Jeju City weather by month & the best time to visit
🇰🇷 South Korea · coastal city break · humid subtropical climate
The best time to visit Jeju City is October — its sunniest month (Sunshine Score 72/100). Jeju City averages about 1,734 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 89 mm of rain in October.
Jump to: month-by-month table · sea temperature · nearby alternatives · embed this data
- Sun hours / year
- 1,734
- Sunniest month
- October
- Peak score
- 72/100
- Rain / year
- 1,579 mm
- Midday UV at peak
- 7 (high)
- Sea at warmest
- 31°C / 88°F
- Population
- 489k
- Elevation
- 23 m
When is the best time to visit Jeju City?
For sunshine, the best time to visit Jeju City is October. The dullest month is January (7/100, 50 mm of rain). The full month-by-month picture is in the table below.
How sunny is Jeju City?
Jeju City isn't a sunny place by world standards: about 1,734 hours of sunshine a year. 65 Sunshine Score points separate October (72) from January (7), so the month you pick matters. It ranks #14 of 14 destinations in South Korea for annual sunshine, below the national median of 1,959 hours. Rain has a clear season: the wettest stretch, around July, carries about 44% of the annual 1,579 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 7 | 9° / 48°F | 6° / 43°F | 50 mm | 2 | 16° / 61°F |
| February | 13 | 10° / 50°F | 7° / 45°F | 66 mm | 3 | 15° / 59°F |
| March | 24 | 12° / 54°F | 9° / 48°F | 90 mm | 4 | 15° / 59°F |
| April | 37 | 15° / 59°F | 12° / 54°F | 137 mm | 5 | 16° / 61°F |
| May | 52 | 18° / 64°F | 15° / 59°F | 141 mm | 6 | 18° / 64°F |
| June | 61 | 22° / 72°F | 20° / 68°F | 192 mm | 6 | 22° / 72°F |
| July | 61 | 26° / 79°F | 24° / 75°F | 240 mm | 7 | 26° / 79°F |
| August | 61 | 28° / 82°F | 26° / 79°F | 261 mm | 7 | 31° / 88°F |
| September | 61 | 25° / 77°F | 23° / 73°F | 185 mm | 6 | 30° / 86°F |
| October | 72 | 21° / 70°F | 18° / 64°F | 89 mm | 5 | 26° / 79°F |
| November | 50 | 16° / 61°F | 13° / 55°F | 72 mm | 3 | 21° / 70°F |
| December | 20 | 11° / 52°F | 8° / 46°F | 56 mm | 2 | 18° / 64°F |
Sea temperature in Jeju City by month
The sea off Jeju City is warmest in August at around 31°C / 88°F, and coolest in February at 15°C / 59°F. The water sits at a comfortable 21°C or warmer roughly 6 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Jeju City on the interactive sunshine globe →
Nearby places for sunshine
- Yeosu South Korea · 180 km · best in Oct · 2,024 h sun/yr
- Gwangju South Korea · 181 km · best in Oct · 1,884 h sun/yr
- Gunsan South Korea · 266 km · best in Oct · 1,884 h sun/yr
- Busan South Korea · 291 km · best in Oct · 2,112 h sun/yr
- Nagasaki Japan · 325 km · best in Oct · 1,779 h sun/yr
- Daegu South Korea · 331 km · best in Oct · 2,111 h sun/yr
Nearest destinations
- Muan (Piseo-ri) South Korea · 165 km · 1,890 h sun/yr · best in Oct
- Sacheon South Korea · 228 km · 2,112 h sun/yr · best in Oct
- Goto Japan · 237 km · 1,677 h sun/yr · best in Oct
Head-to-head
How Jeju City compares month by month: Jeju City vs Gwangju · Jeju City vs Yeosu · Jeju City vs Gunsan · all comparisons
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