Jeju
South Korea
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Jeju, South Korea

A high sunrise Panorama of the Jeju Island in Jeju, South Korea
A high sunrise Panorama of the Jeju Island in Jeju, South Korea
October, like September, is an agreeable autumn month in Jeju, South Korea, with average temperature ranging between max 21.3°C (70.3°F) and min 15.1°C (59.2°F).

Temperature

In October, the average high-temperature slightly decreases, from a warm 25.8°C (78.4°F) in September, to a pleasant 21.3°C (70.3°F). The average low-temperature, in October, is 15.1°C (59.2°F).

Humidity

In Jeju, the average relative humidity is 66.9%.

Rainfall

In Jeju, during 7 rainfall days, 80.3mm (3.2") of precipitation is typically accumulated. Throughout the year, in Jeju, there are 130.2 rainfall days, and 1497.7mm (59") of precipitation is accumulated.

Sea temperature

In October, the average sea temperature is 21.8°C (71.2°F).
Note: Swimming in 21.8°C (71.2°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

In Jeju, the average length of the day is 11.3h.

Sunshine

The average sunshine in October is 5.8h.

UV index

In October, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 6 in October interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 October in Jeju?

In Jeju, South Korea, in October, the average high-temperature is 21.3°C (70.3°F), and the average low-temperature is 15.1°C (59.2°F).

What is the average humidity in October in Jeju?

The average relative humidity in October is 66.9%.

How many days does it rain in October in Jeju?

In Jeju, South Korea, in October, it is raining for 7 days, with typically 80.3mm (3.2") of accumulated precipitation.

What is the sea water temperature in October in Jeju?

In October, the average sea temperature in Jeju is 21.8°C (71.2°F). For swimming, a surface water temperature of 21.8°C (71.2°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

What is the average length of the day in October in Jeju?

In Jeju, the average length of the day in October is 11.3h.

How many hours of sunshine does Jeju have in October?

The average sunshine in October is 5.8h.

How high is the UV index in October in Jeju?

In October, the average daily maximum UV index in Jeju, South Korea, is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in October - Jeju, South Korea
  • Average high temperature in October: 21.3°C

The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (8.3°C).

  • Average low temperature in October: 15.1°C

The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is January (3.2°C).

Average humidity in October - Jeju, South Korea
  • Average humidity in October: 66.9%

The month with the highest relative humidity is July (78.3%).
Months with the lowest relative humidity are February and March (64.9%).

Average rainfall in October - Jeju, South Korea
  • Average rainfall in October: 80.3mm

The wettest month (with the highest rainfall) is August (262.5mm).
The driest month (with the lowest rainfall) is December (47.7mm).

Average rainfall days in October - Jeju, South Korea
  • Average rainfall days in October: 7 days

The month with the highest number of rainy days is August (13.5 days).
The month with the lowest number of rainy days is October (7 days).

Average sea temperature in October - Jeju, South Korea
  • Average sea temperature in October: 21.8°C

The best month for swimming (with the highest average sea temperature) is August (26.2°C).
The coldest month (with the lowest average sea temperature) is March (13.3°C).

Average daylight in October / Average sunshine in October - Jeju, South Korea
  • Average daylight in October: 11.3h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in October: 5.8h

The month with most sunshine is May (Average sunshine: 6.8h).
The month with least sunshine is January (Average sunshine: 2.3h).

Average UV index in October - Jeju, South Korea
  • Average UV index in October: 6

The month with the highest UV index is July (UV index 11).
Months with the lowest UV index are January and December (UV index 3).