April weather forecast
Jeju, South Korea

April in Jeju brings a striking transformation as the island brightens up with temperatures reaching a pleasant high of 17.5°C (63.5°F). Spreading warmth across the island, April showcases a spring at its peak with all things beautiful proliferating around. The month, known for an impressive display of flora and fauna, invite nature lovers to relish in breathtaking landscapes rendered by cherry blossoms, camellias, and yellow rapeseed flowers. While showers become more frequent, they typically offer a scenic spectacle of rainbows against the azure skies. April's balmy weather coupled with longer days make it an ideal month for sightseeing and exploring the island's attractions.

Temperature

In April, the average high-temperature marginally rises from a fresh 12.8°C (55°F) in March to a refreshing 17.5°C (63.5°F). The month of April records an average low-temperature of 10.2°C (50.4°F).

Humidity

In Jeju, the average relative humidity in April is 66.5%.

Rainfall

In April, the rain falls for 10 days. Throughout April, 90mm (3.54") of precipitation is accumulated. 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 April is 14.7°C (58.5°F).
Note: Swimming in 14.7°C (58.5°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation.

Daylight

In April, the average length of the day is 13h and 1min.
On the first day of April, sunrise is at 06:21 and sunset at 18:54. On the last day of the month, sunrise is at 05:46 and sunset at 19:15 KST.

Sunshine

The average sunshine in April is 6.5h.

UV index

In April, the average daily maximum UV index is 8. A UV Index of 8 to 10 symbolizes a very high health risk from exposure to the Sun's UV rays for the average person.
Note: In April, a daily maximum UV index of 8 leads to the following instructions:
Be sure to take precautions. Without protection, skin might suffer damage quickly. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.