Jeju climate guide

Temperature in Jeju (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
8°C maximum daytime temperature in January in Jeju8
9°C maximum daytime temperature in February in Jeju9
12°C maximum daytime temperature in March in Jeju12
17°C maximum daytime temperature in April in Jeju17
21°C maximum daytime temperature in May in Jeju21
24°C maximum daytime temperature in June in Jeju24
28°C maximum daytime temperature in July in Jeju28
29°C maximum daytime temperature in August in Jeju29
26°C maximum daytime temperature in September in Jeju26
21°C maximum daytime temperature in October in Jeju21
16°C maximum daytime temperature in November in Jeju16
11°C maximum daytime temperature in December in Jeju11
Min temperature (night-time)
1°C minimum night-time temperature in January in Jeju1
2°C minimum night-time temperature in February in Jeju2
4°C minimum night-time temperature in March in Jeju4
9°C minimum night-time temperature in April in Jeju9
13°C minimum night-time temperature in May in Jeju13
17°C minimum night-time temperature in June in Jeju17
22°C minimum night-time temperature in July in Jeju22
23°C minimum night-time temperature in August in Jeju23
19°C minimum night-time temperature in September in Jeju19
13°C minimum night-time temperature in October in Jeju13
8°C minimum night-time temperature in November in Jeju8
3°C minimum night-time temperature in December in Jeju3
Sea temperature
15°C sea temperature in January in Jeju15
14°C sea temperature in February in Jeju14
13°C sea temperature in March in Jeju13
14°C sea temperature in April in Jeju14
16°C sea temperature in May in Jeju16
20°C sea temperature in June in Jeju20
24°C sea temperature in July in Jeju24
27°C sea temperature in August in Jeju27
25°C sea temperature in September in Jeju25
22°C sea temperature in October in Jeju22
19°C sea temperature in November in Jeju19
17°C sea temperature in December in Jeju17

Sunshine & Daylight in Jeju

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Jeju10
11 hours of daylight per day in February in Jeju11
12 hours of daylight per day in March in Jeju12
13 hours of daylight per day in April in Jeju13
14 hours of daylight per day in May in Jeju14
14 hours of daylight per day in June in Jeju14
14 hours of daylight per day in July in Jeju14
13 hours of daylight per day in August in Jeju13
12 hours of daylight per day in September in Jeju12
11 hours of daylight per day in October in Jeju11
10 hours of daylight per day in November in Jeju10
10 hours of daylight per day in December in Jeju10

Rainfall in Jeju

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
12 days with some rainfall in January in Jeju12
11 days with some rainfall in February in Jeju11
10 days with some rainfall in March in Jeju10
11 days with some rainfall in April in Jeju11
10 days with some rainfall in May in Jeju10
12 days with some rainfall in June in Jeju12
13 days with some rainfall in July in Jeju13
11 days with some rainfall in August in Jeju11
10 days with some rainfall in September in Jeju10
7 days with some rainfall in October in Jeju7
9 days with some rainfall in November in Jeju9
10 days with some rainfall in December in Jeju10
Average monthly rainfall (mm)
62 mm monthly rainfall in January in Jeju62
78 mm monthly rainfall in February in Jeju78
92 mm monthly rainfall in March in Jeju92
134 mm monthly rainfall in April in Jeju134
140 mm monthly rainfall in May in Jeju140
235 mm monthly rainfall in June in Jeju235
267 mm monthly rainfall in July in Jeju267
253 mm monthly rainfall in August in Jeju253
188 mm monthly rainfall in September in Jeju188
83 mm monthly rainfall in October in Jeju83
78 mm monthly rainfall in November in Jeju78
47 mm monthly rainfall in December in Jeju47

More climate for Jeju

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 3 (Moderate) in January in Jeju3
UV (maximum) index 4 (Moderate) in February in Jeju4
UV (maximum) index 6 (High) in March in Jeju6
UV (maximum) index 8 (Very High) in April in Jeju8
UV (maximum) index 9 (Very High) in May in Jeju9
UV (maximum) index 10 (Very High) in June in Jeju10
UV (maximum) index 11 (Extreme) in July in Jeju11
UV (maximum) index 10 (Very High) in August in Jeju10
UV (maximum) index 8 (Very High) in September in Jeju8
UV (maximum) index 6 (High) in October in Jeju6
UV (maximum) index 4 (Moderate) in November in Jeju4
UV (maximum) index 3 (Moderate) in December in Jeju3
Heat & Humidity
No heat & humidity in January in Jeju0
No heat & humidity in February in Jeju0
No heat & humidity in March in Jeju0
No heat & humidity in April in Jeju0
No heat & humidity in May in Jeju0
No heat & humidity in June in Jeju0
High heat & humidity in July in JejuH
High heat & humidity in August in JejuH
Low heat & humidity in September in JejuL
No heat & humidity in October in Jeju0
No heat & humidity in November in Jeju0
No heat & humidity in December in Jeju0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

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The climate guide for Jeju, South Korea shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Metric (°C / mm)  |  Imperial (°F / inches)

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Below are average maximum temperatures at popular destinations in South Korea for next month - January. Select a destination to see the climate guide for all months of the year.

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