The best times to visit Jangsu for ideal weather are

April 30th to July 1st

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



Other Jangsu Travel Info

Weather in Jangsu


Average temperatures in Jangsu vary an incredible amount. 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 30th 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 Jangsu, the hottest months are August, July, and then June. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 89.8°F (32.1°C) with temperatures rarely dropping below 72.1°F (22.3°C) at night.

Jangsu Temperatures (Fahrenheit)


Jangsu Temperatures (Celsius)


“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.

Jangsu Perceived Temperature (F)


Jangsu Perceived Temperature (C)



Average Jangsu 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 38.9 27.7 16.2
Feb 45.5 34.3 23.1
Mar 54.8 42.1 28.6
Apr 65.6 52.2 37.8
May 77.1 64 49.9
Jun 82.5 72.3 62.5
Jul 85.3 77.1 70
Aug 86.6 77.6 70.3
Sep 80.5 69 59
Oct 70.9 56.6 43.9
Nov 56.8 45.1 34.6
Dec 41.9 31.6 22.1

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 3.8 -2.4 -8.8
Feb 7.5 1.3 -4.9
Mar 12.7 5.6 -1.9
Apr 18.7 11.2 3.2
May 25.1 17.8 9.9
Jun 28.1 22.4 16.9
Jul 29.6 25.1 21.1
Aug 30.3 25.3 21.3
Sep 26.9 20.6 15
Oct 21.6 13.7 6.6
Nov 13.8 7.3 1.4
Dec 5.5 -0.2 -5.5



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Jangsu are January, February, and then October. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid January. For example, on the week of January 8th 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 Jangsu? Weather stations report moderate or seasonal snow likely to be deepest around December, especially close to early December. The best time to ski (if at all) in Jangsu is often around around March 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.

Chance of Precipitation

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

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 9% 1.1 0.8
Feb 13% 1.2 1.6
Mar 18% 1.8 2.5
Apr 20% 0 3.2
May 17% 0 3.2
Jun 20% 0 4.1
Jul 37% 0 13
Aug 32% 0 10.3
Sep 17% 0 5.5
Oct 14% 0 2.9
Nov 20% 0 2.6
Dec 17% 2.2 1.6

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 9 2.8 2
Feb 13 3 4.1
Mar 18 4.6 6.4
Apr 20 0 8.1
May 17 0 8.1
Jun 20 0 10.4
Jul 37 0 33
Aug 32 0 26.2
Sep 17 0 14
Oct 14 0 7.4
Nov 20 0 6.6
Dec 17 5.6 4.1


Humidity and Wind

Jangsu has some very humid months, with other moderately humid months on the other side of the year. The least humid month is March (44.4% relative humidity), and the most humid month is July (72.1%).

Wind in Jangsu is usually extremely calm. The windiest month is April, followed by March and May. April’s average wind speed of around 4 knots (4.7 MPH or 7.5 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late April where average top sustained speeds reach 8.9 knots, which is considered a gentle breeze.

Relative Humidity (%)

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

Avg. Relative Humidity


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

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 2.9 Barely noticeable 6.3 Light breeze
Feb 3.2 Barely noticeable 6.7 Light breeze
Mar 3.9 Barely noticeable 7.9 Light breeze
Apr 4 Light breeze 8.3 Gentle breeze
May 3.5 Barely noticeable 7.2 Light breeze
Jun 3.1 Barely noticeable 6.6 Light breeze
Jul 3 Barely noticeable 6.3 Light breeze
Aug 2.9 Barely noticeable 6 Light breeze
Sep 2.7 Barely noticeable 5.3 Light breeze
Oct 2.8 Barely noticeable 5.8 Light breeze
Nov 2.9 Barely noticeable 6 Light breeze
Dec 2.8 Barely noticeable 5.9 Light breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 54.3%
Feb 49.7%
Mar 44.4%
Apr 46.1%
May 49.2%
Jun 59.7%
Jul 72.1%
Aug 71.9%
Sep 66%
Oct 60.6%
Nov 61.4%
Dec 59.8%


Is it Safe to Travel to Jangsu?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for South Korea; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 30, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Jangsu, South Korea is January, followed by May and April. 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 Jangsu in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

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 somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 73.7 in December means 73.7% of the tourists vs. January.



Overall Jangsu Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 80.3°F (26.8°C) and 49.5°F (9.7°C) with far warmer temperatures in the later months. Rain is somewhat common with 5 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 6 to 11 days of precipitation per month. June – August is fairly slow season for tourism in Jangsu, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 82.3°F (27.9°C) and 50.9°F (10.5°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 the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Jangsu to be enjoyable for warm weather travelers. The average high during this season is between 50.1°F (10.1°C) and 36.2°F (2.3°C). On average, it rains or snows a fair amount: 3 to 5 times per month. These times of year are the second busiest with tourists.


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