Year-round weather and climate in Incheon, South Korea
Average temperatures in Incheon run from an average low of -5°C23°F in January up to an average high of 29°C84°F in August. January is the driest month at 5 rainy days; August the wettest at 19. Here is the annual climate data, so you know what you are packing for.
Good to know
- Population
- 3M
- Currency
- KRW
- Language
- Korean
- Time zone
- Seoul
Best time to visit
For the warmest temperatures and best chance of outdoor activities, plan your trip around April, May, and June.
Rain character
Tropical Downpours: Expect intense bursts of rain during wetter months. Pack quick-drying footwear and a compact umbrella.
Day-to-night swing
Evening Chill: Temperatures drop by a noticeable 10°C18°F when the sun goes down. A light sweater or jacket is usually all you need for evening plans.
Seasonality Profile
True Four Seasons: Dramatic contrasts. Freezing winters, transitional shoulders, and blazing summers.
Evening vibe
Cozy Indoor Culture: Evenings are generally crisp, damp, or sweltering. Nightlife centers around indoor venues.
Sightseeing stamina
All-Day Strolling: Weather is generally forgiving for long walking days. Comfortable sneakers are your most important packing item.
Average temperatures, sunshine, and rainfall
Average monthly weather in Incheon, based on recent historical data. Essential insights on temperature swings, expected rainfall, and daily sunshine.
Bars span the average daily low to high. Jan is typically driest at 5 days (29mm); Aug the wettest at 19 days (348mm).
| Month | Average high | Average low | Sunshine hours | Rainy days | Total rainfall |
|---|---|---|---|---|---|
| Jan | 3°C / 37°F | -5°C / 22°F | 7h | 5 | 29mm |
| Feb | 5°C / 41°F | -3°C / 26°F | 8h | 5 | 30mm |
| Mar | 11°C / 51°F | 1°C / 34°F | 9h | 6 | 52mm |
| Apr | 16°C / 61°F | 7°C / 45°F | 9h | 6 | 57mm |
| May | 21°C / 69°F | 12°C / 54°F | 9h | 9 | 124mm |
| Jun | 25°C / 77°F | 18°C / 64°F | 9h | 10 | 173mm |
| Jul | 28°C / 83°F | 22°C / 72°F | 9h | 18 | 288mm |
| Aug | 29°C / 84°F | 23°C / 73°F | 9h | 19 | 348mm |
| Sep | 26°C / 78°F | 18°C / 65°F | 8h | 10 | 182mm |
| Oct | 19°C / 66°F | 10°C / 50°F | 8h | 6 | 58mm |
| Nov | 12°C / 54°F | 3°C / 38°F | 7h | 6 | 69mm |
| Dec | 3°C / 38°F | -4°C / 24°F | 7h | 5 | 23mm |
Weather data by Open-Meteo.com (opens in a new tab)
Frequently Asked Questions
When is the sunniest time of year to visit Incheon?
The most sunshine in Incheon comes around May, averaging 9 hours a month. If you're heading there then, pack your sunglasses and sunscreen.
What clothes should I pack for Incheon?
Your packing list depends entirely on when you travel. Temperatures in Incheon swing from an average low of -5°C23°F in January up to 29°C84°F in August. The Packola app builds a tailored packing list for you based on the live weather forecast for your exact travel dates.
Do I need to pack an umbrella for Incheon?
Incheon gets rain on about 105 days out of the year. The wettest month is August. If you're traveling during the rainy season, you'll definitely want to pack an umbrella and a light rain jacket.
Pack smarter.
Averages get you close, but the week you travel is what matters. Get the live forecast, a smart packing list, and discover the best local spots and activities in Incheon with Packola.
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