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 still a warm month, with temperature in the range of an average low of 15.9°C (60.6°F) and an average high of 23.7°C (74.7°F).

Temperature

In Donghae, South Korea, the average high-temperature slightly decreases, from 27.3°C (81.1°F) in August, to a still moderately hot 23.7°C (74.7°F). The average low-temperature, is 15.9°C (60.6°F).

Humidity

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

Rainfall

The month with the most rainfall in Donghae 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 is 22°C (71.6°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 22°C (71.6°F).

Daylight

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

Sunshine

In Donghae, the average sunshine is 5.4h.

UV index

In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the Sun's UV rays for the average person.
In September, the average maximum UV index of 7 translate into the following recommendations:
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. 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 strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Donghae?

In Donghae, 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 much does it rain in Donghae in September?

In Donghae, South Korea, in September, it is raining for 11.8 days, with typically 241.1mm (9.5") of accumulated precipitation.

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.

How warm is the water in September in Donghae?

In Donghae, the average seawater temperature in September is 22°C (71.6°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 22°C (71.6°F).

How many hours of daylight does Donghae have in September?

The average length of the day in September in Donghae, South Korea, is 12.4h.

How many hours of sunshine does Donghae have in September?

The average sunshine in September in Donghae is 5.4h.

What is the UV index intensity in September in Donghae?

In Donghae, South Korea, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from unprotected exposure to the UV radiation.
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).