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

September weather forecast and climate
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: 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: 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: 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: 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: 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: 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).

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