Ulsan
South Korea
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Ulsan, South Korea

The first month of the autumn, September, is still a warm month in Ulsan, South Korea, with average temperature ranging between min 17.9°C (64.2°F) and max 25.9°C (78.6°F).

Temperature

In September, the average high-temperature marginally drops, from a hot 30°C (86°F) in August, to a moderately hot 25.9°C (78.6°F). The average low-temperature, in September, is 17.9°C (64.2°F).

Humidity

The average relative humidity in September is 75.7%.

Rainfall

In Ulsan, during September, the rain falls for 10.3 days and regularly aggregates up to 168.2mm (6.6") of precipitation. In Ulsan, during the entire year, the rain falls for 97.9 days and collects up to 1277.1mm (50.3") of precipitation.

Sea temperature

In Ulsan, the average seawater temperature is 24.1°C (75.4°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.1°C (75.4°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 Ulsan, the average length of the day in September is 12.4h.

Sunshine

In Ulsan, the average sunshine in September is 5h.

What is the temperature in September in Ulsan?

In September, in Ulsan, South Korea, the average high-temperature is 25.9°C (78.6°F), and the average low-temperature is 17.9°C (64.2°F).

What is the average humidity in September in Ulsan?

In September, the average relative humidity in Ulsan is 75.7%.

How many days does it rain in September in Ulsan?

In Ulsan, in September, during 10.3 rainfall days, 168.2mm (6.6") of precipitation is typically accumulated.

What is the sea temperature in September in Ulsan?

In Ulsan, in September, the average water temperature is 24.1°C (75.4°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.1°C (75.4°F) water.

How many hours of daylight does Ulsan have in September?

The average length of the day in September is 12.4h.

How long on average sun shines in September in Ulsan?

In September, the average sunshine in Ulsan, South Korea, is 5h.
Average temperature in September - Ulsan, South Korea
  • Average high temperature in September: 25.9°C

The warmest month (with the highest average high temperature) is August (30°C).
The month with the lowest average high temperature is January (7.3°C).

  • Average low temperature in September: 17.9°C

The month with the highest average low temperature is August (22.7°C).
The coldest month (with the lowest average low temperature) is January (-2.3°C).

Average humidity in September - Ulsan, South Korea
  • Average humidity in September: 75.7%

The month with the highest relative humidity is July (78.9%).
The month with the lowest relative humidity is January (49.6%).

Average rainfall in September - Ulsan, South Korea
  • Average rainfall in September: 168.2mm

The wettest month (with the highest rainfall) is August (240.3mm).
The driest month (with the lowest rainfall) is December (23mm).

Average rainfall days in September - Ulsan, South Korea
  • Average rainfall days in September: 10.3 days

The month with the highest number of rainy days is July (13.5 days).
The month with the lowest number of rainy days is December (3.9 days).

Average sea temperature in September - Ulsan, South Korea
  • Average sea temperature in September: 24.1°C

The best month for swimming (with the highest average sea temperature) is August (25.6°C).
The coldest month (with the lowest average sea temperature) is March (12.3°C).

Average daylight in September / Average sunshine in September - Ulsan, 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: 5h

Months with most sunshine are April and May (Average sunshine: 6.9h).
The month with least sunshine is July (Average sunshine: 4.9h).