Jeju City vs Yeosu: which is sunnier?
🇰🇷 South Korea vs 🇰🇷 South Korea · 180 km apart · long-term climate normals (NASA POWER, 2001–2020)
Yeosu is the sunnier overall: about 2,024 hours of sunshine a year to Jeju City's 1,734. Jeju City has the higher Sunshine Score in 4 of 12 months, Yeosu in 3 (5 within 2 points).
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Jeju City | Yeosu | |
|---|---|---|
| Sunshine hours / year | 1,734 | 2,024 |
| Sunniest month | October (72/100) | October (78/100) |
| Nov–Feb average score | 23/100 | 10/100 |
| Jun–Aug average score | 61/100 | 63/100 |
| Rain / year | 1,579 mm | 1,407 mm |
| Warmest sea | 31°C / 88°F | 31°C / 88°F |
| Peak midday UV | 7 (high) | 7 (high) |
Jeju City vs Yeosu month by month
| Month | Sunshine Score | Day high °C | Rain mm | Sea °C | ||||
|---|---|---|---|---|---|---|---|---|
| Jeju City | Yeosu | Jeju City | Yeosu | Jeju City | Yeosu | Jeju City | Yeosu | |
| January | 7 | 0 | 9° | 4° | 50 | 29 | 16° | 5° |
| February | 13 | 0 | 10° | 7° | 66 | 48 | 15° | 7° |
| March | 24 | 26 | 12° | 12° | 90 | 69 | 15° | 10° |
| April | 37 | 58 | 15° | 18° | 137 | 114 | 16° | 16° |
| May | 52 | 69 | 18° | 24° | 141 | 119 | 18° | 21° |
| June | 61 | 63 | 22° | 27° | 192 | 164 | 22° | 25° |
| July | 61 | 63 | 26° | 29° | 240 | 295 | 26° | 28° |
| August | 61 | 63 | 28° | 30° | 261 | 264 | 31° | 31° |
| September | 61 | 63 | 25° | 26° | 185 | 157 | 30° | 30° |
| October | 72 | 78 | 21° | 21° | 89 | 67 | 26° | 22° |
| November | 50 | 41 | 16° | 14° | 72 | 47 | 21° | 16° |
| December | 20 | 0 | 11° | 7° | 56 | 34 | 18° | 9° |
The sunnier month by month: Jan Jeju City · Feb Jeju City · Mar even · Apr Yeosu · May Yeosu · Jun even · Jul even · Aug even · Sep even · Oct Yeosu · Nov Jeju City · Dec Jeju City.
When to pick which
- November–February: Jeju City (average score 23/100 vs 10). Jeju City is the warmer, around 12°C daytime highs vs 8°C. See the winter sun ranking.
- March–May: Yeosu (average score 51/100 vs 38). Yeosu is the warmer, around 18°C daytime highs vs 15°C.
- June–August: too close to call — Jeju City averages 61/100, Yeosu 63/100. Yeosu is the warmer, around 29°C daytime highs vs 25°C.
- September–October: Yeosu (average score 71/100 vs 67). Daytime highs are similar (23°C vs 24°C).
Sea temperature
Both seas peak at 31°C / 88°F. Swimmable water (21°C+): Jeju City about 6 months a year, Yeosu about 6 months a year. Month-by-month sea temperatures are in the table above.
Full month-by-month guides: Jeju City weather by month · Yeosu weather by month · Best time to visit South Korea.
More comparisons: Jeju City vs Gwangju · Jeju City vs Gunsan · Yeosu vs Busan · Yeosu vs Gwangju · Yeosu vs Ulsan · all head-to-heads