City, South Korea
Incheon weather by month and the best time to visit
When to go to Incheon
Apr–May and Sep–Oct are mild and clear. Jul–Aug is hot and humid with monsoon rain; winters are cold and windy off the sea.
Incheon 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 Incheon?
Apr–May, Sep–Oct. Apr–May and Sep–Oct are mild and clear. Jul–Aug is hot and humid with monsoon rain; winters are cold and windy off the sea.
When is the rainy season in Incheon?
Rain peaks in July with about 361 mm. Months with 150 mm or more: Jul–Aug.
What is the hottest month in Incheon?
August, with average highs of 28°C (83°F).
How cold does Incheon get?
The coolest nights are in January, averaging -7°C (20°F).
More about Incheon
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Sources
- NASA POWER climatology (2001–2020)
- Incheon International Airport
- Incheon Metropolitan City Tourism
- Visit Korea (Korea Tourism Organization)
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.