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
The first month of the autumn, September, is still a warm month in Busan, South Korea, with average temperature ranging between min 19.5°C (67.1°F) and max 26.3°C (79.3°F).

Temperature

In Busan, South Korea, the average high-temperature marginally drops, from a moderately hot 29.4°C (84.9°F) in August, to a still warm 26.3°C (79.3°F). The average low-temperature, in Busan, is 19.5°C (67.1°F).

Humidity

The average relative humidity in Busan is 73.9%.

Rainfall

In September, in Busan, the rain falls for 9.3 days. Throughout September, 158mm (6.2") of precipitation is accumulated. Throughout the year, in Busan, there are 98.3 rainfall days, and 1519.1mm (59.8") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature in Busan is 24.7°C (76.5°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 24.7°C (76.5°F).

Daylight

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

Sunshine

The average sunshine in Busan, South Korea, is 5.6h.

UV index

In Busan, the average daily maximum UV index is 8. A UV Index value of 8 to 10 symbolizes a very high threat to health from unsafe exposure to the UV radiation for the average person.
In September, the average maximum UV index of 8 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in September in Busan?

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

How many days does it rain in September in Busan?

In Busan, during September, the rain falls for 9.3 days and regularly aggregates up to 158mm (6.2") of precipitation.

What is the water temperature in September in Busan?

In September, the average sea 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.

How many hours of daylight does Busan have in September?

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

How many hours of sunshine does Busan have in September?

The average sunshine in September in Busan is 5.6h.

What is the UV index intensity in September in Busan?

In Busan, the average daily maximum UV index in September is 8. A UV Index estimate of 8 to 10 represents a very high health threat from the exposure to the Sun's 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).