Ulsan, officially the Ulsan Metropolitan City, is Korea's eighth largest metropolis with a population of over 1.1 million. It is located in the south-east of the country, neighboring Busan to the south and facing Gyeongju to the north.
Ulsan is bounded on the east by the East Sea. Busan is 70 km to the south.
Ulsan has a monsoon-influenced humid subtropical climate (Köppen Cfa/Cwa), with somewhat cold but dry winters, and hot, humid summers. Monthly means range from 2.0 °C (35.6 °F) in January to 25.9 °C (78.6 °F) in August, with diurnal temperature ranges generally low. Its location on the Korean peninsula results in a seasonal lag, with the warmest days being in August and averaging very near 30 °C (86 °F). Precipitation is relatively low in the winter months, but is made up by the high rainfall falling from April to September.