Busan
South Korea
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Busan, South Korea

The Haedong Yonggungsa Temple set on a beautiful hillside in Busan, South Korea
The Haedong Yonggungsa Temple set on a beautiful hillside in Busan, South Korea
September, the first month of the autumn, in Busan, is also a moderately hot month, with temperature in the range of an average high of 26.3°C (79.3°F) and an average low of 19.5°C (67.1°F).

Temperature

In Busan, the average high-temperature slightly decreases, from 29.4°C (84.9°F) in August, to a still warm 26.3°C (79.3°F). In September, in Busan, South Korea, the average low-temperature is 19.5°C (67.1°F).

Humidity

In Busan, the average relative humidity is 73.9%.

Rainfall

In September, in Busan, the rain falls for 9.3 days. Throughout September, 158mm (6.2") of precipitation is accumulated. In Busan, during the entire year, the rain falls for 98.3 days and collects up to 1519.1mm (59.8") of precipitation.

Sea temperature

In Busan, South Korea, the average seawater temperature in September is 24.7°C (76.5°F).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.7°C (76.5°F) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).)

Daylight

In September, the average length of the day in Busan is 12.4h.

Sunshine

In September, the average sunshine in Busan is 5.6h.

UV index

In Busan, the average daily maximum UV index in September is 8. A UV Index of 8 to 10 symbolizes a very high health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 8 translate into the following recommendations:
Take special precautions, as unprotected skin can be damaged and can burn quickly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Busan?

In Busan, in September, the average high-temperature is 26.3°C (79.3°F), and the average low-temperature is 19.5°C (67.1°F).

What is the average humidity in September in Busan?

In Busan, the average relative humidity in September is 73.9%.

How many days does it rain in September in Busan?

In Busan, in September, it is raining for 9.3 days, with typically 158mm (6.2") of accumulated precipitation.

How warm is the water in September in Busan?

In Busan, in September, the average water temperature is 24.7°C (76.5°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.7°C (76.5°F) water may be enjoyable.

What is the average length of the day in September in Busan?

In September, the average length of the day in Busan is 12.4h.

How long on average sun shines in September in Busan?

In Busan, the average sunshine in September is 5.6h.

What is the UV index reading in September in Busan?

In Busan, South Korea, the average daily maximum UV index in September is 8. A UV Index estimate of 8 to 10 represents a very high health risk from unprotected exposure to the UV radiation.
Average temperature in September - Busan, South Korea
  • Average high temperature in September: 26.3°C

The warmest month (with the highest average high temperature) is August (29.4°C).
The month with the lowest average high temperature is January (7.8°C).

  • Average low temperature in September: 19.5°C

The month with the highest average low temperature is August (23.4°C).
The coldest month (with the lowest average low temperature) is January (-0.6°C).

Average humidity in September - Busan, South Korea
  • Average humidity in September: 73.9%

The month with the highest relative humidity is July (84.3%).
The month with the lowest relative humidity is January (48.3%).

Average rainfall in September - Busan, South Korea
  • Average rainfall in September: 158mm

The wettest month (with the highest rainfall) is July (316.9mm).
The driest month (with the lowest rainfall) is December (22.8mm).

Average rainfall days in September - Busan, South Korea
  • Average rainfall days in September: 9.3 days

The month with the highest number of rainy days is July (13.6 days).
The month with the lowest number of rainy days is December (4.2 days).

Average sea temperature in September - Busan, South Korea
  • Average sea temperature in September: 24.7°C

The best month for swimming (with the highest average sea temperature) is August (26.3°C).
The coldest month (with the lowest average sea temperature) is March (13.3°C).

Average daylight in September / Average sunshine in September - Busan, South Korea
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 5.6h

The month with most sunshine is May (Average sunshine: 7.2h).
The month with least sunshine is July (Average sunshine: 5.3h).

Average UV index in September - Busan, South Korea
  • Average UV index in September: 8

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 2).