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📊 Monthly Climate Overview
| Month | Max °C | Min °C | Rain mm | Rain Days | Sun h | Wind km/h | Sea °C |
|---|---|---|---|---|---|---|---|
| Jan | 2.1°C | -6.6°C | 17.1 mm | 3 | 7.8 h | 15.9 km/h | 3.1°C |
| Feb | 4.8°C | -4.9°C | 21.7 mm | 4 | 8.6 h | 17.3 km/h | 3.1°C |
| Mar | 11.6°C | 0.1°C | 37 mm | 5 | 9.2 h | 17.6 km/h | 6.4°C |
| Apr | 17.5°C | 6.3°C | 64.3 mm | 7 | 9.5 h | 19 km/h | 11.3°C |
| May | 22.8°C | 11.7°C | 99.2 mm | 8 | 10.2 h | 18.4 km/h | 16.7°C |
| Jun | 26.7°C | 17.5°C | 114.8 mm | 10 | 9.8 h | 16.4 km/h | 22.5°C |
| Jul | 28.9°C | 21.8°C | 269.8 mm | 17 | 8.5 h | 15.1 km/h | 26.9°C |
| Aug | 28.8°C | 22.1°C | 266.9 mm | 16 | 8.8 h | 14.6 km/h | 28.4°C |
| Sep | 25°C | 16.7°C | 118.5 mm | 8 | 8.6 h | 13.8 km/h | 25.8°C |
| Oct | 18.5°C | 9°C | 75.5 mm | 6 | 8.5 h | 14.3 km/h | 20.9°C |
| Nov | 11.1°C | 1.9°C | 57.8 mm | 7 | 7.2 h | 15 km/h | 14.9°C |
| Dec | 3°C | -5.5°C | 27.7 mm | 5 | 7.2 h | 15.6 km/h | 7.4°C |
📖Climate & Best Time to Visit Seoul
Seoul (South Korea) has a Mediterranean / mild temperate climate with an annual average of around 12 °C. Daytime highs average 17 °C, while nights cool to about 8 °C. The destination sees roughly 1170 mm of rainfall per year and 8.7 hours of sunshine per day on average.
Spring and autumn are ideal for a city break: May is the sunniest month with 10.2 hours of sun per day, and mild temperatures make exploring on foot comfortable. Peak summer (July, up to 28.9 °C) can get exhausting, while in January nights drop to -6.6 °C.
Note: with roughly 36 °C between the hottest and coldest month, picking the right time of year matters a lot here.
🎟️ Top activities in Seoul
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Frequently asked questions about Seoul
When is the best time to visit Seoul?
The best time to visit Seoul: April, May and October – best in October (avg. 13.8 °C, 6 rainy days). Based on the monthly values for 2014 to 2023.
What are the temperatures in Seoul?
The warmest month is July with an average of 25.4 °C and daytime highs around 28.9 °C. The coldest month is January with an average of -2.2 °C and night-time lows around -6.6 °C.
How many rainy days does Seoul have?
July has the most rainy days with 17 rainy days. The driest month is January with 3 rainy days.
What is the sea temperature near Seoul?
The water is warmest in August at an average of 28.4 °C and coolest in January at 3.1 °C.