Jeju CitySouth Korea · East Asia · September

September climate

BeachIslandCoastal

September in Jeju City

South Korea · East Asia

Warm coastal days and some sun. Typhoon risk near peak is the main drawback.

Some tradeoffs

Daytime high

76°F

Lows around 72°F

Rain

Several rainy days

Sun

8.5 h/day

Air feel

Humid

Sea temp

78°F

Great for swimming

When to visit

Month-by-month fit

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Temperature

Pleasant by day, warm at night.

76°Ftypical September high

Typical range

Precipitation

Several rainy days. About 12 wet days, more than in most months.

40%wet-day frequency

AmountWet-day chance

Sunshine

Cloudier spells limit sunshine.

8.5 hSeptember sunshine

Heat & humidity by month

Humid air and frequent rain shape this month.

63%September Heat feel

Easy airWarm airHumid airVery humid air

Hourly temperature pattern

In September, afternoons feel about 75° and nights feel near 73°.

FreezingVery coldColdCoolComfortableWarmHotNight hours

Clear sky

Partly cloudy skies this month.

41%September Clear sky

Clear skyCloud

Wind pattern

September's typical breeze keeps the air from feeling as stagnant.

11 mphSeptember Breezy

Sea temperature

78°FSeptember sea temp

More detailIncludes daypart comfort

Typical September day

September late afternoons are around 76°F, easing to about 74°F in early evening.

Avg temp Typical range

Morning74°F

Rain28%

Cloud60%

Humid airHigh

Sun intensityLow

Midday76°F

Rain30%

Cloud59%

Humid airHigh

Sun intensityStrong

Late afternoon76°F

Rain26%

Cloud58%

Humid airHigh

Sun intensityModerate

Early evening74°F

Rain21%

Cloud55%

Humid airHigh

Sun intensityMinimal

Best window

Data table

View month-by-month numbers

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	46	40	2.9	11	5.4	68	55
Feb	47	41	2.7	10	6.8	69	53
Mar	52	46	3.5	10	8.1	70	53
Apr	59	53	3.9	9	9.2	75	56
May	66	60	4.2	8	9.4	80	62
Jun	72	67	7.3	12	8.2	87	69
Jul	79	75	7.1	13	9.0	88	76
Aug	82	78	6.2	14	9.8	84	80
Sep	76	72	7.2	12	8.5	80	78
Oct	68	63	3.2	8	8.8	72	72
Nov	59	53	3.1	9	7.1	69	66
Dec	50	44	2.7	11	5.8	68	60

Similar climates

Want a side-by-side climate view? Compare Jeju City with Elba.

Climate data notePlanning guidance, not a forecast

Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.

Sunshine: source type is not yet identified at metric level.

Local microclimates can vary by beach, neighborhood, trail, or elevation.

Last updated: Jun 4, 2026

Data & methodology

Month

High°F

Low°F

Rainin

Wet days

Sunh

Humidity%

Sea°F

Jan

2.9

5.4

Feb

2.7

6.8

Mar

3.5

8.1

Apr

3.9

9.2

May

4.2

9.4

Jun

7.3

8.2

Jul

7.1

9.0

Aug

6.2

9.8

Sep

7.2

8.5

Oct

3.2

8.8

Nov

3.1

7.1

Dec

2.7

5.8

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	46	40	2.9	11	5.4	68	55
Feb	47	41	2.7	10	6.8	69	53
Mar	52	46	3.5	10	8.1	70	53
Apr	59	53	3.9	9	9.2	75	56
May	66	60	4.2	8	9.4	80	62
Jun	72	67	7.3	12	8.2	87	69
Jul	79	75	7.1	13	9.0	88	76
Aug	82	78	6.2	14	9.8	84	80
Sep	76	72	7.2	12	8.5	80	78
Oct	68	63	3.2	8	8.8	72	72
Nov	59	53	3.1	9	7.1	69	66
Dec	50	44	2.7	11	5.8	68	60

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	46	40	2.9	11	5.4	68	55
Feb	47	41	2.7	10	6.8	69	53
Mar	52	46	3.5	10	8.1	70	53
Apr	59	53	3.9	9	9.2	75	56
May	66	60	4.2	8	9.4	80	62
Jun	72	67	7.3	12	8.2	87	69
Jul	79	75	7.1	13	9.0	88	76
Aug	82	78	6.2	14	9.8	84	80
Sep	76	72	7.2	12	8.5	80	78
Oct	68	63	3.2	8	8.8	72	72
Nov	59	53	3.1	9	7.1	69	66
Dec	50	44	2.7	11	5.8	68	60

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	46	40	2.9	11	5.4	68	55
Feb	47	41	2.7	10	6.8	69	53
Mar	52	46	3.5	10	8.1	70	53
Apr	59	53	3.9	9	9.2	75	56
May	66	60	4.2	8	9.4	80	62
Jun	72	67	7.3	12	8.2	87	69
Jul	79	75	7.1	13	9.0	88	76
Aug	82	78	6.2	14	9.8	84	80
Sep	76	72	7.2	12	8.5	80	78
Oct	68	63	3.2	8	8.8	72	72
Nov	59	53	3.1	9	7.1	69	66
Dec	50	44	2.7	11	5.8	68	60

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	46	40	2.9	11	5.4	68	55
Feb	47	41	2.7	10	6.8	69	53
Mar	52	46	3.5	10	8.1	70	53
Apr	59	53	3.9	9	9.2	75	56
May	66	60	4.2	8	9.4	80	62
Jun	72	67	7.3	12	8.2	87	69
Jul	79	75	7.1	13	9.0	88	76
Aug	82	78	6.2	14	9.8	84	80
Sep	76	72	7.2	12	8.5	80	78
Oct	68	63	3.2	8	8.8	72	72
Nov	59	53	3.1	9	7.1	69	66
Dec	50	44	2.7	11	5.8	68	60

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	46	40	2.9	11	5.4	68	55
Feb	47	41	2.7	10	6.8	69	53
Mar	52	46	3.5	10	8.1	70	53
Apr	59	53	3.9	9	9.2	75	56
May	66	60	4.2	8	9.4	80	62
Jun	72	67	7.3	12	8.2	87	69
Jul	79	75	7.1	13	9.0	88	76
Aug	82	78	6.2	14	9.8	84	80
Sep	76	72	7.2	12	8.5	80	78
Oct	68	63	3.2	8	8.8	72	72
Nov	59	53	3.1	9	7.1	69	66
Dec	50	44	2.7	11	5.8	68	60

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	46	40	2.9	11	5.4	68	55
Feb	47	41	2.7	10	6.8	69	53
Mar	52	46	3.5	10	8.1	70	53
Apr	59	53	3.9	9	9.2	75	56
May	66	60	4.2	8	9.4	80	62
Jun	72	67	7.3	12	8.2	87	69
Jul	79	75	7.1	13	9.0	88	76
Aug	82	78	6.2	14	9.8	84	80
Sep	76	72	7.2	12	8.5	80	78
Oct	68	63	3.2	8	8.8	72	72
Nov	59	53	3.1	9	7.1	69	66
Dec	50	44	2.7	11	5.8	68	60