Climate and monthly weather forecast
Cheongju, South Korea

Situated amid the hill-ridden landscapes of South Korea, Cheongju bears the distinction of a Dwa climate as per the Köppen climate classification, which connotes a humid continental climate, severe dry winter, with a warm summer. Throughout the twelve months, patterns in the weather parameters such as temperature, humidity, rainfall, daylight, sunshine, and UV index demonstrate a certain rise and fall.

The temperature oscillates between the lowest of -6.9°C (19.6°F) in the winter months to a peak of 30.5°C (86.9°F) during the summer. An identifiable pattern can be seen, with temperatures mounting from February reaching its apex in August, and then seeing a steady decline thereafter. On average, the highest recorded humidity in Cheongju is 76.4% during the warmest months of July and August, and falls to a lower end at 56.6% in April.

Rainfall levels show a gradual steady increase from the start of the year, peaking at 285mm (11.22") in August, followed by a rapid decline towards the year end, reaching the lowest at 25mm (0.98") in December. The city experiences rainfall for an average of 8 to 15.9 days in a year, with the rainy day frequency peaking in July and the least recorded in February.

Noticeably, the prime sunshine lasts for 14.6 hours in June which is the highest, slipping down gradually to 9.7 hours in December being the shortest in daylight span. Moreover, summer months are not just warm but also the brightest with the UV index striking the highest at 10 in July compared to its lowest of 2 during the darker months of December and January.

The best period to visit Cheongju largely depends on the individual's preference for a particular kind of weather. However, to bask in a temperate climate, visitors are recommended between April and June. During this period, the daily temperatures range from 6.1°C (43°F) to 24.4°C (75.9°F), a conducive time for outdoor activities. Also, the rainfall varies between 48mm (1.89") and 88mm (3.46"), thus it is not overly humid yet not too dry. The daylight lasts for about 13.1 to 14.1 hours, offering ample hours to explore the city's many attractions.

Visitors might want to avoid extensive travel plans in Cheongju between July and August. During these months, the weather conditions can become rather intense. The city faces its highest temperatures ranging from 27.9°C (82.2°F) to 30.5°C (86.9°F) and the rainfall reaches its peak at around 283mm (11.14") to 285mm (11.22"), resulting in a particularly wet and hot climate. Furthermore, the humidity levels also shoot up to around 76.4% to 76.1%, making the hot weather feel stuffier.

Marking the onset of pleasant weather, spring sets in Cheongju from March to May. Over this period, temperatures show an upward trend, starting at 0.2°C (32.4°F) in March, hitting 11.9°C (53.4°F) in April, and finally reaching 24.4°C (75.9°F) in May. During this season, the city experiences a mixed bag of rainfall varying from 48mm (1.89") to 88mm (3.46"). Pleasant weather, longer daylight hours that vary between 12 hours to 14.1 hours and a moderate UV index of 5 to 8 make the spring a delightful season in Cheongju.

Summer in Cheongju lasts from June to August. The weather during these months tends to be hot and humid with temperatures averaging from 24.4°C (75.9°F) to 30.5°C (86.9°F). The region is at its rainiest during the summer months with the highest rainfall recorded between 144mm (5.67") to 285mm (11.22"). The daylight hours are the longest in June, peaking at 14.6 hours, before gradually dropping to 13.5 hours in August. The UV index remains high in this period ranging from 8 to 10, thus protective gear is advised during outdoor activities.

Autumn in Cheongju spans from September to November. During this season, there is noticeable cooling with temperatures sliding down from 26.3°C (79.3°F) in September to a lower 12.7°C (54.9°F) in November. Rainfall falls back to a more manageable range during this period, varying from 147mm (5.79") in September down to 47mm (1.85") by November. Daylight hours shrink steadily from 12.4 hours in September to 10.2 hours in November. The UV index wanes, averaging between 7 and 3, suggesting the decreasing intensity of sunlight through the season.

Winter sets in Cheongju during December through February. This Season witnesses the lowest recorded temperatures between -6.9°C (19.6°F) to 6°C (42.8°F). The city experiences its least rainfall averaging between 29mm (1.14") and 25mm (0.98") during these colder months. The daylight hours are the shortest, varying from 9.7 hours in December to 10.8 hours by February. The UV index hits its lowest at 2 during this time indicating limited sunlight exposure.

The initial month of the year in Cheongju, South Korea experiences relatively cold temperatures. The most chill is felt at night with lows reaching -6.9°C (19.6°F). With the shortest daylight span in the year, individuals often find themselves limiting outdoor activities. Weather in January »

In February, Cheongju undergoes a perceivable shift in seasons. There's an uptick in temperature, rain, and sunshine compared to January. Temperature highs increase to a more agreeable 6°C (42.8°F). Humidity, in contrast, undergoes a slight decrease. Weather in February »

The city welcomes spring in March with warmer weather and extended daylight hours. A substantial increase in rainfall demands the carrying of an umbrella for most outings. Compared to the previous month, temperature lows spike up to a more comfortable 0.2°C (32.4°F). Weather in March »

April ushers in a new chapter of weather in Cheongju, with higher temperatures and a continued increase in rainfall. This month witnesses a significant rise in temperatures, going up to a daytime peak of 19.5°C (67.1°F). Despite the increase in humidity, city dwellers appreciate the longer days and plentiful sunshine. Weather in April »

May in Cheongju is characterized by the full bloom of summer. The temperature continues to climb, and the city is both warmer and wetter than any previous month. This month sees a remarkable surge in rainfall to reach a peak of 88mm (3.46"). Weather in May »

June introduces the onset of summer monsoons in Cheongju, with high humidity and a boom in rain showers. Despite the diminished sunshine hours as compared to May, the city experiences the year's highest temperatures. Compared to May, temperature lows rise dramatically to 17.6°C (63.7°F). Weather in June »

In July, Cheongju experiences a weather extreme with the year's highest temperatures and rainfall. This month witnesses the hottest temperatures with highs hitting 29.8°C (85.6°F). Despite this heat, the city's residents brave through thanks to the longest daylight hours and abundant rainfall of the year. Weather in July »

With no notable change from the previous month, August in Cheongju is characterized by high temperatures and excessive rainfall. This month records marginally the hottest temperatures of the year, reaching a high of 30.5°C (86.9°F). Weather in August »

September signals a shift in seasons with a significant decrease in temperature, rainfall, and humidity. Temperature highs decline to 26.3°C (79.3°F), easing the excessive summer heat. Akin to a curtain call, this month welcomes shorter daylight hours and diminishing rainfall. Weather in September »

October ushers in autumn completely, with a continual drop in temperature, rainfall, and humidity. An impressive decrease in rainfall brings the monthly downpour to nearly a third of September's total. The city's weather becomes dryer and cooler, with temperature highs dropping to a comfortable 20.7°C (69.3°F). Weather in October »

November is a transitional period for the weather in Cheongju, preparing to welcome the frosty winter. There is a noticeable decrease in temperature, rainfall, and daylight hours from October. The city experiences chilly nights with temperature lows averaging 1.7°C (35.1°F). Weather in November »

December plunges Cheongju into the depths of winter with a sharp drop in temperatures and a restrained rainfall pattern. The chill intensifies as the year concludes, with temperatures falling to a numbing low of -4.3°C (24.3°F). Weather in December »