Jeju weather by month

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

Temperature
Rainfall
Sunshine & UV index

Temperature in Jeju (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	8	9	12	17	21	24	28	29	26	21	16	11
Min temperature (night-time)	1	2	4	9	13	17	22	23	19	13	8	3
Heat & Humidity	0	0	0	0	0	0	H	H	L	0	0	0
Sea temperature	15	14	13	14	16	20	24	27	25	22	19	17

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

Sunshine & UV index in Jeju

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	4	5	6	7	7	6	6	7	6	6	5	4
Daily hours of daylight	10	11	12	13	14	14	14	13	12	11	10	10
UV Index (Maximum)	3	4	6	8	9	10	11	10	8	6	4	3

Rainfall in Jeju

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	12	11	10	11	10	12	13	11	10	7	9	10
Average monthly rainfall (mm)	62	78	92	134	140	235	267	253	188	83	78	47

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.

Jeju weather in January

Expect daytime maximum temperatures of 8°C in Jeju, South Korea in January based on long-term weather averages. There are 4 hours of sunshine per day on average with 12 days with some rainfall and typically 62 mm of rainfall in the month.

8
8°C max day temperature
4
4 hours of sunshine per day
12
12 days with some rainfall
1
1°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
62
62 mm of monthly rainfall
3
3 (Moderate) UV index
15
15°C sea temperature

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Jeju weather in February

Expect daytime maximum temperatures of 9°C in Jeju, South Korea in February based on long-term weather averages. There are 5 hours of sunshine per day on average with 11 days with some rainfall and typically 78 mm of rainfall in the month.

9
9°C max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
2
2°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
78
78 mm of monthly rainfall
4
4 (Moderate) UV index
14
14°C sea temperature

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Jeju weather in March

Expect daytime maximum temperatures of 12°C in Jeju, South Korea in March based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 92 mm of rainfall in the month.

12
12°C max day temperature
6
6 hours of sunshine per day
10
10 days with some rainfall
4
4°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
92
92 mm of monthly rainfall
6
6 (High) UV index
13
13°C sea temperature

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Jeju weather in April

Expect daytime maximum temperatures of 17°C in Jeju, South Korea in April based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 134 mm of rainfall in the month.

17
17°C max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
9
9°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
134
134 mm of monthly rainfall
8
8 (Very High) UV index
14
14°C sea temperature

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Jeju weather in May

Expect daytime maximum temperatures of 21°C in Jeju, South Korea in May based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 140 mm of rainfall in the month.

21
21°C max day temperature
7
7 hours of sunshine per day
10
10 days with some rainfall
13
13°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
140
140 mm of monthly rainfall
9
9 (Very High) UV index
16
16°C sea temperature

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Jeju weather in June

Expect daytime maximum temperatures of 24°C in Jeju, South Korea in June based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 235 mm of rainfall in the month.

24
24°C max day temperature
6
6 hours of sunshine per day
12
12 days with some rainfall
17
17°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
235
235 mm of monthly rainfall
10
10 (Very High) UV index
20
20°C sea temperature

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Jeju weather in July

Expect daytime maximum temperatures of 28°C in Jeju, South Korea in July and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 13 days with some rainfall and typically 267 mm of rainfall in the month.

28
28°C max day temperature
6
6 hours of sunshine per day
13
13 days with some rainfall
22
22°C min night temperature
14
14 hours of daylight per day
H
High heat & humidity
267
267 mm of monthly rainfall
11
11 (Extreme) UV index
24
24°C sea temperature

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Jeju weather in August

Expect daytime maximum temperatures of 29°C in Jeju, South Korea in August and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 253 mm of rainfall in the month.

29
29°C max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
23
23°C min night temperature
13
13 hours of daylight per day
H
High heat & humidity
253
253 mm of monthly rainfall
10
10 (Very High) UV index
27
27°C sea temperature

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Jeju weather in September

Expect daytime maximum temperatures of 26°C in Jeju, South Korea in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 188 mm of rainfall in the month.

26
26°C max day temperature
6
6 hours of sunshine per day
10
10 days with some rainfall
19
19°C min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
188
188 mm of monthly rainfall
8
8 (Very High) UV index
25
25°C sea temperature

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Jeju weather in October

Expect daytime maximum temperatures of 21°C in Jeju, South Korea in October based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 83 mm of rainfall in the month.

21
21°C max day temperature
6
6 hours of sunshine per day
7
7 days with some rainfall
13
13°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
83
83 mm of monthly rainfall
6
6 (High) UV index
22
22°C sea temperature

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Jeju weather in November

Expect daytime maximum temperatures of 16°C in Jeju, South Korea in November based on long-term weather averages. There are 5 hours of sunshine per day on average with typically 78 mm of rainfall in the month.

16
16°C max day temperature
5
5 hours of sunshine per day
9
9 days with some rainfall
8
8°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
78
78 mm of monthly rainfall
4
4 (Moderate) UV index
19
19°C sea temperature

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Jeju weather in December

Expect daytime maximum temperatures of 11°C in Jeju, South Korea in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 10 days with some rainfall and typically 47 mm of rainfall in the month.

11
11°C max day temperature
4
4 hours of sunshine per day
10
10 days with some rainfall
3
3°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
47
47 mm of monthly rainfall
3
3 (Moderate) UV index
17
17°C sea temperature

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