🇹🇭 Koh Samui vs Seoul 🇰🇷
Koh Samui, Thailand vs Seoul, South Korea — a side-by-side climate comparison to help you pick. Koh Samui is the warmer of the two — about 12 degrees warmer on average across the year. Seoul is drier, with roughly 194 fewer rainy days a year.
Climate at a glance
| 🇹🇭 Koh Samui | 🇰🇷 Seoul | |
|---|---|---|
| Avg annual high | 29°C | 17°C |
| Hottest month | April (31°C) | August (30°C) |
| Coldest month | January (25°C low) | January (-6°C low) |
| Rainy days / year | 306 | 112 |
| Snow | Rare | Yes |
| Best months to visit | February, March, December | May, September, October |
🇹🇭 Koh Samui
Best around February, March, December. Hottest in April (31°C), coldest lows in January (25°C).
🇰🇷 Seoul
Best around May, September, October. Hottest in August (30°C), coldest lows in January (-6°C).
Frequently asked questions
Is Koh Samui or Seoul warmer?
Koh Samui is warmer overall, averaging about 12 degrees higher across the year.
Which is rainier, Koh Samui or Seoul?
Koh Samui is rainier — Seoul sees about 194 fewer rainy days per year.
When is the best time to visit Koh Samui vs Seoul?
Koh Samui is best around February, March, December; Seoul is best around May, September, October.