Jeju City vs Gunsan: which is sunnier?
🇰🇷 South Korea vs 🇰🇷 South Korea · 266 km apart · long-term climate normals (NASA POWER, 2001–2020)
Gunsan is the sunnier overall: about 1,884 hours of sunshine a year to Jeju City's 1,734. Month by month it's balanced: each has the higher Sunshine Score in 5 months, with 2 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 | Gunsan | |
|---|---|---|
| Sunshine hours / year | 1,734 | 1,884 |
| Sunniest month | October (72/100) | October (79/100) |
| Nov–Feb average score | 23/100 | 9/100 |
| Jun–Aug average score | 61/100 | 63/100 |
| Rain / year | 1,579 mm | 1,267 mm |
| Warmest sea | 31°C / 88°F | 32°C / 90°F |
| Peak midday UV | 7 (high) | 7 (high) |
Jeju City vs Gunsan month by month
| Month | Sunshine Score | Day high °C | Rain mm | Sea °C | ||||
|---|---|---|---|---|---|---|---|---|
| Jeju City | Gunsan | Jeju City | Gunsan | Jeju City | Gunsan | Jeju City | Gunsan | |
| January | 7 | 0 | 9° | 3° | 50 | 27 | 16° | 5° |
| February | 13 | 0 | 10° | 6° | 66 | 39 | 15° | 6° |
| March | 24 | 20 | 12° | 11° | 90 | 50 | 15° | 7° |
| April | 37 | 56 | 15° | 17° | 137 | 85 | 16° | 14° |
| May | 52 | 74 | 18° | 23° | 141 | 85 | 18° | 19° |
| June | 61 | 65 | 22° | 27° | 192 | 136 | 22° | 24° |
| July | 61 | 62 | 26° | 29° | 240 | 317 | 26° | 27° |
| August | 61 | 62 | 28° | 30° | 261 | 261 | 31° | 32° |
| September | 61 | 65 | 25° | 25° | 185 | 134 | 30° | 29° |
| October | 72 | 79 | 21° | 20° | 89 | 56 | 26° | 22° |
| November | 50 | 34 | 16° | 13° | 72 | 45 | 21° | 17° |
| December | 20 | 0 | 11° | 5° | 56 | 32 | 18° | 10° |
The sunnier month by month: Jan Jeju City · Feb Jeju City · Mar Jeju City · Apr Gunsan · May Gunsan · Jun Gunsan · Jul even · Aug even · Sep Gunsan · Oct Gunsan · Nov Jeju City · Dec Jeju City.
When to pick which
- November–February: Jeju City (average score 23/100 vs 9). Jeju City is the warmer, around 12°C daytime highs vs 7°C. See the winter sun ranking.
- March–May: Gunsan (average score 50/100 vs 38). Gunsan is the warmer, around 17°C daytime highs vs 15°C.
- June–August: too close to call — Jeju City averages 61/100, Gunsan 63/100. Gunsan is the warmer, around 29°C daytime highs vs 25°C.
- September–October: Gunsan (average score 72/100 vs 67). Daytime highs are similar (23°C vs 23°C).
Sea temperature
Gunsan's sea gets warmer: 32°C / 90°F at its peak vs 31°C. Swimmable water (21°C+): Jeju City about 6 months a year, Gunsan about 5 months a year. Month-by-month sea temperatures are in the table above.
Full month-by-month guides: Jeju City weather by month · Gunsan weather by month · Best time to visit South Korea.
More comparisons: Jeju City vs Gwangju · Jeju City vs Yeosu · Gunsan vs Seoul · Gunsan vs Cheongju · Gunsan vs Gwangju · all head-to-heads