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 another pleasant autumn month in Jeju, South Korea, with average temperature ranging between min 15.1°C (59.2°F) and max 21.3°C (70.3°F).

Temperature

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

Humidity

In Jeju, South Korea, the average relative humidity is 66.9%.

Rainfall

In Jeju, during 7 rainfall days, 80.3mm (3.2") of precipitation is typically accumulated. In Jeju, during the entire year, the rain falls for 130.2 days and collects up to 1497.7mm (59") of precipitation.

Sea temperature

In October, the average sea temperature 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).

Daylight

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

Sunshine

The average sunshine in Jeju is 5.8h.

UV index

The average daily maximum UV index in Jeju is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to the UV radiation for average individuals.
The average daily UV index of 6 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 October in Jeju?

The average high-temperature, in October, is 21.3°C (70.3°F), while the average low-temperature is 15.1°C (59.2°F).

What is the average humidity in October in Jeju?

In Jeju, South Korea, the average relative humidity in October is 66.9%.

How much does it rain in Jeju in October?

In Jeju, during October, the rain falls for 7 days and regularly aggregates up to 80.3mm (3.2") of precipitation.

How cold is the water in October in Jeju?

In Jeju, the average seawater temperature in October 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?

In Jeju, South Korea, the average sunshine in October is 5.8h.

How high is the UV index in October in Jeju?

In Jeju, the average daily maximum UV index in October is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.
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).