Climate in Seoul — Annual Weather Overview
Seoul has a continental climate — hot summers, cold winters and moderate rainfall. The hottest month is July (average high 28.7°C) and the coolest is January (2.4°C). The seasons are strongly defined — a 26.3°C swing between July highs and January lows. Annual rainfall totals around 1533mm. August is the wettest month at 401.9mm, while February averages just 19.5mm. Average daily sunshine is 8.4 hours.
**Spring (March, April, May):** average highs 17.3°C, 244mm rain. **Summer (June, July, August):** average highs 27.8°C, 870mm rain. **Autumn (September, October, November):** average highs 18.2°C, 343mm rain. **Winter (December, January, February):** average highs 3.5°C, 77mm rain.
Seoul — Monthly Temperatures
Seoul — Monthly Rainfall
✅ Best months to visit
All year
ℹ️ No months to avoid
Weather in Seoul stays reasonable all year.
Seoul weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | 2.4°C | -6.7°C | 30.6mm | 7.5h | 4 | 8/10 |
| February | 5.3°C | -4.7°C | 19.5mm | 8.6h | 4 | 10/10 |
| March | 12.4°C | 0.7°C | 52.9mm | 8.8h | 6 | 10/10 |
| April | 17.3°C | 6.1°C | 62.1mm | 9.4h | 6 | 10/10 |
| May | 22.2°C | 11.6°C | 128.7mm | 9.4h | 10 | 9/10 |
| June | 26.3°C | 17.8°C | 193.2mm | 8.8h | 13 | 9/10 |
| July | 28.7°C | 21.8°C | 274.8mm | 8.4h | 18 | 8/10 |
| August | 28.4°C | 22.1°C | 401.9mm | 7.9h | 20 | 8/10 |
| September | 25.0°C | 17.1°C | 195.8mm | 8.4h | 10 | 9/10 |
| October | 18.2°C | 8.8°C | 74.9mm | 8.4h | 7 | 10/10 |
| November | 11.5°C | 1.8°C | 72.3mm | 7.4h | 7 | 10/10 |
| December | 2.7°C | -6.0°C | 26.6mm | 7.2h | 4 | 8/10 |
For the full verdict on when to go, see the best time to visit Seoul and the Seoul rainy season guide. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does Seoul have?
Seoul has a continental climate — hot summers, cold winters and moderate rainfall. Average highs range from 2.4°C in January to 28.7°C in July.
What is the hottest month in Seoul?
July is the hottest month in Seoul, with average highs of 28.7°C and lows of 21.8°C.
What is the coldest month in Seoul?
January is the coolest month, with average highs of 2.4°C and lows of -6.7°C.
What is the wettest month in Seoul?
August is the wettest month, averaging 401.9mm of rainfall over around 20 rainy days.
When is rainy season in Seoul?
Rainy season in Seoul runs May to September, when rainfall is significantly higher than the rest of the year. Full rainy season guide →
How much rain does Seoul get per year?
Seoul receives around 1533mm of rain per year. The driest month is February (19.5mm).
When is the best time to visit Seoul?
The best time to visit Seoul is All year. See the full month-by-month guide →
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Trip essentials for Seoul
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.