Korea month by month — weather, what to wear, public holidays and festivals. By the numbers, the months with a mild Seoul high (17–27°C) and the fewest rainy days are October, April, May; the wettest is July (about 403 mm in Seoul).
| Month | Seoul high / low | Seoul rain days | Seoul snow days | Jeju high / low | What to wear |
|---|---|---|---|---|---|
| January | 2° / -6° | 2.9 | 2.0 | 9° / 4° | Cold |
| February | 5° / -3° | 3.5 | 1.5 | 10° / 4° | Cold |
| March | 13° / 2° | 4.3 | 0.4 | 14° / 7° | Cool |
| April | 19° / 8° | 6.7 | 0.0 | 19° / 12° | Mild |
| May | 24° / 14° | 7.0 | 0.0 | 23° / 16° | Mild |
| June | 28° / 19° | 7.7 | 0.0 | 26° / 20° | Warm |
| July | 30° / 23° | 13.1 | 0.0 | 30° / 25° | Hot |
| August | 31° / 24° | 11.5 | 0.0 | 31° / 26° | Hot |
| September | 27° / 19° | 6.5 | 0.0 | 27° / 22° | Warm |
| October | 21° / 11° | 4.9 | 0.0 | 22° / 17° | Mild |
| November | 13° / 4° | 6.6 | 0.3 | 17° / 11° | Cool |
| December | 4° / -4° | 4.5 | 2.3 | 11° / 6° | Cold |
Rain days count days with at least 1 mm; snow days count days with at least 1 cm of fresh snow. Pick a month for its festivals and public holidays.
FAQ
What is the best month to visit Korea?
It depends on what you want, but by the numbers October and April and May combine mild days (17–27°C highs in Seoul) with the fewest rainy days. July and August are hot and the wettest; December to February are cold.
When is the rainy season in Korea?
The wettest months in Seoul are July and August — July averages about 403 mm.
Weather: Korea Meteorological Administration station records, 2011–2025 averages (not the official 1991–2020 normals). Holidays: Korea Astronomy and Space Science Institute. Festivals: Korea Tourism Organization (TourAPI). Page rebuilt 2026-10-01.
