Jeju monthly weather averages

  • Average daytime temperature

    The bar chart below shows the average monthly peak daytime temperatures at Jeju

    Jeju average temperature chart
    Average monthly temperatures in Jeju (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 6.4 7.1 10.6 15.4 19.4 22.4 26.3 27.7 24.2 19.8 14.4 9.2
    °F 43.5 44.8 51.1 59.8 66.8 72.4 79.3 81.9 75.6 67.7 57.8 48.5

    Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

  • Average rainfall & rainy days

    The graph below shows the average rainfall and number of rainy days per month.

    Average monthly rainfall in Jeju (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 59 78 97 145 155 252 280 248 180 81 76 46
    inches 2.3 3.1 3.8 5.7 6.1 9.9 11 9.8 7.1 3.2 3 1.8
    Rainy days 12 11 11 11 10 13 14 12 11 8 9 11
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in Jeju

    Average daily sunshine Jeju
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 4.4 5.2 6.5 7 7.6 6.5 6.5 7.8 6.8 7 5.8 4.6
  • Day / night temperatures

    The graph below shows the daily range of temperatures for each month.

    Maximum and minimum daily temperatures in Jeju (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C -0.1 0.3 3 7.4 11.5 15.9 20.9 21.7 17.6 12.1 6.8 2
    Max °C 6.6 7.3 10.8 15.6 19.6 22.6 26.4 27.9 24.4 20 14.5 9.4
    Min °F 31.8 32.5 37.4 45.4 52.7 60.6 69.7 71 63.6 53.8 44.2 35.7
    Max °F 37.8 38.8 44.4 52.7 59.9 66.7 74.6 76.6 69.8 60.9 51.2 42.3
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Jeju in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 14.1 12.8 12.5 13.6 16.3 20.3 24.4 27.1 25.3 22.2 19.2 16.3
    °F 57.3 55.1 54.5 56.5 61.3 68.6 75.8 80.8 77.5 72 66.5 61.4
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Jeju (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 16 16 15 14 11 11 11 11 12 12 14 15
    mph 10 10 9 8 7 7 7 7 7 8 9 9

    A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

  • Relative humidity

    The graph below shows the average relative humidity.

    Average relative humidity in Jeju
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    69% 69% 69% 74% 76% 83% 86% 82% 78% 71% 70% 70%
Jeju

Other monthly averages

Jeju weather stats

Jeju weather statistics
Hottest month: August 27.7°C 81.9°F
Driest month: December 46mm 1.8ins
Sunniest month: October 7hrs
Coldest month: January 6.4°C 43.5°F
Wettest month: July 280mm 11ins
Warmest sea: August 27.1°C 80.8°F
Map showing location of Jeju (33.50972, 126.52194)

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