September weather forecastBarus, Indonesia

September

Weather in September

The first month of the autumn, September, is still a warm month in Barus, Indonesia, with an average temperature varying between 28°C (82.4°F) and 21.5°C (70.7°F).

Temperature

Barus's shift into September is marked by a subtle change to a still warm 28°C (82.4°F) from August's 28.6°C (83.5°F) in temperature. Throughout September, an average low-temperature of 21.5°C (70.7°F) is expected.

Heat index

In September, the average heat index is appraised at a hot 32°C (89.6°F). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.

Humidity

In Barus, the average relative humidity in September is 80%.

Rainfall

In Barus, in September, during 22.5 rainfall days, 118mm (4.65") of precipitation is typically accumulated. Throughout the year, there are 285.3 rainfall days, and 1792mm (70.55") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 8min.
On the first day of the month, sunrise is at 06:21 and sunset at 18:30. On the last day of September, sunrise is at 06:13 and sunset at 18:19 WIB.

Sunshine

In September, the average sunshine is 8.3h.

UV index

January through December, with an average maximum UV index of 6, are months with the highest UV index. January through December, with an average maximum UV index of 6, 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 ordinary individuals.
Note: The daily high UV index of 6 during September translates into the following recommendations:
Shield from overexposure. Defense against sun-related harm is required. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.

Updated: Aug 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature and low-temperature in Barus during September are 28°C (82.4°F) and 21.5°C (70.7°F) respectively. In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, is appraised at 32°C (89.6°F).

In September, the average relative humidity is 80%.

In Barus, in September, it is raining for 22.5 days, with typically 118mm (4.65") of accumulated precipitation.

In September, the average day length is 12h and 8min.

In September, on the first day of the month, sunrise is at 06:21 and sunset at 18:30. On the last day of the month, sunrise is at 06:13 and sunset at 18:19 WIB.

In Barus, the average sunshine duration in September is 8.3h.

January through December, with an average maximum UV index of 6, are months with the highest UV index.

January through December, with an average maximum UV index of 6, are months with the lowest UV index.

In Barus, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

28.6°C

28°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6km/h

5.8km/h

6.1km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

7.3

5.1

3.7

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Barus, Indonesia

Average high temperature in September: 28°C

The warmest month (with the highest average high temperature) is May (28.9°C).
The month with the lowest average high temperature is November (27.3°C).

Average low temperature in September: 21.5°C

The month with the highest average low temperature is May (22.5°C).
The coldest months (with the lowest average low temperature) are July and September (21.5°C).

Average pressure in September
Barus, Indonesia

Average pressure in September: 1011mbar

The month with the highest atmospheric pressure is September (1011mbar).
The month with the lowest atmospheric pressure is May (1009.9mbar).

Average wind speed in September
Barus, Indonesia

Average wind speed in September: 5.3km/h

The windiest month (with the highest average wind speed) is June (5.6km/h).
The calmest month (with the lowest average wind speed) is April (4.7km/h).

Average humidity in September
Barus, Indonesia

Average humidity in September: 80%

The month with the highest relative humidity is November (84%).
The months with the lowest relative humidity are June and July (78%).

Average rainfall in September
Barus, Indonesia

Average rainfall in September: 118mm

The wettest month (with the highest rainfall) is November (259mm).
The driest month (with the least rainfall) is June (82mm).

Average rainfall days in September
Barus, Indonesia

Average rainfall days in September: 22.5 days

The months with the highest number of rainy days are March and November (27.2 days).
The month with the least rainy days is June (17.2 days).

Average daylight in September /
Average sunshine in September
Barus, Indonesia

Average daylight in September: 12h and 6min

The month with the longest days is June (Average daylight: 12h and 12min).
The month with the shortest days is December (Average daylight: 12h and 0min).

Average sunshine in September: 8h and 18min

The month with the most sunshine is June (Average sunshine: 9h and 0min).
The month with the least sunshine is November (Average sunshine: 7h and 0min).

Average sunshine days in September
Barus, Indonesia

Average sunshine days in September: 5.1 days

The month with the most sunshine days is June (11.4 days).
The month with the least sunshine days is November (1.8 days).

Average UV index in September
Barus, Indonesia

Average UV index in September: 6

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).

Average cloud cover in September
Barus, Indonesia

Average cloud cover in September: 41

The month with the most cloud cover is November (Cloud cover 55).
The month with the least cloud cover is June (Cloud cover 33).

Average visibility in September
Barus, Indonesia

Average visibility in September: 10km

The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, April, October, November and December (9km).