UV index.
What are the months with the lowest UV index?
January through December, with an average maximum UV index of 7, are months with the lowest UV index.
How high is the UV index in September?
In Semolowaru, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Semolowaru, Indonesia
  • Average high temperature in September: 31.7°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: 24.4°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
Semolowaru, Indonesia
  • Average pressure in September: 1011.3mbar

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
Semolowaru, Indonesia
  • Average wind speed in September: 9.7km/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
Semolowaru, Indonesia
  • Average humidity in September: 65%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is October (63%).

Average rainfall in September
Semolowaru, 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
Semolowaru, Indonesia
  • Average rainfall days in September: 4.1 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
Semolowaru, 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
Semolowaru, Indonesia
  • Average sunshine days in September: 23.7 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
Semolowaru, 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
Semolowaru, 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
Semolowaru, 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).

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