Sejong is surrounded by the two provinces of
South and
North Chungcheong, as well as the metropolitan city of
Daejeon. It is about south from
Seoul. The city covers a total area of approximately 465 square kilometers, composed of urbanized zones, administrative complexes, and expansive
greenbelt areas. Sejong's urban planning follows an environmentally integrated approach, incorporating large-scale green belts, parks, and waterways. Over 50% of its land is reserved for forests, public parks, ecological
wetlands, and pedestrian-friendly zones. Geographically, the area is largely defined by gentle hills, river valleys, and fertile plains, formerly used for agriculture before the city's development. The
Miho River, a tributary of the
Geum River, flows through the city, and is a huge aspect of both the green landscape and the water management network of the region. The topography and layout of the city has effectively been transformed during the development process, with much of the land being manipulated and rearranged to prepare the land for an ecological landscape where built space and green space could co-exist.
Parks Sejong City features multiple parks open to everyone. One of the premier parks is lakeside Sejong Lake Park, located at the heart of Korea's largest artificial lake, which is the size equivalent to 62 soccer fields and has an average water depth of 3 meters. Sejong Lake Park also boasts five artificial islands: Festival Island, which hosts events and cultural festivals; Stage Island, which features Korea's first floating stage; Pool Island, which creates a beach feel in the city; Water Flower Island, and Marsh Island with aquatic vegetation and an ecological marshland. In terms of recreation, there is a walking/running track and a dedicated bike lane that surrounds the lake, giving citizens someplace outdoor to walk, bike, and relax. Bear Tree Park is a nature and wildlife park covering a total space of about 100,000 square meters in Sejong City, Korea. The park features around 1,000 species of flowers and trees, providing visitors with a wide selection of natural beauty and wild flowers along with art sculptures out of original materials. This collection of nature and attractions is very appealing to families and tourists with the combination of nature and the structured content of the park.
Asiatic Black Bear Hill houses approximately 150 Asiatic black bears, which are the mascot of the park, and provides a permanent exhibit of the park's featured animal. There is a Pet Zoo in the park, allowing visitors to see animals up close, such as peacocks and spotted deer. The park area also has an Arboretum displaying themed areas, including areas to see rare plants and animals as well as cared for flower and trees.
Climate Sejong City has a
humid continental climate (
Köppen:
Dwa), typical of central inland regions of the
Korean Peninsula, but can be considered a borderline
humid subtropical climate (
Köppen:
Cwa) using the isotherm. Winters are cold and dry, with January being the coldest month, averaging −2.7°C (27.1°F) in daily mean temperature and a mean minimum of −7.8°C (18.0°F). Snowfall is possible but typically light, and
precipitation is low, with only 22.6 mm on average in January. Spring brings gradual warming: average daily temperatures rise from 5.5°C (41.9°F) in March to 17.4°C (63.3°F) in May. Rainfall also increases, with May receiving 86.5 mm (3.41 in) of precipitation over an average of 6.9 days. Summers are hot and rainy due to the
East Asian monsoon. July is the warmest and wettest month, with a daily mean temperature of 25.4°C (77.7°F) and average precipitation of 284.9 mm (11.22 in). August follows closely with 260.3 mm of rain, making these two months responsible for nearly half of the city's annual rainfall. Autumn is cooler and drier, with September averaging 19.8°C (67.6°F) and rainfall dropping to 141.2 mm, then further declining to 58.4 mm in October. Sejong receives about 1,204.9 mm (47.44 in) of precipitation annually, spread over 90.3 days with measurable rainfall. {{Weather box ==Administrative divisions==