The best times to visit Incheon for ideal weather are

April 23rd to July 8th

or

September 3rd to November 4th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

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Weather in Incheon

Temperature

Average temperatures in Incheon vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 39th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Incheon, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 85.1°F (29.5°C) with temperatures rarely dropping below 75.5°F (24.2°C) at night.

Incheon Temperatures (Fahrenheit)

Key
High
Average
Low

Incheon Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Incheon Perceived Temperature (F)

Key
High
Average
Low

Incheon Perceived Temperature (C)

Key
High
Average
Low

 

Average Incheon Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 35 28.7 21.5
Feb 40.9 33.9 26.8
Mar 49.3 42.1 35
Apr 59.5 52.1 45.4
May 69.9 62.3 55.4
Jun 77.8 70.8 64.5
Jul 80.7 75.4 71
Aug 83.6 78 73.2
Sep 77.5 71 64.6
Oct 67.6 60.2 52.8
Nov 53.2 46.7 39.6
Dec 38.6 32.3 25.3

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 1.7 -1.8 -5.8
Feb 4.9 1.1 -2.9
Mar 9.6 5.6 1.7
Apr 15.3 11.2 7.4
May 21.1 16.8 13
Jun 25.4 21.6 18.1
Jul 27.1 24.1 21.7
Aug 28.7 25.6 22.9
Sep 25.3 21.7 18.1
Oct 19.8 15.7 11.6
Nov 11.8 8.2 4.2
Dec 3.7 0.2 -3.7


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Incheon are February, January, and then December. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid July with an average of 3 days of significant precipitation the week of July 9th.

When can you find snow in Incheon? Weather stations report moderate or seasonal snow likely to be deepest around February, especially close to early February. The best time to ski (if at all) in Incheon is often around around February 5th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chanceof Precipitation

The graph below shows the % chance of rainy and snowy days in Incheon.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Incheon (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 6% 1.9 0.5
Feb 6% 2.2 1.1
Mar 11% 0.9 1.5
Apr 19% 0 2.7
May 15% 0 3.4
Jun 17% 0 4.7
Jul 34% 0 16.4
Aug 32% 0 9.5
Sep 20% 0 6.2
Oct 12% 0 2.3
Nov 18% 0 2.3
Dec 9% 1.4 0.9

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 6 4.8 1.3
Feb 6 5.6 2.8
Mar 11 2.3 3.8
Apr 19 0 6.9
May 15 0 8.6
Jun 17 0 11.9
Jul 34 0 41.7
Aug 32 0 24.1
Sep 20 0 15.7
Oct 12 0 5.8
Nov 18 0 5.8
Dec 9 3.6 2.3

 

Humidity and Wind

Incheon has some extremely humid months, with other moderately humid months on the other side of the year. The least humid month is January (49.9% relative humidity), and the most humid month is July (83.3%).

Wind in Incheon is usually calm. The windiest month is March, followed by December and April. March’s average wind speed of around 7.2 knots (8.3 MPH or 13.3 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early March where average top sustained speeds reach 12.1 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Incheon.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 6.1 Light breeze 9.8 Gentle breeze
Feb 6.3 Light breeze 9.8 Gentle breeze
Mar 7.2 Gentle breeze 11.1 Gentle breeze
Apr 6.7 Light breeze 10.4 Gentle breeze
May 5.6 Light breeze 8.7 Gentle breeze
Jun 4.7 Light breeze 7.8 Gentle breeze
Jul 5.1 Light breeze 8.3 Gentle breeze
Aug 5.1 Light breeze 8.2 Gentle breeze
Sep 4.6 Light breeze 7.9 Gentle breeze
Oct 5.1 Light breeze 8.6 Gentle breeze
Nov 6.3 Light breeze 9.9 Gentle breeze
Dec 6.8 Light breeze 10.7 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 49.9%
Feb 51.7%
Mar 53.9%
Apr 55.8%
May 62%
Jun 70.7%
Jul 83.3%
Aug 78.9%
Sep 67.6%
Oct 59.5%
Nov 59.2%
Dec 54.4%

 

Is it Safe to Travel to Incheon?

Our best data indicates this area is generally safe. As of Dec 12, 2018 there are no travel advisories or warnings for Korea, South; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories


 

The Busiest and Least Crowded Months

The busiest month for tourism in Incheon, South Korea is April, followed by March and September. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Incheon in July. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 56.7 in July means 56.7% of the tourists vs. April.



Overall Incheon Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 74.1°F (23.4°C) and 44.9°F (7.2°C) with warmer temperatures in the later months. Rain is somewhat common with 3 to 6 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 5 to 10 days of precipitation per month. June – August is the slowest season for tourism in Incheon, so lodging and other accommodations may cost less than usual.

Fall (September through November)

Fall daily highs range from 79.6°F (26.4°C) and 47.7°F (8.7°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: 4 to 6 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is far too cold this time of year in Incheon to be enjoyable for warm weather travelers. The average high during this season is between 46.6°F (8.1°C) and 32.7°F (0.4°C). On average, it rains or snows a smalll amount: 2 to 3 times per month. These times of year are the second busiest with tourists.

 

Best Times to TravelSouth Korea › Incheon, South Korea

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