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Monthly climate in Seonghwan, South Korea

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Seonghwan features a humid continental climate (Dwa). Temperatures typically range between -2 °C (29 °F) and 27 °C (80 °F) through the year, but rarely can drop to -20 °C (-4 °F) or can rise to as high as 39 °C (102 °F). The average annual precipitation amounts to about 1149 mm (45.3 inches) and receives 91 rainy days on the 1 mm (0.04 inches) threshold annually. Seonghwan enjoys an average of 3156 hours of sunshine throughout the year, and daylight varies from 9 hours 39 minutes to 14 hours 38 minutes per day.

Monthly average temperatures in Seonghwan, South Korea

The warmest months in Seonghwan are June, July and August, with daily mean temperatures ranging from 23 to 27 °C (73 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 0 °C (29 - 33 °F) throughout the day. On average each year, Seonghwan experiences 105 days above 25 °C (77.0 °F) and 93 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Seonghwan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(55°F)		20°C
(68°F)		23°C
(73°F)		29°C
(84°F)		33°C
(93°F)		34°C
(94°F)		36°C
(97°F)		39°C
(102°F)		31°C
(88°F)		29°C
(85°F)		21°C
(70°F)		14°C
(57°F)
Mean maximum10°C
(51°F)		14°C
(57°F)		20°C
(68°F)		27°C
(81°F)		31°C
(88°F)		32°C
(90°F)		34°C
(94°F)		36°C
(96°F)		30°C
(85°F)		27°C
(80°F)		20°C
(68°F)		12°C
(54°F)
Average high3°C
(38°F)		6°C
(42°F)		13°C
(56°F)		19°C
(66°F)		24°C
(76°F)		28°C
(83°F)		30°C
(86°F)		30°C
(87°F)		26°C
(79°F)		20°C
(68°F)		13°C
(56°F)		5°C
(41°F)
Daily mean-2°C
(29°F)		0°C
(33°F)		7°C
(45°F)		13°C
(55°F)		18°C
(65°F)		23°C
(73°F)		26°C
(79°F)		27°C
(80°F)		21°C
(70°F)		14°C
(58°F)		7°C
(45°F)		0°C
(32°F)
Average low-6°C
(21°F)		-4°C
(25°F)		2°C
(35°F)		7°C
(44°F)		12°C
(55°F)		18°C
(64°F)		22°C
(73°F)		23°C
(74°F)		17°C
(63°F)		10°C
(50°F)		2°C
(37°F)		-4°C
(25°F)
Mean minimum-14°C
(8°F)		-10°C
(13°F)		-4°C
(25°F)		0°C
(33°F)		6°C
(44°F)		13°C
(56°F)		19°C
(66°F)		19°C
(66°F)		12°C
(53°F)		2°C
(35°F)		-4°C
(26°F)		-12°C
(11°F)
Minimum-20°C
(-4°F)		-14°C
(7°F)		-7°C
(21°F)		-2°C
(28°F)		4°C
(40°F)		12°C
(53°F)		18°C
(64°F)		16°C
(61°F)		9°C
(48°F)		1°C
(33°F)		-5°C
(23°F)		-14°C
(7°F)

Compare climate in Seonghwan with other places

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

Monthly average precipitation in Seonghwan, South Korea

Seonghwan usually has the most precipitation in July, August and September, with an average of 13 rainy days and 218 mm (8.6 inches) of precipitation per month. The driest months in Seonghwan are January, February and December. On average, 26 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Seonghwan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)23 (0.9)28 (1.1)58 (2.3)67 (2.7)95 (3.7)83 (3.3)252 (9.9)253 (10.0)148 (5.8)64 (2.5)51 (2.0)27 (1.0)
Average precipitation days (≥ 1 mm)345697151610655

Monthly sunshine hours in Seonghwan, South Korea

The sunniest months in Seonghwan are April, May and June, when the sun shines an average of 9 hours 55 minutes a day. Least sunny months in Seonghwan: January, November and December receive an average of 7 hours 11 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Seonghwan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours197239277283308311281276255260229234
Mean daily daylight hours9h 55m10h 48m11h 57m13h 8m14h 8m14h 38m14h 23m13h 31m12h 23m11h 12m10h 11m9h 39m

Solar UV radiation in Seonghwan, South Korea

Seonghwan experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / 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 4. For more detailed information, check out our hourly Seonghwan UV Index data.

Average daily maximum UV levels by month for Seonghwan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346991011119643