October weather forecast
Jeju, South Korea

October manifests the quintessential autumn in Jeju and comes with a noticeable drop in temperatures, which offer relief after the sweltering summer months. The month brings a refreshing feel, a blend of mild sunny days and nippy evenings. It's a time when the deciduous trees across the island put on an enchanting display of fall colors, presenting an incredible scenery. Rainfall decreases significantly, making way for clear, blue skies that perfectly complement the colorful landscapes. October stimulates a sense of tranquility and peace in Jeju, allowing just the right setup for nature walks and outdoor relaxation.

Temperature

The average high-temperature slightly decreases in October, shifting from a warm 25.8°C (78.4°F) in September to an agreeable 21.3°C (70.3°F). During October, the nighttime temperature averages to a mild 15.1°C (59.2°F).

Humidity

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

Rainfall

In Jeju, during October, the rain falls for 7 days and regularly aggregates up to 80mm (3.15") of precipitation. In Jeju, during the entire year, the rain falls for 130.2 days and collects up to 1498mm (58.98") of precipitation.

Sea temperature

In Jeju, the average seawater temperature in October is 21.8°C (71.2°F).
Note: 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 October, the average length of the day is 11h and 21min.
On the first day of October in Jeju, sunrise is at 06:28 and sunset at 18:18. On the last day of the month, sunrise is at 06:51 and sunset at 17:43 KST.

Sunshine

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

UV index

In Jeju, the average daily maximum UV index in October is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: An average UV index of 6 in October transforms into this advice:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Warning! Sand and water reflections boost the intensity of UV exposure.