Weather in Osan

Stay up to date with weather conditions in the city of Osan. Below you will find current data, detailed forecasts, and useful charts to help plan your journey.

The climate of Osan can be described as temperate with four distinct seasons. The weather here shifts from freezing and dry in winter to hot and humid in summer, which is typical for this part of the country. Travelers should consider significant seasonal contrasts when planning their trip.

Summer in Osan is a period of warmth and high humidity. July and August are the hottest months with an average temperature of around +26°C, accompanied by a high number of cloudy and rainy days (up to 17 days per month). Winter, conversely, brings cold weather, with average temperatures dropping slightly below freezing, yet precipitation is minimal, and days are often clear.

The most favourable times for tourism are considered to be spring and autumn. During these transitional periods, comfortable weather sets in: in spring, the air gradually warms from +7°C in March to +17°C in May, and in autumn, the summer heat subsides, giving way to pleasant coolness. Precipitation is moderate during this time, which is excellent for outdoor walks and sightseeing.

The climate in this region is distinguished by pronounced seasonality, offering tourists vastly different conditions depending on the time of year. Osan greets winter with frosty weather: January is usually the coldest month with an average temperature of around -1.5°C. During this time, night frosts can reach -5.6°C, so high-quality warm clothing is essential for staying outdoors comfortably. February and December also remain quite cold, maintaining the city's winter atmosphere.

Summer, on the other hand, is characterized by high temperatures. The hottest period is August, when average figures stay at the level of +26.2°C, and during the day, the air often warms up to nearly +30°C. July is practically on par in terms of temperature, creating conditions for true summer heat. Spring and autumn serve as transitional periods with pleasant but variable warmth, when the nature of South Korea is particularly beautiful.

When planning trips during the off-season, it is important to take into account noticeable daily temperature fluctuations. This is especially evident in spring and autumn: for example, in April or October, the difference between the cool of the night and the warmth of the day is often about 10 degrees. It may be fresh in the morning (around +7°C...+10°C), while by lunchtime it becomes summery warm, so travelers are recommended to dress in layers to feel comfortable throughout the day.

Precipitation in the city of Osan is distributed unevenly throughout the year, which is characteristic of the region's climate with its pronounced seasonality. The driest period falls on the winter months when humidity levels are minimal, while the wettest season arrives in mid-summer.

Summer, especially July and August, brings the highest amount of rainfall. It rains very frequently during these months: statistics show up to 17 rainy days per month. Travelers planning a trip at this time should definitely take an umbrella or a raincoat, as precipitation can be a frequent companion to warm days.

Winter, conversely, is distinguished by the least amount of moisture. From December to February, minimal precipitation falls, and considering the sub-zero temperatures (averaging down to -1.5°C in January), it often comes in the form of snow. Spring and autumn are transitional periods with a moderate number of inclement days, making them quite comfortable for excursions.

When packing for Osan, it is important to consider the distinct seasonality of the local climate to ensure comfort in any weather. Winters here are frosty and dry, with temperatures often dropping below freezing, so your suitcase must contain warm thermal underwear, a windproof down jacket, a hat, a scarf, and gloves. Spring and autumn, conversely, delight with moderate warmth, yet significant temperature changes throughout the day are characteristic of these seasons. The best solution is the layering principle: a combination of a t-shirt, a jumper, and a light jacket will allow you to quickly adapt to weather changes from morning to evening.

Summer in the region is hot and humid, especially July and August, which see the peak of the rainy season with frequent and heavy rainfall. For a summer trip, choose clothing made from light natural fabrics that dry quickly, and be sure to bring a reliable umbrella, a quality raincoat, and perhaps a spare pair of shoes. Despite high humidity and cloud cover, the sun remains active, so sunscreen, sunglasses, and a head covering will be relevant even on cloudy days.

Regardless of the time of year, pay special attention to footwear: it should be maximally comfortable, broken-in, and suitable for long walks through city streets and parks. If you are planning a trip in the off-season, do not forget a windbreaker, as spring and autumn winds can be quite cool. A well-chosen wardrobe will allow you not to be distracted by nature's whims and fully focus on exploring the culture of South Korea.