Donghae
South Korea
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Donghae, South Korea

September, the first month of the autumn, in Donghae, is also a moderately hot month, with average temperature fluctuating between 23.7°C (74.7°F) and 15.9°C (60.6°F).

Temperature

In Donghae, the average high-temperature marginally drops, from 27.3°C (81.1°F) in August, to a still warm 23.7°C (74.7°F). In September, in Donghae, the average low-temperature is 15.9°C (60.6°F).

Humidity

The average relative humidity in Donghae is 79%.

Rainfall

The month with the most rainfall is September when the rain falls for 11.8 days and typically aggregates up to 241.1mm (9.5") of precipitation.

Sea temperature

In September, the average sea temperature in Donghae is 22°C (71.6°F).
Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 22°C (71.6°F) water. (FYI: The Olympic swimming competition requires a water temperature between 25°C (77°F) and 28°C (82.4°F).)

Daylight

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

Sunshine

In September, the average sunshine in Donghae is 5.4h.

UV index

The average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 7 in September transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Donghae?

In Donghae, South Korea, in September, the average high-temperature is 23.7°C (74.7°F), and the average low-temperature is 15.9°C (60.6°F).

What is the average humidity in September in Donghae?

In Donghae, the average relative humidity in September is 79%.

How many days does it rain in September in Donghae?

In September, the rain falls for 11.8 days. Throughout September, 241.1mm (9.5") of precipitation is accumulated.

What is the wettest month in Donghae?

The month with the most rainfall in Donghae, South Korea, is September when the rain falls for 11.8 days and typically aggregates up to 241.1mm (9.5") of precipitation.

What is the sea temperature in September in Donghae?

In Donghae, in September, the average water temperature is 22°C (71.6°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 22°C (71.6°F) water may be enjoyable.

How many hours of daylight does Donghae have in September?

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

How many hours of sunshine does Donghae have in September?

In Donghae, the average sunshine in September is 5.4h.

How high is the UV index in September in Donghae?

In September, the average daily maximum UV index in Donghae, South Korea, is 7. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.
Average temperature in September - Donghae, South Korea
  • Average high temperature in September: 23.7°C

The warmest month (with the highest average high temperature) is August (27.3°C).
The month with the lowest average high temperature is January (5.2°C).

  • Average low temperature in September: 15.9°C

The month with the highest average low temperature is August (20.7°C).
The coldest month (with the lowest average low temperature) is January (-3.1°C).

Average humidity in September - Donghae, South Korea
  • Average humidity in September: 79%

The month with the highest relative humidity is August (82.6%).
The month with the lowest relative humidity is December (46.8%).

Average rainfall in September - Donghae, South Korea
  • Average rainfall in September: 241.1mm

The wettest month (with the highest rainfall) is September (241.1mm).
The driest month (with the lowest rainfall) is December (21.3mm).

Average rainfall days in September - Donghae, South Korea
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is August (15 days).
The month with the lowest number of rainy days is December (3.9 days).

Average sea temperature in September - Donghae, South Korea
  • Average sea temperature in September: 22°C

The best month for swimming (with the highest average sea temperature) is August (24.3°C).
The coldest month (with the lowest average sea temperature) is March (9.5°C).

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

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 5.4h

The month with most sunshine is April (Average sunshine: 7h).
The month with least sunshine is July (Average sunshine: 4.7h).

Average UV index in September - Donghae, South Korea
  • Average UV index in September: 7

The month with the highest UV index is July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).