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Monthly climate in Yeosu, South Korea

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Yeosu features a humid subtropical climate (Cwa). Temperatures typically range between 4 °C (39 °F) and 27 °C (81 °F) through the year, but rarely can drop to -8 °C (18 °F) or can rise to as high as 32 °C (90 °F). The average annual precipitation amounts to about 1476 mm (58.1 inches) and receives 86 rainy days on the 1 mm (0.04 inches) threshold annually. Yeosu enjoys an average of 3179 hours of sunshine throughout the year, and daylight varies from 9 hours 51 minutes to 14 hours 26 minutes per day.

Monthly average temperatures in Yeosu, South Korea

The warmest months in Yeosu are July, August and September, with daily mean temperatures ranging from 23 to 27 °C (74 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 6 °C (39 - 43 °F) throughout the day. On average each year, Yeosu experiences 55 days above 25 °C (77.0 °F) and 22 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Yeosu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(59°F)		14°C
(57°F)		15°C
(60°F)		19°C
(66°F)		25°C
(77°F)		26°C
(80°F)		31°C
(89°F)		32°C
(90°F)		28°C
(83°F)		26°C
(79°F)		20°C
(68°F)		15°C
(60°F)
Mean maximum11°C
(52°F)		12°C
(53°F)		15°C
(58°F)		18°C
(64°F)		23°C
(73°F)		25°C
(77°F)		29°C
(84°F)		31°C
(88°F)		28°C
(82°F)		25°C
(77°F)		19°C
(67°F)		13°C
(56°F)
Average high6°C
(44°F)		7°C
(46°F)		11°C
(53°F)		15°C
(59°F)		19°C
(67°F)		22°C
(73°F)		26°C
(79°F)		28°C
(83°F)		25°C
(77°F)		20°C
(69°F)		15°C
(59°F)		8°C
(47°F)
Daily mean4°C
(39°F)		5°C
(41°F)		9°C
(49°F)		13°C
(56°F)		18°C
(64°F)		21°C
(71°F)		25°C
(77°F)		27°C
(81°F)		23°C
(74°F)		18°C
(65°F)		13°C
(55°F)		6°C
(43°F)
Average low1°C
(35°F)		2°C
(36°F)		7°C
(45°F)		11°C
(53°F)		16°C
(61°F)		20°C
(69°F)		24°C
(75°F)		26°C
(79°F)		22°C
(71°F)		17°C
(62°F)		10°C
(51°F)		4°C
(39°F)
Mean minimum-4°C
(24°F)		-3°C
(27°F)		2°C
(37°F)		7°C
(44°F)		13°C
(55°F)		18°C
(64°F)		21°C
(70°F)		23°C
(74°F)		18°C
(65°F)		10°C
(50°F)		5°C
(41°F)		-3°C
(27°F)
Minimum-8°C
(18°F)		-6°C
(22°F)		0°C
(33°F)		5°C
(42°F)		11°C
(52°F)		17°C
(62°F)		20°C
(69°F)		22°C
(72°F)		17°C
(63°F)		8°C
(46°F)		3°C
(37°F)		-6°C
(22°F)

Compare climate in Yeosu with other places

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

Monthly average precipitation in Yeosu, South Korea

Yeosu usually has the most precipitation in June, July and September, with an average of 11 rainy days and 240 mm (9.5 inches) of precipitation per month. The driest months in Yeosu are January, November and December. On average, 27 mm (1.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Yeosu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)32 (1.3)41 (1.6)92 (3.6)108 (4.3)146 (5.8)188 (7.4)275 (10.8)173 (6.8)259 (10.2)113 (4.5)26 (1.0)23 (0.9)
Average precipitation days (≥ 1 mm)347788131312533

Monthly sunshine hours in Yeosu, South Korea

The sunniest months in Yeosu are May, June and August, when the sun shines an average of 9 hours 51 minutes a day. Least sunny months in Yeosu: January, February and December receive an average of 7 hours 26 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Yeosu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours197239273280306300275299256268241239
Mean daily daylight hours10h 5m10h 54m11h 58m13h 3m13h 58m14h 26m14h 12m13h 24m12h 21m11h 16m10h 20m9h 51m

Solar UV radiation in Yeosu, South Korea

Yeosu 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 Yeosu UV Index data.

Average daily maximum UV levels by month for Yeosu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)45791011121210753