Capital city, South Korea
Seoul weather by month and the best time to visit
When to go to Seoul
Apr–May and Sep–Nov are mild and clear; cherry blossom and autumn leaves draw crowds. Jul–Aug is humid with monsoon rain; Dec–Feb is dry and very cold.
Seoul weather by month
Average daily high, rainfall and conditions.
- Jan1°20 mm
- Feb3°31 mm
- Mar9°37 mm
- Apr15°72 mm
- May21°84 mm
- Jun26°116 mm
- Jul28°361 mm
- Aug28°260 mm
- Sep24°138 mm
- Oct19°53 mm
- Nov11°47 mm
- Dec3°22 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 1°C33°F | -7°C20°F | 20 mm | 77% | Freezing |
| February | 3°C38°F | -5°C23°F | 31 mm | 74% | Cold |
| March | 9°C48°F | -1°C30°F | 37 mm | 74% | Cold |
| April | 15°C60°F | 5°C40°F | 72 mm | 74% | Cool |
| May | 21°C70°F | 11°C51°F | 84 mm | 75% | Pleasant |
| June | 26°C78°F | 16°C62°F | 116 mm | 76% | Pleasant |
| July | 28°C82°F | 21°C70°F | 361 mm | 84% | Very wet |
| August | 28°C83°F | 22°C71°F | 260 mm | 83% | Rainy |
| September | 24°C76°F | 17°C62°F | 138 mm | 79% | Pleasant |
| October | 19°C65°F | 10°C49°F | 53 mm | 75% | Pleasant |
| November | 11°C51°F | 3°C37°F | 47 mm | 75% | Cold |
| December | 3°C37°F | -4°C24°F | 22 mm | 76% | Freezing |
Best months across South Korea
| Place | Best months | Warmest month |
|---|---|---|
| Seoul | Apr–May, Sep–Nov | Aug (28°C) |
| Busan | Apr–May, Sep–Oct | Aug (27°C) |
| Jeju | Apr–May, Sep–Oct | Aug (28°C) |
| Gyeongju | Apr–May, Oct–Nov | Aug (28°C) |
| Seogwipo | Apr–May, Sep–Oct | Aug (28°C) |
| Incheon | Apr–May, Sep–Oct | Aug (28°C) |
| Jeonju | Apr–May, Sep–Nov | Aug (29°C) |
| Sokcho | May–Jun, Sep–Oct | Aug (27°C) |
| Gangneung | May–Jun, Sep–Oct | Aug (27°C) |
| Daegu | Apr–May, Sep–Oct | Aug (30°C) |
| Yeosu | Apr–May, Sep–Oct | Aug (30°C) |
Quick answers
What is the best month to visit Seoul?
Apr–May, Sep–Nov. Apr–May and Sep–Nov are mild and clear; cherry blossom and autumn leaves draw crowds. Jul–Aug is humid with monsoon rain; Dec–Feb is dry and very cold.
When is the rainy season in Seoul?
Rain peaks in July with about 361 mm. Months with 150 mm or more: Jul–Aug.
What is the hottest month in Seoul?
August, with average highs of 28°C (83°F).
How cold does Seoul get?
The coolest nights are in January, averaging -7°C (20°F).
More about Seoul
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Sources
- NASA POWER climatology (2001–2020)
- Visit Korea (Korea Tourism Organization)
- Seoul Metro
- Incheon International Airport
- Seoul Global Center
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.