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Monthly climate in Koch'ang, South Korea

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Koch'ang features a humid subtropical climate (Cfa). Temperatures typically range between 1 °C (33 °F) and 27 °C (81 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 1187 mm (46.7 inches) and receives 102 rainy days on the 1 mm (0.04 inches) threshold annually. Koch'ang enjoys an average of 3195 hours of sunshine throughout the year, and daylight varies from 9 hours 47 minutes to 14 hours 29 minutes per day.

Monthly average temperatures in Koch'ang, South Korea

The warmest months in Koch'ang are July, August and September, with daily mean temperatures ranging from 22 to 27 °C (72 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 3 °C (33 - 37 °F) throughout the day. On average each year, Koch'ang experiences 92 days above 25 °C (77.0 °F) and 68 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Koch'ang. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum16°C
(62°F)		20°C
(69°F)		22°C
(72°F)		27°C
(81°F)		29°C
(84°F)		32°C
(90°F)		34°C
(93°F)		36°C
(97°F)		31°C
(88°F)		30°C
(85°F)		22°C
(72°F)		18°C
(65°F)
Mean maximum12°C
(53°F)		15°C
(59°F)		20°C
(68°F)		25°C
(77°F)		28°C
(82°F)		30°C
(85°F)		32°C
(91°F)		34°C
(94°F)		30°C
(86°F)		27°C
(80°F)		21°C
(70°F)		14°C
(58°F)
Average high5°C
(41°F)		6°C
(44°F)		13°C
(55°F)		18°C
(64°F)		23°C
(73°F)		26°C
(79°F)		29°C
(84°F)		30°C
(87°F)		26°C
(79°F)		20°C
(69°F)		14°C
(58°F)		7°C
(45°F)
Daily mean1°C
(33°F)		2°C
(36°F)		8°C
(46°F)		13°C
(55°F)		18°C
(64°F)		22°C
(72°F)		26°C
(78°F)		27°C
(81°F)		22°C
(72°F)		16°C
(61°F)		9°C
(49°F)		3°C
(37°F)
Average low-3°C
(27°F)		-2°C
(29°F)		3°C
(37°F)		8°C
(46°F)		13°C
(55°F)		18°C
(65°F)		23°C
(74°F)		24°C
(75°F)		19°C
(66°F)		12°C
(53°F)		5°C
(41°F)		-1°C
(31°F)
Mean minimum-10°C
(14°F)		-8°C
(18°F)		-3°C
(27°F)		1°C
(34°F)		8°C
(46°F)		14°C
(57°F)		20°C
(68°F)		20°C
(69°F)		13°C
(55°F)		5°C
(40°F)		-0°C
(31°F)		-7°C
(19°F)
Minimum-17°C
(2°F)		-11°C
(13°F)		-4°C
(24°F)		-1°C
(31°F)		5°C
(42°F)		13°C
(55°F)		18°C
(64°F)		17°C
(63°F)		12°C
(54°F)		3°C
(38°F)		-2°C
(30°F)		-10°C
(14°F)

Compare climate in Koch'ang with other places

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

Monthly average precipitation in Koch'ang, South Korea

Koch'ang usually has the most precipitation in July, August and September, with an average of 14 rainy days and 218 mm (8.6 inches) of precipitation per month. The driest months in Koch'ang are January, February and December. On average, 31 mm (1.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Koch'ang. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)27 (1.1)31 (1.2)58 (2.3)56 (2.2)85 (3.3)133 (5.2)243 (9.6)199 (7.8)213 (8.4)68 (2.7)38 (1.5)35 (1.4)
Average precipitation days (≥ 1 mm)6576810151612557

Monthly sunshine hours in Koch'ang, South Korea

The sunniest months in Koch'ang are May, June and August, when the sun shines an average of 9 hours 59 minutes a day. Least sunny months in Koch'ang: January, November and December receive an average of 7 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Koch'ang. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours189237279290307312291298255267234230
Mean daily daylight hours10h 2m10h 53m11h 58m13h 5m14h 1m14h 29m14h 15m13h 26m12h 22m11h 15m10h 17m9h 47m

Solar UV radiation in Koch'ang, South Korea

Koch'ang 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 Koch'ang UV Index data.

Average daily maximum UV levels by month for Koch'ang. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)35791011121210753