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Monthly climate in Yongsan, South Korea

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Yongsan features a humid continental climate (Dwa). Temperatures typically range between -1 °C (30 °F) and 26 °C (79 °F) through the year, but rarely can drop to -20 °C (-4 °F) or can rise to as high as 38 °C (100 °F). The average annual precipitation amounts to about 1138 mm (44.8 inches) and receives 94 rainy days on the 1 mm (0.04 inches) threshold annually. Yongsan enjoys an average of 3094 hours of sunshine throughout the year, and daylight varies from 9 hours 43 minutes to 14 hours 34 minutes per day.

Monthly average temperatures in Yongsan, South Korea

The warmest months in Yongsan are June, July and August, with daily mean temperatures ranging from 22 to 26 °C (73 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 1 °C (30 - 34 °F) throughout the day. On average each year, Yongsan experiences 96 days above 25 °C (77.0 °F) and 86 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Yongsan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(55°F)		22°C
(71°F)		24°C
(75°F)		29°C
(85°F)		31°C
(89°F)		34°C
(94°F)		36°C
(98°F)		38°C
(100°F)		30°C
(87°F)		31°C
(88°F)		21°C
(70°F)		15°C
(59°F)
Mean maximum11°C
(51°F)		15°C
(59°F)		21°C
(70°F)		27°C
(81°F)		30°C
(86°F)		32°C
(90°F)		33°C
(92°F)		35°C
(95°F)		29°C
(84°F)		27°C
(81°F)		20°C
(69°F)		13°C
(55°F)
Average high4°C
(39°F)		6°C
(43°F)		13°C
(56°F)		19°C
(66°F)		24°C
(75°F)		27°C
(82°F)		29°C
(84°F)		30°C
(87°F)		25°C
(77°F)		20°C
(68°F)		13°C
(56°F)		5°C
(42°F)
Daily mean-1°C
(30°F)		1°C
(34°F)		8°C
(46°F)		13°C
(55°F)		18°C
(65°F)		22°C
(73°F)		25°C
(78°F)		26°C
(79°F)		21°C
(70°F)		14°C
(58°F)		8°C
(46°F)		1°C
(33°F)
Average low-5°C
(23°F)		-4°C
(26°F)		2°C
(36°F)		7°C
(45°F)		13°C
(55°F)		18°C
(64°F)		22°C
(72°F)		23°C
(73°F)		17°C
(63°F)		10°C
(50°F)		3°C
(37°F)		-3°C
(26°F)
Mean minimum-13°C
(9°F)		-11°C
(13°F)		-4°C
(26°F)		1°C
(33°F)		6°C
(44°F)		13°C
(56°F)		18°C
(65°F)		18°C
(65°F)		11°C
(53°F)		2°C
(36°F)		-3°C
(27°F)		-11°C
(12°F)
Minimum-20°C
(-4°F)		-15°C
(5°F)		-5°C
(23°F)		-1°C
(30°F)		4°C
(40°F)		11°C
(52°F)		17°C
(62°F)		16°C
(60°F)		10°C
(50°F)		-0°C
(32°F)		-5°C
(23°F)		-13°C
(8°F)

Compare climate in Yongsan with other places

Compare temperature, precipitation, sunshine, UV index in Yongsan, South Korea with other places around the world.

Monthly average precipitation in Yongsan, South Korea

Yongsan usually has the most precipitation in July, August and September, with an average of 14 rainy days and 211 mm (8.3 inches) of precipitation per month. The driest months in Yongsan are January, November and December. On average, 27 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Yongsan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)25 (1.0)34 (1.3)65 (2.5)69 (2.7)82 (3.2)102 (4.0)222 (8.8)229 (9.0)182 (7.2)73 (2.9)31 (1.2)24 (1.0)
Average precipitation days (≥ 1 mm)448688161610653

Monthly sunshine hours in Yongsan, South Korea

The sunniest months in Yongsan are April, May and June, when the sun shines an average of 9 hours 42 minutes a day. Least sunny months in Yongsan: January, November and December receive an average of 7 hours 9 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Yongsan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours193236275279303300265273243258228236
Mean daily daylight hours9h 58m10h 50m11h 57m13h 7m14h 5m14h 34m14h 19m13h 28m12h 22m11h 14m10h 14m9h 43m

Solar UV radiation in Yongsan, South Korea

Yongsan experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure. January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Yongsan UV Index data.

Average daily maximum UV levels by month for Yongsan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)3579911111210753