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Monthly climate in Icheon-si, South Korea

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Icheon-si features a humid continental climate (Dwa). Temperatures typically range between -2 °C (28 °F) and 26 °C (79 °F) through the year, but rarely can drop to -18 °C (-1 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 1187 mm (46.7 inches) and receives 95 rainy days on the 1 mm (0.04 inches) threshold annually. Icheon-si enjoys an average of 3100 hours of sunshine throughout the year, and daylight varies from 9 hours 37 minutes to 14 hours 40 minutes per day.

Monthly average temperatures in Icheon-si, South Korea

The warmest months in Icheon-si are June, July and August, with daily mean temperatures ranging from 22 to 26 °C (72 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 0 °C (28 - 32 °F) throughout the day. On average each year, Icheon-si experiences 99 days above 25 °C (77.0 °F) and 96 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Icheon-si. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(55°F)		19°C
(67°F)		22°C
(72°F)		28°C
(82°F)		33°C
(92°F)		34°C
(94°F)		35°C
(96°F)		38°C
(101°F)		30°C
(86°F)		29°C
(84°F)		21°C
(69°F)		13°C
(55°F)
Mean maximum10°C
(50°F)		13°C
(57°F)		20°C
(68°F)		26°C
(79°F)		30°C
(87°F)		32°C
(89°F)		34°C
(93°F)		35°C
(95°F)		29°C
(85°F)		26°C
(80°F)		20°C
(68°F)		12°C
(53°F)
Average high3°C
(38°F)		5°C
(42°F)		13°C
(55°F)		18°C
(65°F)		24°C
(75°F)		28°C
(82°F)		29°C
(85°F)		30°C
(86°F)		25°C
(78°F)		20°C
(68°F)		13°C
(55°F)		4°C
(40°F)
Daily mean-2°C
(28°F)		0°C
(32°F)		7°C
(45°F)		12°C
(55°F)		18°C
(64°F)		22°C
(72°F)		26°C
(78°F)		26°C
(79°F)		21°C
(70°F)		14°C
(58°F)		7°C
(45°F)		-0°C
(31°F)
Average low-6°C
(21°F)		-5°C
(24°F)		1°C
(35°F)		6°C
(43°F)		12°C
(54°F)		17°C
(64°F)		22°C
(72°F)		23°C
(73°F)		16°C
(62°F)		9°C
(48°F)		2°C
(35°F)		-5°C
(24°F)
Mean minimum-14°C
(7°F)		-11°C
(12°F)		-4°C
(25°F)		-0°C
(31°F)		6°C
(43°F)		13°C
(55°F)		18°C
(65°F)		18°C
(65°F)		10°C
(51°F)		1°C
(34°F)		-5°C
(24°F)		-13°C
(9°F)
Minimum-18°C
(-1°F)		-16°C
(4°F)		-6°C
(21°F)		-3°C
(27°F)		4°C
(39°F)		12°C
(54°F)		17°C
(62°F)		15°C
(60°F)		7°C
(45°F)		-1°C
(31°F)		-6°C
(21°F)		-15°C
(5°F)

Compare climate in Icheon-si with other places

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

Monthly average precipitation in Icheon-si, South Korea

Icheon-si usually has the most precipitation in July, August and September, with an average of 14 rainy days and 225 mm (8.9 inches) of precipitation per month. The driest months in Icheon-si are January, February and December. On average, 25 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Icheon-si. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)23 (0.9)26 (1.0)57 (2.3)71 (2.8)109 (4.3)85 (3.3)265 (10.4)267 (10.5)144 (5.7)62 (2.4)53 (2.1)25 (1.0)
Average precipitation days (≥ 1 mm)34679816179655

Monthly sunshine hours in Icheon-si, South Korea

The sunniest months in Icheon-si are April, May and June, when the sun shines an average of 9 hours 44 minutes a day. Least sunny months in Icheon-si: January, November and December receive an average of 7 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Icheon-si. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours196237273278302305274262249256228234
Mean daily daylight hours9h 53m10h 48m11h 57m13h 9m14h 9m14h 40m14h 24m13h 32m12h 23m11h 12m10h 10m9h 37m

Solar UV radiation in Icheon-si, South Korea

Icheon-si 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 4. For more detailed information, check out our hourly Icheon-si UV Index data.

Average daily maximum UV levels by month for Icheon-si. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346991111119643