Incheon Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Incheon.
Climate overview of Incheon
Incheon, Chungcheongbuk-Do, South Korea, experiences significant temperature variation throughout the year. Summers bring daytime highs of 29°C (84°F) in August, while winters cool to 3°C (37°F) in January.
With around 1208 mm (48 in) of annual rain/snowfall, Incheon has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has a distinct dry season from December to March, with warm summers and cold winters. The wettest month is July. The most sunshine falls in May, with an average of 8.1 hours of daily sunshine.
Incheon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Incheon - and find the best time to visit.
Monthly Temperature in Incheon
Depending on the time of the year, temperatures range from comfortable to chilly in Incheon. Average daytime temperatures reach a comfortable 29°C (84°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 3°C (37°F).
At night, temperatures range from around 23°C (73°F) in August to -5°C (23°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Incheon
Incheon has a relatively rain/snowy climate with high precipitation levels, averaging 1208 mm (48 in) of rain/snowfall annually. Incheon can be quite wet during July, receiving approximately 302 mm (12 in) of precipitation over 15 rainy days.
In contrast, during the driest month (January), you will experience much drier conditions, with 22 mm (0.9 in) of precipitation spread across 7 snowy/rainy days. For more details, please visit our Incheon Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Incheon
Incheon experiences moderate variation in sunshine hours across the seasons. With 8.1 hours daily sunshine in May, it dips to 5.4 hours in July, offering a balanced mix of sunny and overcast days.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Incheon by Month
The relative humidity is high throughout the year in Incheon.
The city experiences its highest humidity in July, reaching 82%. In January, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Incheon
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May and October
- Warmest weather: July and August
- Most sunshine: May
- Wettest months: June, July, August and September, when rainfall is highest.
- Seasonal pattern: A distinct dry season from December to March, with warm summers and cold winters
- Coldest conditions: January, with freezing nights around -5°C (23°F).
Frequently asked questions about the climate in Incheon
What is the best time to visit Incheon?
May and October typically offer the most optimal weather in Incheon. In contrast, January, March and July tend to have less optimal conditions. Incheon has a distinct dry season from December to March, with warm summers and cold winters.
What temperatures can I expect in Incheon?
Daytime highs range from 3°C (37°F) in January to 29°C (84°F) in August. Nighttime lows range from -5°C (23°F) to 23°C (73°F). Temperatures vary considerably through the year.
How much rain does Incheon get?
Annual rainfall is around 1208 mm (48 in). July is the wettest month with 302 mm (12 in), while January is the driest with 22 mm (0.9 in).
How sunny is Incheon?
Incheon receives around 2,397 hours of sunshine per year. May is the sunniest month with 242 hours, while July is the cloudiest with just 161 hours. Overall, Incheon enjoys abundant sunshine.
Incheon 3-Day Forecast
Incheon on the map
Incheon is highlighted - select any city to see its climate.
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