Incheon, a vibrant coastal city near Seoul, experiences a humid continental climate with four distinct seasons. Summers are warm, humid, and rainy, while winters are cold, dry, and often windy. Spring and autumn offer mild temperatures and colourful scenery, making them the most comfortable and scenic times to explore Incheon’s diverse urban and natural attractions.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Incheon’s climate is defined by sharp seasonal contrasts and its proximity to the Yellow Sea. Summers (June–August) are hot, humid, and wet, with average highs of 28–30°C and lows around 21–24°C. July and August are the rainiest months, each receiving 275–340 mm of rain, mainly from the East Asian monsoon. Humidity is high, and typhoons can occasionally affect the region, bringing intense downpours and gusty winds. Sunshine is limited in July, with only about 5 hours per day, but summer days are long, with up to 14 hours of daylight.
Winters (December–February) are cold and dry, with average highs of 2–5°C and lows dipping to -6°C or lower. Snow is possible, but heavy accumulations are rare and melt quickly. January is the coldest month, with brisk northwesterly winds and frequent clear skies. Spring (March–May) and autumn (September–November) are the most pleasant seasons, offering mild temperatures (10–22°C), moderate rainfall, and abundant sunshine (6–7.5 hours per day). Spring brings cherry blossoms and occasional yellow dust from China, while autumn is known for crisp air, clear skies, and vibrant foliage. Annual precipitation is about 1,200 mm, with most rainfall concentrated in summer. Winds are moderate, strongest from February to April, and fog is common along the coast, especially in spring and early summer.
| Average climate data for Incheon, South Korea | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 2 | 5 | 10 | 16 | 21 | 26 | 28 | 29 | 25 | 20 | 12 | 5 | 29 |
| Average minimum temperature (°C) | -5 | -3 | 2 | 8 | 13 | 18 | 21 | 22 | 17 | 11 | 4 | -3 | -5 |
| Average precipitation (mm) | 21 | 21 | 40 | 58 | 101 | 112 | 323 | 284 | 151 | 53 | 52 | 19 | 1,236 |
| Average rainfall days (days) | 7 | 5 | 7 | 7 | 9 | 10 | 15 | 12 | 8 | 6 | 8 | 7 | 102 |
| Average relative humidity (%) | 60 | 62 | 62 | 63 | 69 | 76 | 83 | 79 | 73 | 68 | 64 | 61 | 68 |
| Average water temperature (°C) | 5 | 3 | 4 | 8 | 13 | 19 | 22 | 23 | 22 | 19 | 14 | 9 | 13 |
| Average daily daylight hours (h) | 9 | 10 | 12 | 13 | 14 | 14 | 14 | 13 | 12 | 11 | 10 | 9 | 12 |
| Average daily sunshine hours (h) | 5 | 6 | 6 | 7 | 7 | 6 | 5 | 6 | 6 | 6 | 5 | 5 | 6 |
The best time to visit Incheon is during late spring (April–June) and early autumn (September–October), when temperatures are mild (15–25°C), rainfall is lower, and the city is alive with cherry blossoms or autumn foliage. These seasons offer the most comfortable weather for sightseeing, outdoor activities, and enjoying local festivals.
The least favourable time is July and August, when Incheon is hottest, most humid, and rainiest. The monsoon brings heavy downpours, high humidity, and occasional typhoons, making outdoor activities challenging and causing potential travel disruptions.
Incheon has a humid continental climate with hot, humid, rainy summers (28–30°C) and cold, dry winters (2–5°C by day, -6°C at night). Spring and autumn are mild and sunny, with colourful blossoms or foliage.
The best time to visit Incheon is from April to June and September to October, when temperatures are mild, rainfall is low, and the city hosts cherry blossom or autumn festivals.
Yes, snow is possible in Incheon from December to February, but heavy snow is rare and usually melts quickly. Most winter precipitation falls as light snow or rain.
Incheon receives about 1,200 mm of precipitation annually, with over half falling in July and August during the monsoon. Spring and autumn are drier, while winter is the driest season.
Yes, Incheon is very humid in summer, with humidity often above 75%. Winters are much drier, with humidity dropping below 65%. Sea breezes help moderate the heat and humidity.
Typhoons can occasionally affect Incheon, especially from July to September, bringing heavy rain and strong winds. It’s wise to check weather forecasts if travelling in late summer.
Pack light, breathable clothing and an umbrella for summer. In spring and autumn, bring layers and a mask for yellow dust. For winter, pack warm, windproof clothing. Always check the forecast for rain or dust advisories.
The warmest month, with the highest average maximum temperature, is August (29.1 °C). The month with the lowest average maximum temperature is January (1.7 °C). Overall, the average maximum temperature over the whole year is 16.4 °C.
The month with the highest average minimum temperature is August (22.3 °C). The coldest month, with the lowest average minimum temperature, is January (-5.5 °C). Overall, the average minimum temperature over the whole year is 8.7 °C.
The month with the highest average water temperature is August (23.4 °C). The month with the lowest average water temperature is February (3.3 °C). Overall, the average water temperature over the whole year is 13.4 °C.
The wettest month, with the highest amount of precipitation, is July (322.5 mm). The driest month, with the least amount of precipitation, is December (19.4 mm). Over the whole year there are 1,235.6 mm of rainfall on average.
The month with the most days of rain is July (15 days). The month with the fewest days of rain is February (5.2 days). Over the whole year there are 101.7 days of rain on average.
The month with the highest average relative humidity is July (83.3 %). The month with the lowest average relative humidity is January (60.4 %). The overall average relative humidity over the whole year is 68.5 %.
The month with the longest days, so the most daylight, is June (Average daylight: 14.1 h). The month with the shortest days, so the least daylight, is December (Average daylight: 9.1 h). Over the whole year there are 11.8 h of daylight per day on average.
The month with the most sunshine per day is May (Average sunshine: 7.1 h). The month with the least sunshine per day is January (Average sunshine: 5 h). Over the whole year there are 5.9 h of sunlight per day on average.
