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Monthly climate in Illo, Jeollanam-do, South Korea

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Illo features a humid subtropical climate (Cfa).Temperatures typically range between 3 °C (37 °F) and 27 °C (80 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 33 °C (93 °F).The average annual precipitation amounts to about 1217 mm (47.9 inches) and receives 98 rainy days on the 1 mm (0.04 inches) threshold annually.Illo enjoys an average of 3194 hours of sunshine throughout the year, and daylight varies from 9 hours 50 minutes to 14 hours 26 minutes per day.

Monthly average temperatures in Illo, Jeollanam-do, South Korea §

The warmest months in Illo are July, August and September, with daily mean temperatures ranging from 22 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 3 to 5 °C (37 - 41 °F) throughout the day. On average each year, Illo experiences 68 days above 25 °C (77.0 °F) and 34 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Illo, Jeollanam-do, 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 16°C
(61°F)		 16°C
(60°F)		 18°C
(64°F)		 21°C
(71°F)		 26°C
(79°F)		 28°C
(82°F)		 32°C
(90°F)		 33°C
(93°F)		 30°C
(86°F)		 27°C
(81°F)		 21°C
(70°F)		 17°C
(62°F)
Mean maximum 12°C
(53°F)		 13°C
(55°F)		 17°C
(62°F)		 20°C
(69°F)		 24°C
(76°F)		 26°C
(80°F)		 30°C
(86°F)		 32°C
(90°F)		 28°C
(83°F)		 25°C
(77°F)		 20°C
(68°F)		 14°C
(57°F)
Average high 6°C
(43°F)		 7°C
(45°F)		 12°C
(53°F)		 16°C
(61°F)		 21°C
(69°F)		 24°C
(76°F)		 27°C
(81°F)		 29°C
(85°F)		 25°C
(77°F)		 20°C
(69°F)		 15°C
(59°F)		 8°C
(47°F)
Daily mean 3°C
(37°F)		 4°C
(39°F)		 8°C
(47°F)		 13°C
(55°F)		 17°C
(63°F)		 21°C
(71°F)		 25°C
(77°F)		 27°C
(80°F)		 22°C
(73°F)		 17°C
(63°F)		 11°C
(52°F)		 5°C
(41°F)
Average low 0°C
(33°F)		 1°C
(33°F)		 5°C
(41°F)		 9°C
(49°F)		 14°C
(58°F)		 19°C
(66°F)		 23°C
(74°F)		 25°C
(77°F)		 20°C
(68°F)		 14°C
(58°F)		 8°C
(47°F)		 2°C
(36°F)
Mean minimum -5°C
(24°F)		 -4°C
(26°F)		 -0°C
(32°F)		 4°C
(40°F)		 10°C
(50°F)		 15°C
(60°F)		 20°C
(68°F)		 21°C
(71°F)		 15°C
(60°F)		 9°C
(48°F)		 3°C
(38°F)		 -4°C
(25°F)
Minimum -10°C
(14°F)		 -5°C
(23°F)		 -1°C
(30°F)		 3°C
(38°F)		 8°C
(46°F)		 14°C
(57°F)		 18°C
(65°F)		 19°C
(67°F)		 14°C
(58°F)		 6°C
(44°F)		 2°C
(35°F)		 -7°C
(20°F)

Compare climate in Illo with other places

Compare temperature, precipitation, sunshine, UV index in Illo, Jeollanam-do, South Korea with other places around the world.

Monthly average precipitation in Illo, Jeollanam-do, South Korea §

Illo usually has the most precipitation in July, August and September, with an average of 12 rainy days and 203 mm (8.0 inches) of precipitation per month.The driest months in Illo are January, November and December. On average, 35 mm (1.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Illo, Jeollanam-do, 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) 36 (1.4) 37 (1.5) 75 (2.9) 65 (2.6) 94 (3.7) 156 (6.1) 194 (7.6) 181 (7.1) 233 (9.2) 78 (3.1) 34 (1.3) 35 (1.4)
Average precipitation days (≥ 1 mm) 7 7 8 6 7 9 13 11 13 5 5 7

Monthly sunshine hours in Illo, Jeollanam-do, South Korea §

The sunniest months in Illo are May, June and August, when the sun shines an average of 10 hours 8 minutes a day.Least sunny months in Illo: January, November and December receive an average of 6 hours 46 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Illo, Jeollanam-do, 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 178 232 275 290 309 308 303 315 266 269 231 213
Mean daily daylight hours 10h 5m 10h 54m 11h 58m 13h 3m 13h 59m 14h 26m 14h 12m 13h 24m 12h 21m 11h 16m 10h 20m 9h 50m

Solar UV radiation in Illo, Jeollanam-do, South Korea §

Illo experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 12, 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 Illo UV Index data.

Average daily maximum UV levels by month for Illo, Jeollanam-do, 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) 4 5 7 9 10 11 12 12 10 7 5 3