The best times to visit Seongsan for ideal weather are

April 16th to July 8th

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



Other Seongsan Travel Info

Weather in Seongsan


Average temperatures in Seongsan vary drastically. Considering humidity, temperatures feel nice most of the year, excluding some cold weeks in the winter, with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 34th 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 Seongsan, 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 87.7°F (30.9°C) with temperatures rarely dropping below 76.7°F (24.8°C) at night.

Seongsan Temperatures (Fahrenheit)


Seongsan 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.

Seongsan Perceived Temperature (F)


Seongsan Perceived Temperature (C)



Average Seongsan 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 47 40.9 34.4
Feb 49.8 43.5 36.5
Mar 56.2 48.7 40.2
Apr 64.3 56.9 47.9
May 72.3 64.8 56.8
Jun 75 69.9 65.3
Jul 83.1 77.8 73.2
Aug 85.1 79.4 74.7
Sep 79.7 73.5 67.9
Oct 72 65.3 58.5
Nov 62.6 56.1 49.3
Dec 50.5 44.1 37.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 8.3 4.9 1.3
Feb 9.9 6.4 2.5
Mar 13.4 9.3 4.6
Apr 17.9 13.8 8.8
May 22.4 18.2 13.8
Jun 23.9 21.1 18.5
Jul 28.4 25.4 22.9
Aug 29.5 26.3 23.7
Sep 26.5 23.1 19.9
Oct 22.2 18.5 14.7
Nov 17 13.4 9.6
Dec 10.3 6.7 3.2



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Seongsan are October, January, and then March. 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 mid to late August with an average of 4 days of significant precipitation the week of August 20th.

When can you find snow in Seongsan? Weather stations report moderate or seasonal snow likely to be deepest around December, especially close to late December. The best time to ski (if at all) in Seongsan is often around around December 17th 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 Seongsan.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 11% 1.6 1.8
Feb 27% 1.1 5
Mar 20% 0 5.5
Apr 28% 0 8.4
May 20% 0 7.1
Jun 32% 0 10.1
Jul 27% 0 7.3
Aug 36% 0 15.2
Sep 24% 0 7.2
Oct 10% 0 4.1
Nov 29% 0 9.5
Dec 28% 1.9 4.6

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 11 4.1 4.6
Feb 27 2.8 12.7
Mar 20 0 14
Apr 28 0 21.3
May 20 0 18
Jun 32 0 25.7
Jul 27 0 18.5
Aug 36 0 38.6
Sep 24 0 18.3
Oct 10 0 10.4
Nov 29 0 24.1
Dec 28 4.8 11.7


Humidity and Wind

Seongsan has some extremely humid months, with other comfortably humid months. The least humid month is March (54.6% relative humidity), and the most humid month is July (86.2%).

Wind in Seongsan is usually calm. The windiest month is April, followed by March and February. April’s average wind speed of around 6.6 knots (7.6 MPH or 12.3 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 August to early September where average top sustained speeds reach 11.3 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 6.1 Light breeze 9.3 Gentle breeze
Feb 6.5 Light breeze 9.9 Gentle breeze
Mar 6.6 Light breeze 10.4 Gentle breeze
Apr 6.6 Light breeze 10.7 Gentle breeze
May 5.5 Light breeze 9 Gentle breeze
Jun 5 Light breeze 8.5 Gentle breeze
Jul 6.2 Light breeze 9.8 Gentle breeze
Aug 6.4 Light breeze 10.3 Gentle breeze
Sep 6.1 Light breeze 9.3 Gentle breeze
Oct 6.2 Light breeze 9.7 Gentle breeze
Nov 5.7 Light breeze 9 Gentle breeze
Dec 6 Light breeze 9.5 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 57%
Feb 59%
Mar 54.6%
Apr 59.5%
May 66.5%
Jun 85.1%
Jul 86.2%
Aug 82.1%
Sep 72.2%
Oct 63.8%
Nov 65.5%
Dec 60.8%


Is it Safe to Travel to Seongsan?

Our best data indicates this area is generally safe. As of Oct 07, 2019 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 03, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Seongsan, 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 Seongsan 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 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 Seongsan Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 73.8°F (23.2°C) and 52.5°F (11.4°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 8 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 8 to 11 days of precipitation per month. June – August is fairly slow season for tourism in Seongsan, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 81.1°F (27.3°C) and 58.4°F (14.7°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 3 to 9 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 too cold this time of year in Seongsan to be enjoyable for warm weather travelers. The average high during this season is between 52.5°F (11.4°C) and 45.8°F (7.7°C). On average, it rains or snows a fair amount: 3 to 9 times per month. These times of year are the second busiest with tourists.


Best Times to TravelSouth Korea › Seongsan, South Korea