Icheon-si climate — normals and trends

Q: What is the climate of Icheon-si?

Icheon-si has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 11.6 °C and it receives 1,260 mm of precipitation per year.

Q: What is the hottest day ever recorded in Icheon-si?

The hottest day measured in Icheon-si between 1940 and 2025 was 15 August 2018, reaching 38.3 °C.

Q: What is the coldest day in Icheon-si?

The coldest day measured in Icheon-si between 1940 and 2025 was 18 January 1945, at -24.7 °C.

Q: Does it snow in Icheon-si?

Yes. Icheon-si gets on average 24.8 cm of snow per year and has around 116 frost days.

Q: Has the climate of Icheon-si warmed?

Yes: Icheon-si warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Icheon-si?

The wettest day measured in Icheon-si between 1940 and 2025 was 19 August 1972, with 180 mm of rain in 24 hours.

Q: What was the windiest day in Icheon-si?

The windiest day measured in Icheon-si between 1940 and 2025 was 28 August 2012, with winds reaching 44.3 km/h.

Q: What is the warmest month in Icheon-si?

The warmest month in Icheon-si is August (25.2 °C on average); the coldest is January (-3.5 °C).

Q: How much does it rain in Icheon-si?

Icheon-si receives on average 1,260 mm of precipitation per year, spread over about 103 rainy days.

Q: Is it sunny in Icheon-si?

Icheon-si gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.

Icheon-si (South Korea) has a hot-summer humid continental, dry winter climate (Dwa) under the Köppen-Geiger classification. Its mean annual temperature is 11.6 °C and it receives 1,260 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is August (25.2 °C on average) and the coldest is January (-3.5 °C). Rainfall peaks in July.

Icheon-si averages 116 frost days, 29 hot days (≥ 30 °C) and 103 rainy days per year.

Icheon-si has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.

The number of frost days there went from about 127 to 105 per year over the period.

The hottest day of the period reached 38.3 °C (on 15 August 2018) and the coldest -24.7 °C (on 18 January 1945).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

Icheon-siGyeonggi-do

coords: 37.28°, 127.44°
period: 1940–2025 · 86 yrs

DwaHot-summer humid continental, dry winterWarmest monthAugustColdest monthJanuaryWettest monthJulyDriest monthJanuary

Mean daily temperature

11.6°C

Average daily high

16.6°C

Average daily low

6.9°C

Annual rainfall

1,260mm

Sunshine / day

8.6h

Mean relative humidity

70%

Average peak wind

13.6km/h

Seasonal range

28.7°C

Frost days (< 0 °C)

116 d/yr

Hot days (≥ 30 °C)

29 d/yr

Rainy days (≥ 1 mm)

103 d/yr

Annual snowfall

24.8 cm

Average feels-like high

15.5 °C

Average feels-like low

5.4 °C

Average peak gust

32.2 km/h

Tropical nights (≥ 20 °C)

54 d/yr

Solar radiation

14.7 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.2 °C

since 1940

+0.3 °C per decade · r² = 0.54 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

38.3 °C

15 August 2018

Coldest day

-24.7 °C

18 January 1945

Wettest day

180 mm

19 August 1972

Windiest day

44.3 km/h

28 August 2012

Strongest gust

112.7 km/h

7 September 2019

Hottest feels-like

44.3 °C

1 August 2018

Coldest feels-like

-30.1 °C

18 January 1945

Snowiest day

20.4 cm

28 January 1969

Sunniest day

14.3 h

28 June 1951

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.8 °C27 July 2025	-15.9 °C10 January 2025	13.2 °C	1,379 mm	66	110
2024	35.6 °C19 June 2024	-13.7 °C23 January 2024	14.0 °C	1,426 mm	71	99
2023	35.1 °C6 August 2023	-18.3 °C25 January 2023	13.4 °C	1,540 mm	51	105
2022	34.1 °C29 July 2022	-15.8 °C24 December 2022	12.4 °C	1,342 mm	33	104
2021	35.1 °C30 July 2021	-18.3 °C8 January 2021	13.0 °C	1,152 mm	36	89
2020	34.3 °C22 June 2020	-13.9 °C31 December 2020	12.6 °C	1,501 mm	23	96
2019	35.1 °C3 August 2019	-10.6 °C6 December 2019	12.9 °C	907 mm	31	110
2018	38.3 °C15 August 2018	-17.2 °C26 January 2018	12.3 °C	1,200 mm	47	103
2017	34.7 °C5 August 2017	-13.6 °C24 January 2017	12.5 °C	1,027 mm	37	114
2016	34.7 °C5 August 2016	-16.3 °C24 January 2016	13.2 °C	926 mm	51	106
2015	34.8 °C10 June 2015	-12.7 °C9 February 2015	13.2 °C	716 mm	44	98
2014	33.4 °C1 August 2014	-11.8 °C18 December 2014	12.6 °C	891 mm	24	109
2013	33.3 °C8 August 2013	-19.5 °C3 January 2013	12.0 °C	1,144 mm	42	122
2012	35.9 °C5 August 2012	-19.2 °C3 February 2012	11.6 °C	1,595 mm	36	120
2011	33.9 °C5 August 2011	-19.2 °C16 January 2011	11.6 °C	1,661 mm	21	119
2010	34.2 °C9 August 2010	-22.5 °C7 January 2010	11.9 °C	1,150 mm	40	118
2009	34.0 °C27 June 2009	-13.7 °C25 January 2009	12.2 °C	1,010 mm	21	110
2008	34.8 °C8 August 2008	-13.9 °C17 January 2008	12.4 °C	950 mm	28	105
2007	33.3 °C18 June 2007	-10.9 °C9 January 2007	12.5 °C	1,607 mm	35	112
2006	34.6 °C8 August 2006	-15.3 °C4 February 2006	12.4 °C	1,305 mm	27	110
2005	35.1 °C6 August 2005	-16.5 °C18 December 2005	11.5 °C	1,405 mm	31	122
2004	35.2 °C31 July 2004	-18.4 °C22 January 2004	12.5 °C	1,287 mm	36	108
2003	31.8 °C22 June 2003	-21.6 °C6 January 2003	12.0 °C	1,508 mm	12	104
2002	33.6 °C27 July 2002	-15.0 °C3 January 2002	12.0 °C	1,356 mm	17	115
2001	34.3 °C17 August 2001	-20.3 °C15 January 2001	12.2 °C	899 mm	46	125
2000	33.0 °C6 July 2000	-17.5 °C27 December 2000	11.9 °C	1,275 mm	46	122
1999	33.7 °C17 August 1999	-12.7 °C21 December 1999	12.3 °C	1,314 mm	37	113
1998	32.5 °C12 September 1998	-14.7 °C24 January 1998	12.9 °C	1,714 mm	15	110
1997	34.6 °C26 July 1997	-14.2 °C22 January 1997	11.9 °C	1,210 mm	43	110
1996	34.8 °C2 August 1996	-14.5 °C2 February 1996	11.3 °C	1,084 mm	27	123
1995	33.2 °C14 August 1995	-12.9 °C30 January 1995	11.4 °C	1,075 mm	22	120
1994	36.5 °C23 July 1994	-14.7 °C16 December 1994	12.7 °C	1,012 mm	41	110
1993	31.1 °C5 July 1993	-12.7 °C19 January 1993	11.3 °C	1,404 mm	2	113
1992	32.4 °C6 July 1992	-12.8 °C7 February 1992	11.8 °C	1,281 mm	13	106
1991	33.5 °C20 August 1991	-19.3 °C30 December 1991	11.6 °C	1,284 mm	12	108
1990	34.0 °C7 August 1990	-19.0 °C23 January 1990	12.3 °C	1,768 mm	25	87
1989	34.1 °C5 August 1989	-13.2 °C28 January 1989	12.4 °C	1,512 mm	22	96
1988	34.8 °C10 August 1988	-13.0 °C16 December 1988	11.5 °C	922 mm	21	117
1987	32.3 °C26 June 1987	-18.3 °C14 January 1987	11.6 °C	1,618 mm	13	114
1986	31.9 °C2 August 1986	-24.0 °C11 January 1986	10.7 °C	1,277 mm	8	120
1985	33.9 °C8 August 1985	-20.0 °C30 January 1985	11.3 °C	1,562 mm	31	117
1984	33.8 °C10 August 1984	-23.4 °C6 January 1984	10.9 °C	1,189 mm	34	119
1983	33.3 °C5 August 1983	-15.8 °C25 December 1983	11.7 °C	1,103 mm	20	122
1982	34.8 °C9 July 1982	-14.4 °C29 January 1982	12.0 °C	1,077 mm	22	109
1981	33.4 °C31 July 1981	-23.4 °C4 January 1981	10.5 °C	1,355 mm	23	120
1980	31.9 °C14 June 1980	-19.0 °C6 February 1980	10.3 °C	1,433 mm	1	113
1979	32.3 °C13 August 1979	-20.3 °C2 February 1979	11.9 °C	1,533 mm	18	111
1978	35.5 °C26 July 1978	-16.7 °C15 February 1978	12.2 °C	1,402 mm	39	109
1977	35.2 °C29 July 1977	-17.8 °C16 February 1977	11.8 °C	1,146 mm	23	99
1976	32.5 °C28 June 1976	-17.5 °C27 December 1976	11.1 °C	1,257 mm	10	118
1975	33.6 °C30 July 1975	-11.2 °C18 January 1975	12.0 °C	1,588 mm	31	108
1974	32.1 °C20 August 1974	-17.0 °C24 January 1974	10.6 °C	1,469 mm	15	122
1973	34.6 °C17 July 1973	-24.3 °C24 December 1973	11.7 °C	920 mm	41	117
1972	34.6 °C20 July 1972	-13.9 °C27 January 1972	11.5 °C	1,694 mm	19	110
1971	33.0 °C2 August 1971	-17.1 °C5 January 1971	11.3 °C	1,347 mm	10	110
1970	33.0 °C12 August 1970	-21.0 °C5 January 1970	11.0 °C	1,154 mm	20	130
1969	32.3 °C3 July 1969	-23.5 °C6 February 1969	10.5 °C	1,558 mm	16	129
1968	32.0 °C25 July 1968	-15.8 °C15 January 1968	11.2 °C	1,047 mm	13	110
1967	34.5 °C25 July 1967	-21.9 °C16 January 1967	11.2 °C	1,053 mm	31	115
1966	32.3 °C9 August 1966	-17.3 °C20 January 1966	11.3 °C	1,003 mm	26	115
1965	34.9 °C25 June 1965	-18.9 °C13 January 1965	11.2 °C	1,100 mm	36	127
1964	34.8 °C27 July 1964	-20.6 °C13 February 1964	12.0 °C	1,919 mm	34	119
1963	33.5 °C6 August 1963	-23.7 °C22 January 1963	10.8 °C	1,504 mm	22	122
1962	34.7 °C25 July 1962	-11.5 °C28 January 1962	11.7 °C	1,308 mm	43	121
1961	35.0 °C31 July 1961	-23.0 °C5 January 1961	12.3 °C	1,257 mm	48	108
1960	35.0 °C7 August 1960	-20.3 °C31 December 1960	12.1 °C	1,085 mm	52	119
1959	36.6 °C3 August 1959	-18.1 °C5 January 1959	12.2 °C	1,489 mm	38	102
1958	36.1 °C25 June 1958	-24.4 °C18 January 1958	11.5 °C	1,686 mm	38	105
1957	33.3 °C10 August 1957	-17.2 °C11 February 1957	10.7 °C	1,284 mm	17	136
1956	36.0 °C31 July 1956	-20.2 °C23 December 1956	10.1 °C	1,790 mm	31	132
1955	33.0 °C10 August 1955	-18.7 °C11 January 1955	11.5 °C	1,239 mm	46	126
1954	33.6 °C14 August 1954	-12.9 °C3 February 1954	11.7 °C	1,448 mm	26	112
1953	34.8 °C17 August 1953	-16.3 °C2 February 1953	11.3 °C	1,031 mm	35	129
1952	34.9 °C16 August 1952	-15.2 °C3 February 1952	11.7 °C	1,109 mm	50	116
1951	35.7 °C1 July 1951	-24.3 °C13 January 1951	11.2 °C	750 mm	43	117
1950	33.8 °C25 July 1950	-20.7 °C28 December 1950	11.1 °C	1,211 mm	28	122
1949	33.3 °C18 July 1949	-15.2 °C29 December 1949	10.9 °C	869 mm	20	127
1948	31.0 °C21 August 1948	-20.5 °C28 January 1948	11.2 °C	1,795 mm	17	112
1947	30.6 °C31 July 1947	-19.1 °C19 December 1947	9.2 °C	1,331 mm	6	141
1946	35.1 °C28 July 1946	-20.5 °C5 January 1946	11.1 °C	717 mm	36	128
1945	31.4 °C3 August 1945	-24.7 °C18 January 1945	9.5 °C	1,454 mm	6	138
1944	34.0 °C6 August 1944	-15.1 °C27 December 1944	10.5 °C	1,288 mm	19	129
1943	31.2 °C10 August 1943	-18.8 °C12 January 1943	11.0 °C	767 mm	12	126
1942	35.4 °C12 July 1942	-18.5 °C17 January 1942	11.0 °C	349 mm	65	143
1941	31.5 °C7 August 1941	-22.1 °C25 January 1941	10.1 °C	923 mm	4	130
1940	31.5 °C31 July 1940	-18.6 °C10 January 1940	10.1 °C	1,178 mm	5	141

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

18.3 °C

+1.7 °C

Hot days (≥ 30 °C)

66 d/yr

+37

Frost days (< 0 °C)

110 d/yr

-6

Annual rainfall

1379 mm

+119 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	3.3 °C	+2.1 °C	19 mm	-6 mm
Feb	3.3 °C	-0.8 °C	7 mm	-22 mm
Mar	13.1 °C	+2.9 °C	48 mm	-5 mm
Apr	19.1 °C	+1.6 °C	84 mm	-4 mm
May	22.5 °C	-0.4 °C	93 mm	-4 mm
Jun	28.6 °C	+2.1 °C	148 mm	+5 mm
Jul	31.8 °C	+3.3 °C	247 mm	-70 mm
Aug	31.1 °C	+1.9 °C	213 mm	-14 mm
Sep	26.6 °C	+1.6 °C	284 mm	+135 mm
Oct	20.2 °C	+1.1 °C	180 mm	+126 mm
Nov	13.8 °C	+2.5 °C	13 mm	-36 mm
Dec	5.0 °C	+1.3 °C	42 mm	+13 mm

The year's extremes

Hottest day

35.8 °C

27 Jul 2025

Coldest day

-15.9 °C

10 Jan 2025

Wettest day

83.8 mm

17 Jul 2025

Windiest day

35.5 km/h

25 Mar 2025

Strongest gust

79.2 km/h

13 Apr 2025

Hottest feels-like

43.0 °C

29 Jul 2025

Coldest feels-like

-21.4 °C

8 Feb 2025

Snowiest day

9.9 cm

3 Mar 2025

Sunniest day

13.5 h

22 Jun 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Icheon-si?

Icheon-si has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 11.6 °C and it receives 1,260 mm of precipitation per year.

What is the hottest day ever recorded in Icheon-si?

The hottest day measured in Icheon-si between 1940 and 2025 was 15 August 2018, reaching 38.3 °C.

What is the coldest day in Icheon-si?

The coldest day measured in Icheon-si between 1940 and 2025 was 18 January 1945, at -24.7 °C.

Does it snow in Icheon-si?

Yes. Icheon-si gets on average 24.8 cm of snow per year and has around 116 frost days.

Has the climate of Icheon-si warmed?

Yes: Icheon-si warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Icheon-si?

The wettest day measured in Icheon-si between 1940 and 2025 was 19 August 1972, with 180 mm of rain in 24 hours.

What was the windiest day in Icheon-si?

The windiest day measured in Icheon-si between 1940 and 2025 was 28 August 2012, with winds reaching 44.3 km/h.

What is the warmest month in Icheon-si?

The warmest month in Icheon-si is August (25.2 °C on average); the coldest is January (-3.5 °C).

How much does it rain in Icheon-si?

Icheon-si receives on average 1,260 mm of precipitation per year, spread over about 103 rainy days.

Is it sunny in Icheon-si?

Icheon-si gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.

What is the biggest single-day snowfall in Icheon-si?

The heaviest 24-hour snowfall measured in Icheon-si between 1940 and 2025 was 28 January 1969, with 20.4 cm.

Are there tropical nights in Icheon-si?

Yes: Icheon-si has on average 54 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Icheon-si?

In Icheon-si, between 1940 and 2025, the highest apparent temperature reached 44.3 °C on 1 August 2018, and the lowest was -30.1 °C on 18 January 1945.

Compare Icheon-si with another city

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