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Monthly climate in Incheon, South Korea

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Incheon features a humid subtropical climate (Cwa).Temperatures typically range between -2 °C (29 °F) and 27 °C (80 °F) through the year, but rarely can drop to -16 °C (3 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1071 mm (42.2 inches) and receives 88 rainy days on the 1 mm (0.04 inches) threshold annually.Incheon enjoys an average of 3211 hours of sunshine throughout the year, and daylight varies from 9 hours 36 minutes to 14 hours 41 minutes per day.

Monthly average temperatures in Incheon, South Korea §

The warmest months in Incheon are July, August and September, with daily mean temperatures ranging from 22 to 27 °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 - 33 °F) throughout the day. On average each year, Incheon experiences 83 days above 25 °C (77.0 °F) and 84 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Incheon, South Korea.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 12°C
(54°F)		 15°C
(59°F)		 19°C
(66°F)		 25°C
(78°F)		 28°C
(82°F)		 31°C
(88°F)		 35°C
(95°F)		 36°C
(97°F)		 31°C
(87°F)		 28°C
(82°F)		 21°C
(69°F)		 12°C
(54°F)
Mean maximum 9°C
(49°F)		 11°C
(52°F)		 17°C
(62°F)		 23°C
(73°F)		 26°C
(79°F)		 28°C
(83°F)		 33°C
(92°F)		 34°C
(93°F)		 29°C
(85°F)		 26°C
(79°F)		 19°C
(67°F)		 11°C
(52°F)
Average high 3°C
(37°F)		 4°C
(40°F)		 11°C
(52°F)		 16°C
(62°F)		 21°C
(70°F)		 25°C
(77°F)		 28°C
(84°F)		 29°C
(85°F)		 26°C
(78°F)		 20°C
(68°F)		 13°C
(55°F)		 4°C
(40°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
(71°F)		 26°C
(78°F)		 27°C
(80°F)		 22°C
(72°F)		 15°C
(60°F)		 8°C
(47°F)		 0°C
(33°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
(66°F)		 23°C
(74°F)		 24°C
(76°F)		 19°C
(66°F)		 11°C
(52°F)		 4°C
(39°F)		 -4°C
(26°F)
Mean minimum -13°C
(9°F)		 -11°C
(13°F)		 -4°C
(25°F)		 2°C
(36°F)		 9°C
(48°F)		 15°C
(59°F)		 20°C
(68°F)		 20°C
(69°F)		 13°C
(55°F)		 4°C
(39°F)		 -3°C
(27°F)		 -12°C
(11°F)
Minimum -16°C
(3°F)		 -14°C
(6°F)		 -6°C
(21°F)		 1°C
(33°F)		 7°C
(44°F)		 14°C
(57°F)		 19°C
(66°F)		 17°C
(63°F)		 11°C
(53°F)		 2°C
(36°F)		 -5°C
(23°F)		 -14°C
(7°F)

Compare climate in Incheon with other places

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

Monthly average precipitation in Incheon, South Korea §

Incheon usually has the most precipitation in July, August and September, with an average of 12 rainy days and 207 mm (8.1 inches) of precipitation per month.The driest months in Incheon are January, February and December. On average, 21 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Incheon, South Korea.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 17 (0.7) 21 (0.8) 44 (1.7) 49 (1.9) 107 (4.2) 77 (3.0) 232 (9.1) 256 (10.1) 133 (5.2) 59 (2.3) 53 (2.1) 24 (0.9)
Average precipitation days (≥ 1 mm) 2 4 5 6 8 9 14 15 9 6 5 5

Monthly sunshine hours in Incheon, South Korea §

The sunniest months in Incheon are May, June and July, when the sun shines an average of 10 hours 1 minutes a day.Least sunny months in Incheon: January, November and December receive an average of 7 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Incheon, South Korea.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 198 242 281 286 311 317 293 288 262 262 230 235
Mean daily daylight hours 9h 53m 10h 47m 11h 57m 13h 9m 14h 10m 14h 41m 14h 25m 13h 32m 12h 23m 11h 11m 10h 9m 9h 36m

Solar UV radiation in Incheon, South Korea §

Incheon 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 Incheon UV Index data.

Average daily maximum UV levels by month for Incheon, South Korea.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 4 6 8 9 10 11 11 9 6 4 3