AI-generatedCheonan at a glance
- Best time
- Apr – Jun, Sep – Oct
- Warmest month
- Aug · 31°
- Sunshine a year
- 2,270 h
- Rain a year
- 1,135 mm
- Climate
- Continental
- Time zone
- UTC+9
- Elevation
- 40 m
Climate in Cheonan
Cheonan has warm to hot summers and cold winters with occasional snow. August is the warmest month with average highs of 31 °C, while January is the coolest at 4 °C. With around 2,270 hours of sunshine a year, Cheonan is sunny; May is the sunniest month with 7.8 hours a day.
Holiday weather through the year
Best time to visit Cheonan
The best time to visit Cheonan is from April to June and from September to October. In September and October, though, the typhoon season is at its peak: check the forecast before you go. For sightseeing, day trips and hiking, conditions are most comfortable from April to June and from September to October. Rain is frequent from July to August; the wettest month is July with 270 mm.
Cheonan through the seasons
How the weather changes over the seasons, with averages for each.
Cheonan in spring
Mar – May
Good
- 12–25 °C by day
- 7.3 h of sun a day
- 21 rainy days in all
Cheonan in summer
Jun – Aug
Fair
- 28–31 °C by day
- 6.0 h of sun a day
- 40 rainy days in all
Cheonan in autumn
Sep – Nov
Good
- 13–27 °C by day
- 6.0 h of sun a day
- 20 rainy days in all
Cheonan in winter
Dec – Feb
Poor
- 4–6 °C by day
- 5.6 h of sun a day
- 13 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – Jun, Sep – Oct
15–28 °C and not too much rain
Rainy months
Jul – Aug
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Cheonan for you.
Your best months: May, October
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Excellent
Best time to visit: April – June, September – October
October is the peak of the typhoon season Hurricane season
Good forSightseeing & walks
Keep in mindStorm season
A typical day in October
- Morning, 08:00: about 12°
- Midday, 13:00: about 21°
- Afternoon, 16:00: about 20°
- Evening, 20:00: about 14°
- Night, 23:00: about 12°
06:3817:56
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:22–07:13 · evening 17:21–18:12
- Blue hour
- Morning 06:12–06:22 · evening 18:12–18:22
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Cheonan compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 24° at the start of the month to 17° at the end. The days get 1.1 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 24° | 17° |
| Night-time low | 12° | 5° |
| Daylight | 11.9 h | 10.8 h |
What is the weather like in Cheonan in October?
In October, Cheonan is mild: daytime highs average 21 °C, and nights cool down to about 8 °C. The sun shines for around 6.6 hours a day. Rain falls on about 5 days, adding up to 58 mm. All in all, October is an excellent month for a holiday in Cheonan.
More details for October
- Daylight
- 11 h 19 min06:38 – 17:56
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 13 km/haverage daily peakAll months
- Cloud cover
- 47 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+9offset from UTC
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %60 %
- Few rainy daysweight 30 %91 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- A jumper for the evenings
Compare two months in Cheonan
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
October and May bring similar holiday weather to Cheonan (score 89 and 89). In May, days are 4 °C warmer than in October. May has 2 more rainy days. The sun shines an hour longer a day in May.
| Month | October | May |
|---|---|---|
| Holiday weather score | 89 | 89 |
| Daytime high | 21° | 25° |
| Night-time low | 8° | 12° |
| Sunshine | 6.6 h | 7.8 hbetter |
| Rainy days | 5better | 7 |
| Rainfall | 58 mmbetter | 87 mm |
| Muggy days | 1 | 0better |
Based on the climate averages 1996–2025.
Cheonan month by month
The typical weather for every month at a glance.
38January4° · 5.4 h
In January, Cheonan is cold: daytime highs average 4 °C, and nights often drop below freezing (−7 °C). Expect around 5.4 hours of sunshine a day. Precipitation falls on about 4 days, totalling 21 mm; on about 2 of them it snows. All in all, January is not an ideal month for a holiday in Cheonan.
Cheonan in January41February6° · 6.3 h
In February, Cheonan is cold: daytime highs average 6 °C, and nights often drop below freezing (−5 °C). Expect around 6.3 hours of sunshine a day. Rain is rare: about 4 days bring 25 mm in total. All in all, February is a so-so month for a holiday in Cheonan.
Cheonan in February59March12° · 6.8 h
In March, Cheonan is cool: daytime highs average 12 °C, and nights cool down to about 0 °C. The sun shines for around 6.8 hours a day. Rain falls on about 6 days, adding up to 42 mm. All in all, March is a so-so month for a holiday in Cheonan.
Cheonan in March88April19° · 7.4 h
In April, Cheonan is mild: daytime highs average 19 °C, and nights cool down to about 5 °C. The sun shines for around 7.4 hours a day. Rain falls on about 7 days, adding up to 70 mm. All in all, April is an excellent month for a holiday in Cheonan.
Cheonan in April89May25° · 7.8 h
In May, Cheonan is warm: daytime highs average 25 °C, and nights cool down to about 12 °C. The sun shines for around 7.8 hours a day. Rain falls on about 7 days, adding up to 87 mm. All in all, May is an excellent month for a holiday in Cheonan.
Cheonan in May77June28° · 6.9 h
In June, Cheonan is hot: daytime highs average 28 °C, and nights cool down to about 17 °C. The sun shines for around 6.9 hours a day. Rain falls on about 8 days, adding up to 124 mm. On about 7 days the thermometer climbs to 30 °C or more. All in all, June is a good month for a holiday in Cheonan.
Cheonan in June43July30° · 5.2 h
In July, Cheonan is hot: daytime highs average 30 °C, and even at night it stays warm at around 22 °C. Expect around 5.2 hours of sunshine a day. It rains often – on about 16 days, adding up to 270 mm. On about 16 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a so-so month for a holiday in Cheonan.
Cheonan in July43August31° · 5.9 h
In August, Cheonan is hot: daytime highs average 31 °C, and even at night it stays warm at around 22 °C. Expect around 5.9 hours of sunshine a day. It rains often – on about 15 days, adding up to 226 mm. On about 19 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a so-so month for a holiday in Cheonan.
Cheonan in August81September27° · 6.0 h
In September, Cheonan is warm: daytime highs average 27 °C, and nights cool down to about 16 °C. Expect around 6.0 hours of sunshine a day. Rain falls on about 8 days, adding up to 141 mm. All in all, September is an excellent month for a holiday in Cheonan.
Cheonan in September89October21° · 6.6 h
In October, Cheonan is mild: daytime highs average 21 °C, and nights cool down to about 8 °C. The sun shines for around 6.6 hours a day. Rain falls on about 5 days, adding up to 58 mm. All in all, October is an excellent month for a holiday in Cheonan.
Cheonan in October59November13° · 5.3 h
In November, Cheonan is cool: daytime highs average 13 °C, and nights cool down to about 2 °C. Expect around 5.3 hours of sunshine a day. Rain falls on about 7 days, adding up to 46 mm. All in all, November is a so-so month for a holiday in Cheonan.
Cheonan in November34December6° · 5.0 h
In December, Cheonan is cold: daytime highs average 6 °C, and nights often drop below freezing (−5 °C). Expect around 5.0 hours of sunshine a day. Rain falls on about 5 days, adding up to 23 mm. All in all, December is not an ideal month for a holiday in Cheonan.
Cheonan in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Cheonan
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- muggy month (15+ muggy days)
CoolOctober: nights around 8°. A duvet at night and a jumper for the evening. Muggy on about 1 day (dew point 18 °C or more).
The coolest nights are in January (−7°), the warmest in August (22°). Tropical nights of 20 °C and more are the rule from July to August; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in June and in September. Nights fall below 8 °C on average from November to April, so the room should be heated. It is muggy (dew point 18 °C or more) on about 80 days a year, mostly from July to August.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 38 | 4° | −7° | 5.4 h | 4 | 21 |
| FebruaryFeb | 41 | 6° | −5° | 6.3 h | 4 | 25 |
| MarchMar | 59 | 12° | 0° | 6.8 h | 6 | 42 |
| AprilApr | 88 | 19° | 5° | 7.4 h | 7 | 70 |
| MayMay | 89 | 25° | 12° | 7.8 h | 7 | 87 |
| JuneJun | 77 | 28° | 17° | 6.9 h | 8 | 124 |
| JulyJul | 43 | 30° | 22° | 5.2 h | 16 | 270 |
| AugustAug | 43 | 31° | 22° | 5.9 h | 15 | 226 |
| SeptemberSep | 81 | 27° | 16° | 6.0 h | 8 | 141 |
| OctoberOct | 89 | 21° | 8° | 6.6 h | 5 | 58 |
| NovemberNov | 59 | 13° | 2° | 5.3 h | 7 | 46 |
| DecemberDec | 34 | 6° | −5° | 5.0 h | 5 | 23 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
36.81° N, 127.15° E · 40 m · Asia/Seoul
Sunshine
Sunshine hours in Cheonan
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 6.6 of 11.3 hours of daylight in Cheonan, 58 % of the daylight hours.
Sunshine hours: measured at the weather station 14 km away, averages 1991–2020 (WMO climate normals). Daylight is the time from sunrise to sunset on the 15th of the month.
Rain
Rain in Cheonan: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Cheonan has about 5 rainy days with 58 mm of rain in total.
UV index
UV index in Cheonan
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 5 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 10).
Minutes until sunburn in October
- Very fair skin
- about 30 min
- Fair skin
- about 35 min
- Light brown skin
- about 50 min
- Olive skin
- about 65 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind & clouds
Wind and clouds in Cheonan
How breezy and how cloudy Cheonan is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Cheonan typically peaks at 13 km/h during the day: Beaufort 3, gentle breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 47 % of the sky over Cheonan: variable cloud, with about 6.6 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat & humidity
Heat and humidity in Cheonan
How often the day gets hot in Cheonan (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Cheonan has about 0 hot days, with an average daytime high of 21 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow
Snow in Cheonan
Snow is possible in Cheonan, but no month makes it likely: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in Cheonan.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Planning a trip to Cheonan
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Cheonan in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Cheonan has its best school-holiday weather during October half-term (score 89) and its weakest during the Christmas holidays (score 36).
- 79
Easter holidays
Mar – Apr
Good
- 17 °C by day
- 7.2 h of sun a day
- 7 rainy days a month
- 87
May half-term
May – Jun
Excellent
- 25 °C by day
- 7.6 h of sun a day
- 8 rainy days a month
Good for: Sightseeing & walks
- 43
Summer holidays
Jul – Aug
Fair
- 30 °C by day
- 5.7 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain, Storm season
- 89
October half-term
Oct
ExcellentBest holidays
- 21 °C by day
- 6.6 h of sun a day
- 5 rainy days a month
Good for: Sightseeing & walks
Keep in mind: Storm season
- 36
Christmas holidays
Dec – Jan
Poor
- 5 °C by day
- 5.2 h of sun a day
- 5 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 11 h 15 min
- Distance
- 8,960 km
- Time zone
- UTC+9
- Jet lag
- About 8 days (8 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: South Korea
- Currency
- South Korean Won (KRW)
- Language
- Korean
- Sockets
- Type C, F · 220 V
- Traffic
- Drives on the right
- Dialling code
- +82
- Emergency number
- 112
UK plugs need a travel adapter
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Storm season
Cheonan lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April
- May
- June: Season
- July: Season
- August: Peak
- September: Peak
- October: Peak
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM, Fiji Meteorological Service); not a forecast.
Compare & alternatives
Compare with another place
Cheonan compared
Put Cheonan side by side with another destination.
Cheonan vs Asan
In October the holiday weather in Cheonan and Asan is about equally good (score 89 vs 89). During the day it is about as warm in Asan as in Cheonan.
| in October | Cheonan | Asan |
|---|---|---|
| Holiday weather score | 89 | 89 |
| Daytime high | 21° | 21° |
| Sunshine | 7 h | 7 h |
| Rainy days | 5 | 6 |
| Best time | Apr – Jun, Sep – Oct | Apr – Jun, Sep – Oct |
Through the year
Best places in the country
South Korea in October: the best places
In October, Cheonan ranks 9 among the 31 nearest destinations in this country.
- Gwangyang22°21°92
- 2Yeosu22°21°92
- 3Jinju23°91
- 4Suncheon22°21°91
- 5Daegu22°90
- 6Gwangju22°90
- 7Changwon22°22°90
- 8Mokpo22°19°90
- 9CheonanThis page21°89
Places nearby
Near Cheonan
Other destinations close by.
Places with a similar climate
Places with a climate like Cheonan
Destinations whose weather through the year is closest to Cheonan's – good alternatives.
Frequently asked questions about Cheonan
When is the best time to visit Cheonan?
The best time to visit Cheonan is from April to June and from September to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Cheonan?
August is the warmest month, with average highs of 31 °C and nights around 22 °C. January is the coolest month at 4 °C.
When does it rain most in Cheonan?
Rain is frequent from July to August; the wettest month is July with 270 mm. The driest month is January with 21 mm.
How many hours of sunshine does Cheonan get?
Cheonan gets around 2,270 hours of sunshine a year. The sunniest month is May with 7.8 hours a day; in December there are 5.0 hours a day.
What time zone is Cheonan in?
Cheonan is on UTC+9 all year.
How long is the flight from London to Cheonan?
A nonstop flight from London to Cheonan takes about 11 h 15 min, for a straight-line distance of about 8,960 km.
When is typhoon season in Cheonan?
Cheonan lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for Cheonan?
Cheonan has its best school-holiday weather during October half-term (score 89) and its weakest during the Christmas holidays (score 36). Holiday ratings (0–100): Easter holidays 79, May half-term 87, summer holidays 43, October half-term 89, Christmas holidays 36.