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Monthly climate in Hongseong, South Korea

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Hongseong features a humid subtropical climate (Cfa). Temperatures typically range between -1 °C (31 °F) and 27 °C (81 °F) through the year, but rarely can drop to -17 °C (1 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 1115 mm (43.9 inches) and receives 94 rainy days on the 1 mm (0.04 inches) threshold annually. Hongseong enjoys an average of 3194 hours of sunshine throughout the year, and daylight varies from 9 hours 41 minutes to 14 hours 36 minutes per day.

Monthly average temperatures in Hongseong, South Korea

The warmest months in Hongseong are June, July and August, 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 1 °C (31 - 35 °F) throughout the day. On average each year, Hongseong experiences 99 days above 25 °C (77.0 °F) and 82 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hongseong. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(56°F)		18°C
(65°F)		22°C
(72°F)		28°C
(83°F)		30°C
(86°F)		33°C
(91°F)		36°C
(97°F)		38°C
(101°F)		32°C
(90°F)		28°C
(84°F)		22°C
(71°F)		16°C
(60°F)
Mean maximum11°C
(52°F)		14°C
(57°F)		20°C
(68°F)		26°C
(80°F)		29°C
(84°F)		31°C
(89°F)		34°C
(94°F)		35°C
(96°F)		30°C
(86°F)		26°C
(80°F)		20°C
(69°F)		13°C
(56°F)
Average high4°C
(39°F)		6°C
(43°F)		13°C
(55°F)		18°C
(65°F)		23°C
(74°F)		27°C
(81°F)		30°C
(85°F)		31°C
(87°F)		26°C
(79°F)		20°C
(69°F)		14°C
(57°F)		6°C
(42°F)
Daily mean-1°C
(31°F)		1°C
(34°F)		7°C
(45°F)		13°C
(55°F)		18°C
(64°F)		22°C
(72°F)		26°C
(79°F)		27°C
(81°F)		22°C
(71°F)		15°C
(59°F)		8°C
(47°F)		1°C
(35°F)
Average low-5°C
(24°F)		-3°C
(26°F)		2°C
(36°F)		7°C
(45°F)		13°C
(55°F)		18°C
(64°F)		23°C
(73°F)		24°C
(75°F)		18°C
(64°F)		11°C
(51°F)		4°C
(39°F)		-2°C
(28°F)
Mean minimum-12°C
(12°F)		-9°C
(16°F)		-3°C
(26°F)		0°C
(33°F)		7°C
(45°F)		13°C
(56°F)		19°C
(67°F)		20°C
(67°F)		11°C
(53°F)		3°C
(38°F)		-3°C
(27°F)		-9°C
(16°F)
Minimum-17°C
(1°F)		-12°C
(10°F)		-6°C
(22°F)		-2°C
(29°F)		5°C
(40°F)		12°C
(54°F)		18°C
(65°F)		18°C
(64°F)		10°C
(49°F)		1°C
(34°F)		-4°C
(25°F)		-10°C
(14°F)

Compare climate in Hongseong with other places

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

Monthly average precipitation in Hongseong, South Korea

Hongseong usually has the most precipitation in July, August and September, with an average of 13 rainy days and 209 mm (8.2 inches) of precipitation per month. The driest months in Hongseong are January, February and December. On average, 27 mm (1.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hongseong. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)22 (0.9)30 (1.2)59 (2.3)60 (2.3)83 (3.3)89 (3.5)233 (9.2)238 (9.4)158 (6.2)68 (2.7)45 (1.8)31 (1.2)
Average precipitation days (≥ 1 mm)455789151610555

Monthly sunshine hours in Hongseong, South Korea

The sunniest months in Hongseong are May, June and August, when the sun shines an average of 10 hours 1 minutes a day. Least sunny months in Hongseong: January, November and December receive an average of 7 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hongseong. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours190238281290314316289290257267229228
Mean daily daylight hours9h 57m10h 50m11h 57m13h 7m14h 6m14h 36m14h 21m13h 29m12h 23m11h 13m10h 12m9h 41m

Solar UV radiation in Hongseong, South Korea

Hongseong experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 11, 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 Hongseong UV Index data.

Average daily maximum UV levels by month for Hongseong. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)356991111119753