Jeju weather by month

Check out Jeju weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Jeju (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
46°F maximum daytime temperature in January in Jeju46
48°F maximum daytime temperature in February in Jeju48
54°F maximum daytime temperature in March in Jeju54
63°F maximum daytime temperature in April in Jeju63
70°F maximum daytime temperature in May in Jeju70
75°F maximum daytime temperature in June in Jeju75
82°F maximum daytime temperature in July in Jeju82
84°F maximum daytime temperature in August in Jeju84
79°F maximum daytime temperature in September in Jeju79
70°F maximum daytime temperature in October in Jeju70
61°F maximum daytime temperature in November in Jeju61
52°F maximum daytime temperature in December in Jeju52
Min temperature (night-time)
34°F minimum night-time temperature in January in Jeju34
36°F minimum night-time temperature in February in Jeju36
39°F minimum night-time temperature in March in Jeju39
48°F minimum night-time temperature in April in Jeju48
55°F minimum night-time temperature in May in Jeju55
63°F minimum night-time temperature in June in Jeju63
72°F minimum night-time temperature in July in Jeju72
73°F minimum night-time temperature in August in Jeju73
66°F minimum night-time temperature in September in Jeju66
55°F minimum night-time temperature in October in Jeju55
46°F minimum night-time temperature in November in Jeju46
37°F minimum night-time temperature in December in Jeju37
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
Sea temperature
59°F sea temperature in January in Jeju59
57°F sea temperature in February in Jeju57
55°F sea temperature in March in Jeju55
57°F sea temperature in April in Jeju57
61°F sea temperature in May in Jeju61
68°F sea temperature in June in Jeju68
75°F sea temperature in July in Jeju75
81°F sea temperature in August in Jeju81
77°F sea temperature in September in Jeju77
72°F sea temperature in October in Jeju72
66°F sea temperature in November in Jeju66
63°F sea temperature in December in Jeju63

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

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
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

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 (inches)
2.4 inches monthly rainfall in January in Jeju2.4
3.1 inches monthly rainfall in February in Jeju3.1
3.6 inches monthly rainfall in March in Jeju3.6
5.3 inches monthly rainfall in April in Jeju5.3
5.5 inches monthly rainfall in May in Jeju5.5
9.3 inches monthly rainfall in June in Jeju9.3
10.5 inches monthly rainfall in July in Jeju10.5
10.0 inches monthly rainfall in August in Jeju10.0
7.4 inches monthly rainfall in September in Jeju7.4
3.3 inches monthly rainfall in October in Jeju3.3
3.1 inches monthly rainfall in November in Jeju3.1
1.9 inches monthly rainfall in December in Jeju1.9

More about Jeju

Jeju by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for South Korea (Jeju) 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.

What's the climate like in Jeju?

Jeju has a temperate climate with hot summers and some rainfall in all months.

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: Jeju, South Korea typhoon season

% of month affected by tropical storms
0
0
0
0
0
1.6%
4.4%
6.5%
3.6%
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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Compare Jeju with the USA

Below the Jeju chart shows average maximum daytime temperature for Jeju, South Korea and the USA (Washington).

Maximum daytime temperature (°F)

Jeju, South Korea
USA (Washington)
46
41
48
45
54
55
63
66
70
75
75
84
82
88
84
86
79
79
70
68
61
57
52
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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