Seoul vs Yangyang: which is sunnier?
🇰🇷 South Korea vs 🇰🇷 South Korea · 206 km apart · long-term climate normals (NASA POWER, 2001–2020)
Seoul is the sunnier overall: about 2,037 hours of sunshine a year to Yangyang's 1,941. Yangyang has the higher Sunshine Score in 4 of 12 months, Seoul 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
| Seoul | Yangyang | |
|---|---|---|
| Sunshine hours / year | 2,037 | 1,941 |
| Sunniest month | June (72/100) | May (75/100) |
| Nov–Feb average score | 5/100 | 7/100 |
| Jun–Aug average score | 66/100 | 64/100 |
| Rain / year | 1,174 mm | 1,426 mm |
| Warmest sea | 30°C / 86°F | 28°C / 82°F |
| Peak midday UV | 6 (high) | 6 (high) |
Seoul vs Yangyang month by month
| Month | Sunshine Score | Day high °C | Rain mm | Sea °C | ||||
|---|---|---|---|---|---|---|---|---|
| Seoul | Yangyang | Seoul | Yangyang | Seoul | Yangyang | Seoul | Yangyang | |
| January | 0 | 0 | 1° | 3° | 22 | 31 | 2° | 7° |
| February | 0 | 0 | 3° | 5° | 32 | 44 | 2° | 4° |
| March | 0 | 7 | 6° | 9° | 36 | 49 | 5° | 8° |
| April | 26 | 44 | 12° | 15° | 69 | 84 | 12° | 14° |
| May | 56 | 75 | 17° | 20° | 86 | 80 | 17° | 17° |
| June | 72 | 68 | 21° | 24° | 103 | 119 | 23° | 21° |
| July | 63 | 62 | 25° | 26° | 323 | 345 | 26° | 24° |
| August | 63 | 62 | 26° | 27° | 246 | 284 | 30° | 28° |
| September | 67 | 62 | 24° | 23° | 129 | 196 | 28° | 25° |
| October | 68 | 61 | 18° | 18° | 51 | 91 | 20° | 21° |
| November | 20 | 26 | 11° | 12° | 51 | 70 | 15° | 17° |
| December | 0 | 0 | 4° | 5° | 26 | 33 | 6° | 12° |
The sunnier month by month: Jan even · Feb even · Mar Yangyang · Apr Yangyang · May Yangyang · Jun Seoul · Jul even · Aug even · Sep Seoul · Oct Seoul · Nov Yangyang · Dec even.
When to pick which
- November–February: too close to call — Seoul averages 5/100, Yangyang 7/100. Daytime highs are similar (5°C vs 6°C). See the winter sun ranking.
- March–May: Yangyang (average score 42/100 vs 27). Yangyang is the warmer, around 15°C daytime highs vs 12°C.
- June–August: too close to call — Seoul averages 66/100, Yangyang 64/100. Yangyang is the warmer, around 26°C daytime highs vs 24°C.
- September–October: Seoul (average score 68/100 vs 62). Daytime highs are similar (21°C vs 21°C).
Sea temperature
Seoul's sea gets warmer: 30°C / 86°F at its peak vs 28°C. Swimmable water (21°C+): Seoul about 4 months a year, Yangyang about 5 months a year. Month-by-month sea temperatures are in the table above.
Full month-by-month guides: Seoul weather by month · Yangyang weather by month · Best time to visit South Korea.
More comparisons: Seoul vs Cheongju · Seoul vs Gunsan · Yangyang vs Cheongju · Yangyang vs Daegu · all head-to-heads