Seoul Climate by Month
Seoul, South Korea
Warm summers and cold winters, with most rain from June to September.
The climate in Seoul is one of warm summers and cold winters, with most rain from June to September. August is the warmest month, with highs around 86°F (30°C); January is the coolest at 36°F (2°C), and nights dip to 20°F (-6°C). It gets 49 in (1251 mm) of rain a year, 71% of it from June to September.
- Warmest month
- 86°F(30°C)
- Average high, August
- Coldest nights
- 20°F(-6°C)
- Average low, January
- Rain per year
- 49 in(1251 mm)
- Wettest: July
- Humidity
- 65%
- Sunniest: May
Best and worst months in Seoul
Best for weatherMay is the best time for weather in Seoul: highs near 74°F (23°C) and about 3.5 in (90 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 36°F (2°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Seoul weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 36°F(2°C) | 20°F(-6°C) | 0.7 in(17 mm) | 58% | 2.1 |
| FebFebruary | 41°F(5°C) | 24°F(-4°C) | 0.9 in(23 mm) | 64% | 3.0 |
| MarMarch | 51°F(11°C) | 33°F(1°C) | 1.6 in(40 mm) | 55% | 3.9 |
| AprApril | 64°F(18°C) | 44°F(7°C) | 2.7 in(69 mm) | 56% | 4.8 |
| MayMayBest | 74°F(23°C) | 55°F(13°C) | 3.5 in(90 mm) | 63% | 5.3 |
| JunJune | 81°F(27°C) | 64°F(18°C) | 4.8 in(122 mm) | 69% | 5.1 |
| JulJuly | 84°F(29°C) | 71°F(22°C) | 14 in(345 mm) | 78% | 4.0 |
| AugAugust | 86°F(30°C) | 72°F(22°C) | 12 in(299 mm) | 74% | 4.1 |
| SepSeptember | 79°F(26°C) | 62°F(17°C) | 5.0 in(127 mm) | 71% | 4.0 |
| OctOctober | 68°F(20°C) | 49°F(9°C) | 2.0 in(50 mm) | 66% | 3.5 |
| NovNovember | 53°F(12°C) | 36°F(2°C) | 1.9 in(47 mm) | 60% | 2.4 |
| DecDecember | 39°F(4°C) | 24°F(-5°C) | 0.9 in(22 mm) | 67% | 1.9 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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