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Monthly climate in Ganghwa-gun, South Korea

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ganghwa-gun features a humid continental climate (Dwa). Temperatures typically range between -2 °C (29 °F) and 26 °C (80 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 36 °C (98 °F). The average annual precipitation amounts to about 1022 mm (40.2 inches) and receives 83 rainy days on the 1 mm (0.04 inches) threshold annually. Ganghwa-gun enjoys an average of 3236 hours of sunshine throughout the year, and daylight varies from 9 hours 35 minutes to 14 hours 42 minutes per day.

Monthly average temperatures in Ganghwa-gun, South Korea

The warmest months in Ganghwa-gun are July, August and September, with daily mean temperatures ranging from 22 to 26 °C (72 - 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 - 32 °F) throughout the day. On average each year, Ganghwa-gun experiences 85 days above 25 °C (77.0 °F) and 87 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ganghwa-gun. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum11°C
(53°F)		14°C
(57°F)		18°C
(65°F)		25°C
(78°F)		28°C
(83°F)		33°C
(92°F)		35°C
(96°F)		36°C
(98°F)		30°C
(86°F)		28°C
(83°F)		20°C
(69°F)		12°C
(54°F)
Mean maximum9°C
(48°F)		11°C
(52°F)		17°C
(62°F)		23°C
(73°F)		26°C
(80°F)		29°C
(84°F)		33°C
(92°F)		34°C
(94°F)		29°C
(85°F)		26°C
(79°F)		19°C
(66°F)		10°C
(51°F)
Average high2°C
(36°F)		4°C
(40°F)		11°C
(52°F)		16°C
(62°F)		21°C
(71°F)		26°C
(78°F)		29°C
(84°F)		29°C
(85°F)		26°C
(79°F)		20°C
(68°F)		12°C
(54°F)		4°C
(39°F)
Daily mean-2°C
(29°F)		-0°C
(32°F)		6°C
(44°F)		12°C
(54°F)		17°C
(63°F)		22°C
(72°F)		26°C
(78°F)		26°C
(80°F)		22°C
(72°F)		15°C
(59°F)		8°C
(46°F)		-0°C
(32°F)
Average low-6°C
(22°F)		-4°C
(25°F)		2°C
(36°F)		8°C
(46°F)		13°C
(56°F)		18°C
(65°F)		23°C
(74°F)		24°C
(75°F)		18°C
(65°F)		11°C
(52°F)		3°C
(38°F)		-4°C
(25°F)
Mean minimum-13°C
(9°F)		-10°C
(13°F)		-3°C
(26°F)		2°C
(36°F)		9°C
(48°F)		15°C
(59°F)		20°C
(68°F)		20°C
(68°F)		13°C
(55°F)		3°C
(38°F)		-3°C
(26°F)		-12°C
(11°F)
Minimum-17°C
(2°F)		-14°C
(7°F)		-6°C
(21°F)		0°C
(33°F)		7°C
(45°F)		14°C
(57°F)		18°C
(65°F)		16°C
(61°F)		11°C
(53°F)		1°C
(34°F)		-6°C
(21°F)		-14°C
(6°F)

Compare climate in Ganghwa-gun with other places

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

Monthly average precipitation in Ganghwa-gun, South Korea

Ganghwa-gun usually has the most precipitation in July, August and September, with an average of 12 rainy days and 198 mm (7.8 inches) of precipitation per month. The driest months in Ganghwa-gun are January, February and December. On average, 20 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ganghwa-gun. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)18 (0.7)21 (0.8)40 (1.6)49 (1.9)105 (4.1)73 (2.9)204 (8.0)244 (9.6)146 (5.7)56 (2.2)45 (1.8)21 (0.8)
Average precipitation days (≥ 1 mm)23468813158655

Monthly sunshine hours in Ganghwa-gun, South Korea

The sunniest months in Ganghwa-gun are May, June and July, when the sun shines an average of 10 hours 10 minutes a day. Least sunny months in Ganghwa-gun: January, November and December receive an average of 7 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ganghwa-gun. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours197242283288315320301293264264230234
Mean daily daylight hours9h 51m10h 46m11h 57m13h 10m14h 11m14h 42m14h 27m13h 33m12h 23m11h 11m10h 8m9h 35m

Solar UV radiation in Ganghwa-gun, South Korea

Ganghwa-gun 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 Ganghwa-gun UV Index data.

Average daily maximum UV levels by month for Ganghwa-gun. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346891011119643