The best times to visit Cheonan for ideal weather are

April 30th to June 24th

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



Other Cheonan Travel Info

Weather in Cheonan


Average temperatures in Cheonan 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 29th 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 Cheonan, 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 90.3°F (32.4°C) with temperatures rarely dropping below 73.7°F (23.2°C) at night.

Cheonan Temperatures (Fahrenheit)


Cheonan 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.

Cheonan Perceived Temperature (F)


Cheonan Perceived Temperature (C)



Average Cheonan 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 36.1 26.5 15.4
Feb 42.8 33.3 23.1
Mar 52.5 41.7 29.9
Apr 64.6 52.7 39.6
May 76.9 65.1 52.7
Jun 83.6 73.2 63.4
Jul 85.8 77.8 70.8
Aug 86.9 78.3 71.2
Sep 79.8 69.1 59.6
Oct 70.1 57 44.8
Nov 55.1 45.4 35.5
Dec 39.4 30.6 21

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 2.3 -3.1 -9.2
Feb 6 0.7 -4.9
Mar 11.4 5.4 -1.2
Apr 18.1 11.5 4.2
May 24.9 18.4 11.5
Jun 28.7 22.9 17.4
Jul 29.9 25.4 21.6
Aug 30.5 25.7 21.8
Sep 26.6 20.6 15.3
Oct 21.2 13.9 7.1
Nov 12.8 7.4 1.9
Dec 4.1 -0.8 -6.1



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Cheonan are February, January, 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 Cheonan? Weather stations report a good amount of seasonal snow likely to be deepest around March, especially close to early to mid March. The best time to ski (if at all) in Cheonan is often around around March 12th 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 Cheonan.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Cheonan (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% 1.5 0.8
Feb 7% 0.9 1
Mar 15% 2.4 1.8
Apr 19% 0 3.1
May 13% 0 3
Jun 17% 0 4.7
Jul 35% 0 12.4
Aug 33% 0 10.9
Sep 21% 0 5.8
Oct 12% 0 2.2
Nov 21% 1.4 2.4
Dec 14% 1.5 1.5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 9 3.8 2
Feb 7 2.3 2.5
Mar 15 6.1 4.6
Apr 19 0 7.9
May 13 0 7.6
Jun 17 0 11.9
Jul 35 0 31.5
Aug 33 0 27.7
Sep 21 0 14.7
Oct 12 0 5.6
Nov 21 3.6 6.1
Dec 14 3.8 3.8


Humidity and Wind

Cheonan has some very humid months, with other moderately humid months on the other side of the year. The least humid month is April (45.5% relative humidity), and the most humid month is August (73.8%).

Wind in Cheonan is usually extremely calm. The windiest month is March, followed by April and May. March’s average wind speed of around 5.1 knots (5.9 MPH or 9.5 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 early March where average top sustained speeds reach 10 knots, which is considered a gentle breeze.

Relative Humidity (%)

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

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 3.8 Barely noticeable 7.8 Gentle breeze
Feb 4.1 Light breeze 7.8 Gentle breeze
Mar 5.1 Light breeze 9.4 Gentle breeze
Apr 5 Light breeze 9.2 Gentle breeze
May 4.2 Light breeze 8 Gentle breeze
Jun 3.6 Barely noticeable 6.6 Light breeze
Jul 3.5 Barely noticeable 6.4 Gentle breeze
Aug 3.4 Barely noticeable 6.3 Light breeze
Sep 3.1 Barely noticeable 6 Gentle breeze
Oct 3.2 Barely noticeable 6.6 Light breeze
Nov 3.9 Barely noticeable 7.7 Gentle breeze
Dec 3.9 Barely noticeable 7.6 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 55.4%
Feb 51.2%
Mar 45.8%
Apr 45.5%
May 48.7%
Jun 58.9%
Jul 73.4%
Aug 73.8%
Sep 67%
Oct 60.4%
Nov 60.3%
Dec 57.9%


Is it Safe to Travel to Cheonan?

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 Cheonan, 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 Cheonan 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 Cheonan Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 80.6°F (27°C) and 48.1°F (8.9°C) with far warmer temperatures in the later months. Rain is somewhat common with 4 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 11 days of precipitation per month. June – August is fairly slow season for tourism in Cheonan, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 82°F (27.8°C) and 49.1°F (9.5°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 Cheonan to be enjoyable for warm weather travelers. The average high during this season is between 48.1°F (8.9°C) and 33.5°F (0.8°C). On average, it rains or snows a smalll amount: 2 to 4 times per month. These times of year are the second busiest with tourists.


Best Times to TravelSouth Korea › Cheonan, South Korea