The climate of Jeju
Jeju, an island city in
South Korea, imbibes climatic conditions typical of a humid subtropical region with no dry season. This rearranges itself into a Köppen climate classification of Cfa, sealing its reputation as a city where temperatures differ widely throughout the year. Geographically, Jeju graces the Korea Strait’s waters, taking in the effects of the sea's close proximity.
Monthly averages of climatological data precisely reveal these wide differences. The maximum temperature in Jeju sporadically fluctuates around the year, springing from a palatable 8.3°C (46.9°F) in
January to its highest veil of 29.8°C (85.6°F) in
July. The journey from cool to a sweltering climate unveils itself in an exciting zig-zag pattern. The minimum temperatures follow the same route, starting from 3.2°C (37.8°F) in January and peaking at 24.3°C (75.7°F) in
August.
The pattern of humidity reveals a unique trend. Starting from display of 65.3% relative humidity in January, it scales up to a maximum of 78.3% in July before winding down back to 65.1% in
December. The mini-climaxes in humidity levels around mid-year are sporadically followed by descents, making the humidity range inconsistent and fascinating at the same time.
While analysing the rainfall data, a noticeable pattern surfaces. The absence of a dry season reflects in the consistent presence of rainfall throughout the year. The data exposes two peaks - the first one in July with a massive 240mm (9.45") and dares to challenge itself with a second, more pronounced peak of 263mm (10.35") in August. This pattern synchronises harmoniously with the increased level of humidity during these months.
Even the number of daylight hovers unassumingly from a low of 10 hours in January to a high of 14.4 hours in
June. A sharp descent follows, tapering off at 10 hours again by December. The pattern of viewing hours apes that of the number of daylight hours, reaching a maximum of 6.5 hours in
April.
These unique weather changes underline the distinct features and characteristics of Jeju's climatic cycle, converting it into a weather enthusiast's paradise.
The best time to visit Jeju
The optimal time to visit
Jeju seems to be between
April and
June. This period microscopically experiences relative temperatures from a high point of 17.5°C (63.5°F) to 24.8°C (76.6°F) and from a lower range of 10.2°C (50.4°F) to 18.7°C (65.7°F). The humidity stays within manageable bands, and the rainfall, though present, is less pronounced. Notably, the daylight goes beyond the 13-hour mark during this period, wrapping up to 14.4 hours in June. Sunshine hours peak at a phenomenal 6.8 hours a day on average in
May, ensuring that visitors can enjoy outdoor activities.
The worst time to visit Jeju
It appears that
July and
August form the least hospitable part of the year to visit
Jeju. This time intuitively coincides with the maximum temperature crossing the 29°C (84.2°F) mark. Humidity levels hike up to 78.3% in July and 76.5% in August. Rainfall records its annual peaks, with a high of 240mm (9.45") in July and reaching its zenith in August at 263mm (10.35"). The frequent rainfall and high humidity contribute to a muggy climate, discouraging numerous outdoor activities.
Spring weather in Jeju
Spring dancingly glides into
Jeju from
March to
May. Here, temperature patterns tiptoe their ascent, with highs escalating from 12.8°C (55°F) to 21.6°C (70.9°F) and lows from 6.1°C (43°F) to 14.4°C (57.9°F). While rainfall preserves its consistent presence, the amount stays within the manageable region of 89mm (3.5") to 96mm (3.78"). The daylight hours lace up to 13 hours a day, peaking at 13.9 hours in May.
Summer weather in Jeju
Summer, sweeping in from
June to
August, introduces sweltering temperatures and heavy rainfall into
Jeju's climate pattern. The hotter climate nudges temperature highs to the 29°C (84.2°F) mark and the lows to above 23°C (73.4°F). Rainfall joyously bounces from 181mm (7.13") in June to a whopping 263mm (10.35") in August. The daylight hours, ironically, start their downward journey, reducing from 14.4 hours to 13.4 hours towards the end of the summer.
Autumn weather in Jeju
Autumn, occupying
September to
November, witnesses a gradual calming down of temperatures. High temperatures organically reduce from 25.8°C (78.4°F) to 16°C (60.8°F), and the minimums decline from 20.4°C (68.7°F) to 9.8°C (49.6°F). Rainfall amounts follow the same path, with a substantial decrease from 222mm (8.74") in September, downsizing to 62mm (2.44") in November. The daylight hours shrink, starting at 12.4 hours in September and gradually waning to 10.4 hours in November.
Winter weather in Jeju
Winter weaves itself around
Jeju from
December to
February. This period eerily resonates with a marked reduction in temperatures. The highs suffer to the 9°C (48.2°F) level, and the lows dig down to the 3°C (37.4°F) to 5°C (41°F) region. Rainfall stays within comfort at around 50mm (1.97") to 60mm (2.36") range, while the daylight hours shorten to around 10 hours a day. Winter even shrouds the island's sunshine, limiting it to less than 3 hours a day on average.
Weather in January
The transition from winter to spring in
Jeju,
South Korea, starts with
January, best known for its chilly temperatures with highs of 8.3°C (46.9°F) and lows dipping to 3.2°C (37.8°F). The month is considered cold, yet precipitation is relatively moderate in the form of scattered showers and possibly snow, keeping the island's vegetation lush.
Weather in January »Weather in February
In
Jeju,
February brings mild but chilly temps despite being slightly warmer than the preceding month. With highs reaching 9.4°C (48.9°F), the island remains cold throughout the month. February holds a charm as the island becomes a host to a plethora of snowdrops, signaling the departure of winter.
Weather in February »Weather in March
March ushers in milder weather, a transition phase between winter and spring in
Jeju. With daily highs reaching 12.8°C (55°F), the month showcases a gradual increase in temperatures as the heavy winter coats start to give way to lighter attire.
Weather in March »
Weather in April
April in
Jeju brings a striking transformation as the island brightens up with temperatures reaching a pleasant high of 17.5°C (63.5°F). Spreading warmth across the island, April showcases a spring at its peak with all things beautiful proliferating around.
Weather in April » Weather in May
May in
Jeju witnesses a marked advancement of spring, turning into early summer with highs around 21.6°C (70.9°F). The month signifies a warmth that permeates not just the weather but also the island's vibrant life. Sights of emerald-green tea fields and lush vegetation dominate, symbolizing the island in full bloom.
Weather in May » Weather in June
June in
Jeju marks the onset of summer, with temperatures soaring up to 24.8°C (76.6°F). The month sees a perceptible change in the island's ambiance, notably with longer daylight hours. As the ocean gets warmer, the beach season officially commences, attracting swimmers, surfers, and sunbathers.
Weather in June »
Weather in July
With temperatures peaking to 29°C (84.2°F),
July is the hottest month in
Jeju, marking the zenith of summer. The abundant sunshine illuminates the crystal-clear waters surrounding the island, their warmth inviting for various water activities.
Weather in July »Weather in August
August continues the narrative of a warm, wet summer in
Jeju. With the mercury hitting a high of 29.8°C (85.6°F), the weather remains hot but slightly less severe than
July. As sea temperatures rise, opportunities for snorkeling, diving, and swimming multiply, adding to Jeju's summer euphoria.
Weather in August » Weather in September
The tingling heat of summer begins to wane in
September in
Jeju, with temps peaking at 25.8°C (78.4°F). As the month progresses, the searing heat gives way to milder conditions, setting in a pre-autumn ambiance. While the beginning of September still retains the summer vibrancy, the latter half witnesses the autumnal transformation of the verdant landscapes into stunning palettes of yellow and orange.
Weather in September »
Weather in October
October manifests the quintessential autumn in
Jeju and comes with a noticeable drop in temperatures, which offer relief after the sweltering summer months. The month brings a refreshing feel, a blend of mild sunny days and nippy evenings.
Weather in October » Weather in November
November signals the onset of winter in
Jeju as temperatures drop further, recording highs of only 16°C (60.8°F). With the majority of foliage shed, the landscapes take on a different aura, alluding to the approaching cold season.
Weather in November » Weather in December
December comes with freezing winds and cold weather, registering lows of 5.3°C (41.5°F) in
Jeju. Marking the peak of winter, snowfall periodically blankets the island, turning it into a striking white canvas. The usual hustle of outdoor activities slows down, shifting focus to indoor engagements and hot springs.
Weather in December » [Resources]