Climate and monthly weather forecast
Geoje, South Korea

Geoje, South Korea, lies within the Humid subtropical region, designated as a Cfa zone according to the Köppen climate classification. The overall weather pattern of this island, positioned off the southern coast of the Korean Peninsula, is generally moderate, brimming with frequent rainfall, especially in the summer months, relatively high humidity throughout the year, and temperatures ranging from -1.6°C (29.1°F) in the colder months to 29.4°C (84.9°F) in the peak of summer.

The temperature fluctuates moderately between summer and winter, with a notable contrast being observed. In particular, temperatures peak at 29.4°C (84.9°F) in August and dip to -1.6°C (29.1°F) in January. Meanwhile, the relative humidity varies between 53.4% in February to a high of 78.1% in July. With regard to precipitation, the heaviest rainfall is in July with 426mm (16.77"), while the least falls in December with 30mm (1.18"). The amount of sunshine Geoje receives varies noticeably across the year, from a low of 4.8 hours in July to a high of 7.5 hours in May and June.

Unique weather patterns arise in Geoje due to its positioning and climactic influences. July is the wettest month, with an average rain of 426mm (16.77") spread over 14.8 days. This monthly rainfall is significantly higher than in any other month. In contrast, December gets the least amount of 30mm (1.18") over 3.8 days. Regarding temperature variations, January experiences the lowest while August witnesses the highest.

When looking at the moderate fluctuations in temperature, humidity, rainfall, daylight, and sunshine, the ideal period to visit Geoje is from late spring to early summer. During this time, the temperatures hover around a comfortable 18.3°C (64.9°F) to 22.6°C (72.7°F) from April to June. Humidity remains relatively low, ranging from 59% to 65.2%. Rainfall during these months is moderate, particularly in June, ensuring a pleasant and enjoyable outdoor experience. Daily sunshine hours are also at their peak, with an average of 7.5 hours, allowing visitors ample time to enjoy the natural beauty of Geoje.

The period from late summer to early autumn, particularly July to August, is typically the least favorable time to visit Geoje. Humidity surges to overwhelming levels, exceeding 70% and peaking at 78.1% in July, making outdoor activities somewhat uncomfortable. Combined with temperatures reaching as high as 29.4°C (84.9°F) in August, these conditions can be oppressive. Moreover, this period sees the most significant rainfall, with July emerging as the wettest month with a massive 426mm (16.77") over nearly 15 days, significantly limiting outdoor exploration opportunities.

Spring in Geoje, ranging from March to May, is marked by a gradual warming and increasing rainfall. The average temperatures climb from a cool 13.2°C (55.8°F) in March to a warm 22.6°C (72.7°F) in May. Concurrently, rainfall increases from 114mm (4.49") to 235mm (9.25"). The relatively lower humidity levels of 56.5% to 65.2%, coupled with rising daylight hours from 12 to 14, contribute to overall favourable conditions for sightseeing and other outdoor activities.

Geoje's summer from June to August is characterized by soaring temperatures and increasing humidity. Temperatures can reach the season's peak of 29.4°C (84.9°F) in August, while relative humidity levels rise from 71.7% in June to an all-time high of 78.1% in July. The summer rainfall is particularly heavy, peaking at an impressive 426mm (16.77") in July. These conditions, coupled with shorter sunshine hours dropping to a yearly low of 4.8 hours in July, make this season challenging for outdoor adventures.

Autumn, occurring from September to November, witnesses a swift decline in temperatures and rainfall in Geoje. The average temperatures shift from a warm 26.4°C (79.5°F) in September to a colder 15.4°C (59.7°F) in November. Rainfall reduces drastically from 201mm (7.91") in September to 55mm (2.17") in November. With decreasing humidity from 70.9% to 61.2% and longer sunshine hours of up to 6.7 in November, this period offers a pleasant respite from the summer excesses, making it a fine time for travel.

Winters in Geoje, spanning December to February, are marked by cooler temperatures and significantly lower rainfall. The average temperature hovers around 9.7°C (49.5°F) in December and drops to the yearly low of -1.6°C (29.1°F) in January. Meanwhile, the precipitation levels fall considerably, making December the driest month with just 30mm (1.18") rainfall over 3.8 days. Despite the chill, the lower humidity levels ranging between 53.6% to 55.4% and steady sunshine hours make winter quite bearable.

January's weather reveals a cold and dry setting for Geoje, South Korea, making it the coldest month of the year. High temperatures hover around 7.3°C (45.1°F), while lows can plunge to a frigid -1.6°C (29.1°F). It's worth bringing out heavy winter clothing and enjoying winter activities if possible, as daylight extends 10.1 hours. Weather in January »

Geoje's weather slightly warms in February, with the mercury inching up compared to January. Temperatures climb to a high of 9.4°C (48.9°F). A great part of this month presents without rainfall as precipitation moderately increases to 60mm (2.36") over 5.3 days. Weather in February »

Approaching the vernal equinox, March sees an embrace of warmer temperatures and more sunlight in Geoje. Transitioning from winter to spring, temperatures rise generously to 13.2°C (55.8°F). Roads may be slick as rainfall spikes to 114mm (4.49") over 7.5 days, signalling the onset of a wet spring season. Weather in March »

April's weather conditions shift dramatically with rising temperatures and longer daylight hours, indicative of Geoje transitioning fully into the spring season. On average, the temperatures significantly rise from 13.2°C (55.8°F) to 18.3°C (64.9°F). Weather in April »

May advances with the onset of summer, characterized by warmer temperatures and high humidity levels in Geoje. It's one of the rainiest months of the year, upping the ante with 235mm (9.25") of rainfall. Despite the rain, outdoor plans remain feasible as daylight peaks at 14 hours. Weather in May »

June in Geoje flags the true arrival of summer with heightened temperatures, maximum daylight, and increased rainfall. The highest temperature scales to 25.5°C (77.9°F), granting residents and visitors a genuine summer feel. However, the surge in rainfall levels to 270mm (10.63") over 11.1 days calls for a careful watch over outdoor activities. Weather in June »

July sees the hottest time of the year, with the sun reaching its zenith and creating sultry weather conditions in Geoje. The mercury notches further, hitting an average peak of 27.6°C (81.7°F). In sync with the high temperature, rainfall swells, recording 426mm (16.77") spread over 14.8 days of rain. Weather in July »

Geoje's August weather strikes a balance between the ambient July heat and the upcoming mild September, laying out a distinctive spectrum of weather variables. Despite being the second hottest month, temperatures top at a moderately scorching 29.4°C (84.9°F). Weather in August »

September in Geoje showcases the onset of the mild and pleasant autumn season, shedding the intense heat and humidity of August. Complementing the ongoing transformation in climate, rainfall reduces to 201mm (7.91"). The significant reduction in temperature provides a refreshing reprieve from the sweltering summer heat. Weather in September »

October's weather shifts Geoje into full autumn mode, accompanied by a dip in temperatures, reduced rainfall, and decreased humidity. The serene fall weather is significantly colder as high temperatures drop to 21.9°C (71.4°F). Weather in October »

Geoje's November weather intensifies the chill in the air as it pedals closer to the invariably cold winters. As the chill creeps in, temperatures further sink, dropping to an average of 15.4°C (59.7°F). Along with it, rainfall descends gradually to 55mm (2.17") occurring over 5.4 days. Weather in November »

December sends Geoje back to the embrace of winter, recording a major drop in temperatures compared to November. The end of the year chronicles a palpable plunge in temperature, sinking to a chilly 9.7°C (49.5°F). Rainfall trickles to 30mm (1.18") over 3.8 days, paving the way for a drier winter landscape. Weather in December »