2020-08-01 (SATURDAY) | Jeju Olle Trail Daily Update

There are no guided walks or trail cleaning events until September


Today’s Olle Image

“Sunflowers and sky…” in Andeok-myeon, Seogwipo. Posted by Yonhap News on July 31.


Weather Summary

We have a continued high of 33°C and sunshine. Another light to gentle wind (3-4 m/s) is going to blow north.

Overall the HOT days are here to stay on the trail. Walkers should now be fully prepared for summer walking. Consider starting not long after dawn and finishing before the heat of the day arrives.


Sunrise: 05:47 // Sunset: 19:34

The PM 2.5 micro fine dust level is GOOD (07:00 KST)

The PM 10 fine dust level is GOOD (07:00 KST)

The UV level is VERY HIGH (early morning) / NORMAL (morning) / VERY HIGH (afternoon)


Please refer to the Jeju Environment Protection Research Center (http://air.jeju.go.kr/index.htm)

Air Korea (https://bit.ly/2taWZp5) has excellent maps showing the real-time influence of fine dust.

Ultraviolet index for South Korea and Jeju Island can be checked here.


Jeju Island News


Translated with Google Translate and edited for unclear meanings


[2020 Jeju Island rainy season characteristics]

The longest ever in Jeju Island

Since records began in 1973, the rainy season period is 49 days (1st place), the rainy season start date is 6.10. (1st place), the number of precipitation days is 29.5 days (1st place)

In 2020, the rainy season in Jeju Island began on June 10, 9-10 days earlier than the normal year, and ended on July 28, 7-8 days later than the average year. This year’s rainy season has been the longest since 2011 with official records starting in 1973, and the rainy season has been the longest since 1973 with 49 days, 17 days longer than the average (32 days) (2nd place: 47 days, 1998).

2020 Rainy Season | Start: 6.10 | End: 7.28 | Length(days) 49

Average Year Rainy Season | Start: 6.19-6.20 | End: 7.20-7.21 | Length(days) 32

Graph Explained: Blue bar – precipitation amount (mm) | Orange line – rainy season length in days (see right side of graph for amount) | Green line – days with precipitation during rainy season (see right side of graph for amount)

[Number of days of precipitation] The number of days of precipitation during the rainy season in Jeju Island in 2020 was 29.5 days, ranking the first with 1974, and it rained once every 1.7 days.

[Precipitation] The precipitation in Jeju rainy season in 2020 was 562.4mm (398.6mm per year), ranking 10th in the past, and rained 1.4 times more than the rainy season during the year.


2020 Rainy Season

Jeju | 28 days with precipitation and 405.3 mm

Seogwipo | 31 days with precipitation and 719.4 mm

Jeju Island |29.5 days with precipitation and 562.4 mm

Average Year Rainy Season

Jeju | 17.3 days with precipitation and 339.9 mm

Seogwipo |19.3 days with precipitation and 457.3 mm

Jeju Island |18.3 days with precipitation and 398.6 mm


As the cold air around the country stagnated, the warm and humid air of the North Pacific High Pressure could not be overturned and remained in the south of Japan. As this stagnant front was frequently activated in the vicinity of Jeju Island, the rainy season continued for a long time, and it was cooler than usual due to frequent cloudy or rainy days.


Average temperature during the rainy season in Jeju in 2020
Green line – average temperature | Red area – above average | Blue area – below average


Jeju Island’s all-time rainy season rankings and statistics (1973-2020)

Source: http://web.kma.go.kr/notify/press/reqional_list.jsp?bid=press2&mode=view&num=11190&page=1&field=&text=&schGrp=%C1%A6%C1%D6%C3%BB