Jeju-do Island, South Korea: Annual Weather Averages

August is the hottest month in Jeju-do Island with an average temperature of 26.5°C (80°F) and the coldest is January at 6°C (43°F) with the most daily sunshine hours at 9 in August. The wettest month is July with an average of 328mm of rain. The best month to swim in the sea is in August when the average sea temperature is 28°C (82°F).

Average Temperature: Jeju-do Island

Loading weather data. Please wait…

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6 7 9 14 18 21 26 27 23 18 13 8
°F 43 44 48 56 64 70 78 80 73 64 55 46

Average High/Low Temperature: Jeju-do Island

Loading weather data. Please wait…

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High °C 8 9 12 17 21 24 28 29 25 21 16 10
Low °C 6 7 9 14 18 21 26 27 23 18 13 8
High °F 46 48 54 63 70 75 82 84 77 70 61 50
Low °F 43 44 48 56 64 70 78 80 73 64 55 46

Average Rainfall: Jeju-do Island

Loading weather data. Please wait…

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 22 24 46 77 102 133 328 248 138 49 53 25
Days 12 10 12 11 12 13 12 12 12 7 9 11

Average Daily Sunshine Hours: Jeju-do Island

Loading weather data. Please wait…

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hours 4 6 7 9 9 9 9 9 8 8 7 5

Average Sea Temperature: Jeju-do Island

Loading weather data. Please wait…

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 15 14 14 15 17 21 25 28 26 23 20 18
°F 59 57 57 59 63 70 77 82 79 73 68 64

Your Holiday Weather Settings

Show temperature in:
Show distance in: