Ijūin climate — normals and trends

Q: What is the climate of Ijūin?

Ijūin has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.7 °C and it receives 2,040 mm of precipitation per year.

Q: What is the hottest day ever recorded in Ijūin?

The hottest day measured in Ijūin between 1940 and 2025 was 9 August 2024, reaching 36.0 °C.

Q: What is the coldest day in Ijūin?

The coldest day measured in Ijūin between 1940 and 2025 was 24 January 1976, at -2.8 °C.

Q: Does it snow in Ijūin?

Almost never: Ijūin sees virtually no snow, with about 2 frost days per year.

Q: Has the climate of Ijūin warmed?

Yes: Ijūin warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Ijūin?

The wettest day measured in Ijūin between 1940 and 2025 was 19 August 1946, with 203 mm of rain in 24 hours.

Q: What was the windiest day in Ijūin?

The windiest day measured in Ijūin between 1940 and 2025 was 7 September 2004, with winds reaching 69.6 km/h.

Q: What is the warmest month in Ijūin?

The warmest month in Ijūin is August (27.5 °C on average); the coldest is January (8.0 °C).

Q: How much does it rain in Ijūin?

Ijūin receives on average 2,040 mm of precipitation per year, spread over about 157 rainy days.

Q: Is it sunny in Ijūin?

Ijūin gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.

Ijūin (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.7 °C and it receives 2,040 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 (27.5 °C on average) and the coldest is January (8.0 °C). Rainfall peaks in June.

Ijūin averages 2 frost days, 50 hot days (≥ 30 °C) and 157 rainy days per year.

Ijūin has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.

The number of frost days there went from about 3 to 1 per year over the period.

The hottest day of the period reached 36.0 °C (on 9 August 2024) and the coldest -2.8 °C (on 24 January 1976).

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

IjūinKagoshima

coords: 31.62°, 130.40°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJuneDriest monthDecember

Mean daily temperature

17.7°C

Average daily high

21.4°C

Average daily low

14.5°C

Annual rainfall

2,040mm

Sunshine / day

8.3h

Mean relative humidity

76%

Average peak wind

15.6km/h

Seasonal range

19.5°C

Frost days (< 0 °C)

2 d/yr

Hot days (≥ 30 °C)

50 d/yr

Rainy days (≥ 1 mm)

157 d/yr

Annual snowfall

0.8 cm

Average feels-like high

22.1 °C

Average feels-like low

14.4 °C

Average peak gust

38.7 km/h

Tropical nights (≥ 20 °C)

113 d/yr

Solar radiation

14.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.3 °C

since 1940

+0.3 °C per decade · r² = 0.75 · 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

36.0 °C

9 August 2024

Coldest day

-2.8 °C

24 January 1976

Wettest day

203 mm

19 August 1946

Windiest day

69.6 km/h

7 September 2004

Strongest gust

177.1 km/h

7 September 2004

Hottest feels-like

44.0 °C

17 August 2020

Coldest feels-like

-8.7 °C

25 January 2023

Snowiest day

2.3 cm

7 February 1984

Sunniest day

13.7 h

9 June 1957

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	34.7 °C15 August 2025	-1.7 °C25 February 2025	18.7 °C	1,741 mm	96	3
2024	36.0 °C9 August 2024	1.7 °C23 December 2024	19.8 °C	2,541 mm	86	0
2023	34.1 °C20 August 2023	-1.6 °C25 January 2023	19.1 °C	2,307 mm	79	2
2022	34.5 °C30 August 2022	0.9 °C19 January 2022	18.8 °C	2,064 mm	84	0
2021	34.0 °C29 July 2021	-1.2 °C9 January 2021	18.9 °C	2,222 mm	75	2
2020	35.8 °C18 August 2020	1.5 °C31 December 2020	18.8 °C	2,668 mm	49	0
2019	34.0 °C1 August 2019	0.8 °C27 January 2019	19.0 °C	1,908 mm	56	0
2018	34.5 °C19 July 2018	-1.9 °C27 January 2018	18.6 °C	2,364 mm	71	6
2017	35.8 °C31 July 2017	-1.2 °C25 January 2017	18.2 °C	2,209 mm	65	2
2016	35.5 °C22 August 2016	-2.1 °C25 January 2016	19.2 °C	2,820 mm	77	2
2015	34.5 °C8 August 2015	0.3 °C18 January 2015	18.5 °C	2,847 mm	32	0
2014	33.6 °C26 July 2014	0.0 °C19 December 2014	18.1 °C	2,318 mm	40	0
2013	34.9 °C19 August 2013	0.7 °C29 January 2013	18.7 °C	1,630 mm	79	0
2012	32.6 °C28 July 2012	-1.6 °C3 February 2012	18.0 °C	2,673 mm	50	2
2011	34.6 °C1 September 2011	-1.0 °C16 January 2011	18.1 °C	2,180 mm	63	1
2010	33.4 °C3 August 2010	1.1 °C31 December 2010	18.6 °C	2,357 mm	63	0
2009	33.3 °C11 August 2009	1.4 °C24 January 2009	18.6 °C	1,846 mm	63	0
2008	34.5 °C1 August 2008	-0.4 °C18 February 2008	18.4 °C	1,976 mm	60	1
2007	34.2 °C27 July 2007	-0.8 °C3 February 2007	19.0 °C	1,846 mm	72	1
2006	34.5 °C9 August 2006	0.7 °C5 February 2006	18.7 °C	1,997 mm	56	0
2005	33.7 °C23 July 2005	-0.8 °C27 February 2005	18.0 °C	1,786 mm	66	1
2004	33.8 °C31 July 2004	0.3 °C22 January 2004	18.8 °C	2,077 mm	65	0
2003	33.4 °C21 August 2003	0.5 °C25 January 2003	18.7 °C	2,118 mm	57	0
2002	33.6 °C24 July 2002	1.6 °C14 December 2002	18.6 °C	1,941 mm	58	0
2001	34.1 °C26 July 2001	-0.4 °C17 February 2001	18.5 °C	2,084 mm	64	1
2000	33.8 °C12 August 2000	0.9 °C22 January 2000	18.4 °C	1,927 mm	50	0
1999	31.9 °C20 July 1999	-0.2 °C4 February 1999	18.4 °C	2,202 mm	37	1
1998	34.0 °C12 August 1998	-0.5 °C25 January 1998	19.4 °C	2,438 mm	74	1
1997	33.3 °C31 August 1997	0.2 °C23 January 1997	18.3 °C	2,024 mm	49	0
1996	33.5 °C5 August 1996	-1.6 °C11 February 1996	17.8 °C	1,881 mm	58	4
1995	33.6 °C2 August 1995	-0.9 °C31 December 1995	17.6 °C	1,920 mm	58	2
1994	35.6 °C6 August 1994	0.1 °C24 January 1994	18.7 °C	1,585 mm	80	0
1993	32.4 °C12 August 1993	0.4 °C25 February 1993	17.6 °C	3,232 mm	22	0
1992	33.4 °C24 July 1992	-0.2 °C2 February 1992	18.0 °C	2,053 mm	49	1
1991	33.4 °C18 August 1991	-1.6 °C22 February 1991	18.1 °C	2,343 mm	54	4
1990	34.7 °C30 July 1990	-1.2 °C26 January 1990	18.5 °C	2,514 mm	73	2
1989	32.8 °C13 August 1989	0.6 °C29 January 1989	18.2 °C	1,964 mm	46	0
1988	33.5 °C12 July 1988	0.1 °C4 February 1988	17.7 °C	1,735 mm	48	0
1987	33.3 °C29 August 1987	0.4 °C26 January 1987	18.1 °C	2,282 mm	48	0
1986	33.7 °C18 August 1986	-1.6 °C25 February 1986	17.4 °C	1,511 mm	48	3
1985	33.3 °C28 August 1985	-2.1 °C15 January 1985	17.8 °C	1,883 mm	57	4
1984	34.9 °C9 August 1984	-1.9 °C6 January 1984	17.4 °C	1,594 mm	51	5
1983	35.1 °C4 August 1983	-2.0 °C14 February 1983	17.9 °C	2,470 mm	46	7
1982	33.0 °C31 July 1982	-1.8 °C30 January 1982	17.7 °C	2,128 mm	30	3
1981	33.7 °C19 August 1981	-1.9 °C26 February 1981	17.5 °C	1,623 mm	56	5
1980	32.1 °C20 July 1980	-0.7 °C8 January 1980	17.5 °C	2,353 mm	29	3
1979	34.0 °C10 August 1979	1.7 °C17 January 1979	17.6 °C	2,179 mm	53	0
1978	33.2 °C21 July 1978	-1.5 °C11 January 1978	17.8 °C	1,643 mm	60	3
1977	32.9 °C17 August 1977	-2.8 °C19 February 1977	17.8 °C	1,933 mm	53	7
1976	32.8 °C20 August 1976	-2.8 °C24 January 1976	17.2 °C	2,617 mm	36	4
1975	32.7 °C20 August 1975	-0.3 °C24 February 1975	17.6 °C	2,195 mm	46	1
1974	33.7 °C15 August 1974	-2.5 °C28 February 1974	17.2 °C	1,947 mm	37	6
1973	33.1 °C9 August 1973	-0.1 °C25 December 1973	17.4 °C	2,013 mm	45	1
1972	32.7 °C2 August 1972	0.1 °C2 April 1972	17.6 °C	2,529 mm	37	0
1971	33.6 °C1 August 1971	-1.0 °C11 February 1971	17.5 °C	2,243 mm	48	3
1970	33.3 °C5 August 1970	-1.8 °C18 January 1970	17.1 °C	2,306 mm	47	7
1969	34.1 °C11 August 1969	-2.0 °C7 February 1969	17.4 °C	2,277 mm	53	2
1968	32.9 °C25 July 1968	-1.6 °C12 February 1968	17.0 °C	2,351 mm	36	5
1967	35.9 °C18 August 1967	-1.2 °C30 December 1967	17.5 °C	1,725 mm	61	6
1966	34.0 °C6 August 1966	-1.4 °C6 February 1966	17.1 °C	2,130 mm	42	1
1965	32.0 °C21 August 1965	-0.5 °C4 February 1965	16.3 °C	2,027 mm	24	1
1964	33.2 °C14 August 1964	-0.8 °C14 February 1964	18.1 °C	2,250 mm	64	1
1963	32.5 °C20 July 1963	-1.0 °C10 February 1963	17.2 °C	1,706 mm	46	3
1962	33.9 °C26 July 1962	-0.4 °C2 February 1962	17.1 °C	2,001 mm	45	1
1961	33.3 °C17 July 1961	-1.8 °C20 January 1961	18.0 °C	1,978 mm	75	14
1960	33.9 °C3 August 1960	-2.2 °C25 January 1960	17.7 °C	1,659 mm	69	8
1959	33.3 °C29 August 1959	-1.1 °C7 January 1959	17.7 °C	2,297 mm	56	5
1958	34.1 °C21 July 1958	-0.7 °C4 January 1958	17.8 °C	1,621 mm	71	1
1957	32.4 °C1 August 1957	-1.3 °C8 January 1957	16.9 °C	2,264 mm	36	7
1956	34.5 °C4 August 1956	-1.8 °C13 March 1956	17.0 °C	1,864 mm	49	6
1955	33.4 °C20 July 1955	-1.8 °C4 January 1955	17.6 °C	1,976 mm	56	6
1954	33.7 °C11 August 1954	-0.7 °C27 January 1954	17.7 °C	2,184 mm	38	3
1953	33.9 °C23 August 1953	-1.2 °C17 January 1953	17.4 °C	2,020 mm	48	4
1952	32.9 °C3 August 1952	-1.9 °C6 February 1952	17.2 °C	2,077 mm	32	2
1951	32.9 °C13 August 1951	-0.7 °C14 January 1951	16.9 °C	1,973 mm	33	2
1950	31.2 °C3 August 1950	0.6 °C28 February 1950	17.0 °C	1,713 mm	10	0
1949	31.0 °C4 August 1949	0.5 °C17 January 1949	16.7 °C	2,207 mm	9	0
1948	31.3 °C20 August 1948	0.2 °C30 January 1948	17.2 °C	1,847 mm	12	0
1947	32.2 °C12 August 1947	-0.5 °C16 February 1947	16.0 °C	1,237 mm	42	2
1946	34.5 °C26 July 1946	0.1 °C4 February 1946	17.1 °C	1,410 mm	29	0
1945	31.2 °C10 August 1945	0.2 °C17 January 1945	16.4 °C	2,091 mm	22	0
1944	31.3 °C4 September 1944	-0.1 °C16 February 1944	16.8 °C	1,505 mm	21	1
1943	31.7 °C15 August 1943	-0.3 °C1 February 1943	16.4 °C	1,150 mm	9	2
1942	35.5 °C4 August 1942	-1.7 °C13 February 1942	16.8 °C	1,421 mm	55	5
1941	31.9 °C19 August 1941	-1.4 °C1 February 1941	16.7 °C	1,465 mm	15	3
1940	32.4 °C28 July 1940	-0.3 °C5 February 1940	16.2 °C	1,205 mm	12	2

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

22.6 °C

+1.2 °C

Hot days (≥ 30 °C)

96 d/yr

+46

Frost days (< 0 °C)

3 d/yr

Annual rainfall

1741 mm

-299 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	12.2 °C	+0.7 °C	48 mm	-25 mm
Feb	11.4 °C	-1.2 °C	75 mm	-22 mm
Mar	17.0 °C	+1.2 °C	146 mm	+5 mm
Apr	20.8 °C	+0.5 °C	144 mm	-35 mm
May	23.8 °C	+0.1 °C	325 mm	+101 mm
Jun	28.6 °C	+2.4 °C	272 mm	-149 mm
Jul	31.3 °C	+1.4 °C	103 mm	-157 mm
Aug	32.0 °C	+1.2 °C	232 mm	+50 mm
Sep	30.9 °C	+2.3 °C	138 mm	-51 mm
Oct	27.3 °C	+3.2 °C	146 mm	+36 mm
Nov	19.8 °C	+0.7 °C	50 mm	-43 mm
Dec	15.9 °C	+2.1 °C	63 mm	-10 mm

The year's extremes

Hottest day

34.7 °C

15 Aug 2025

Coldest day

-1.7 °C

25 Feb 2025

Wettest day

91.4 mm

21 May 2025

Windiest day

33.0 km/h

16 Mar 2025

Strongest gust

85.0 km/h

14 Apr 2025

Hottest feels-like

43.0 °C

2 Jul 2025

Coldest feels-like

-5.6 °C

8 Feb 2025

Snowiest day

0.2 cm

8 Feb 2025

Sunniest day

13.5 h

5 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 Ijūin?

Ijūin has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.7 °C and it receives 2,040 mm of precipitation per year.

What is the hottest day ever recorded in Ijūin?

The hottest day measured in Ijūin between 1940 and 2025 was 9 August 2024, reaching 36.0 °C.

What is the coldest day in Ijūin?

The coldest day measured in Ijūin between 1940 and 2025 was 24 January 1976, at -2.8 °C.

Does it snow in Ijūin?

Almost never: Ijūin sees virtually no snow, with about 2 frost days per year.

Has the climate of Ijūin warmed?

Yes: Ijūin warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Ijūin?

The wettest day measured in Ijūin between 1940 and 2025 was 19 August 1946, with 203 mm of rain in 24 hours.

What was the windiest day in Ijūin?

The windiest day measured in Ijūin between 1940 and 2025 was 7 September 2004, with winds reaching 69.6 km/h.

What is the warmest month in Ijūin?

The warmest month in Ijūin is August (27.5 °C on average); the coldest is January (8.0 °C).

How much does it rain in Ijūin?

Ijūin receives on average 2,040 mm of precipitation per year, spread over about 157 rainy days.

Is it sunny in Ijūin?

Ijūin gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.

What is the biggest single-day snowfall in Ijūin?

The heaviest 24-hour snowfall measured in Ijūin between 1940 and 2025 was 7 February 1984, with 2.3 cm.

Are there tropical nights in Ijūin?

Yes: Ijūin has on average 113 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Ijūin?

In Ijūin, between 1940 and 2025, the highest apparent temperature reached 44.0 °C on 17 August 2020, and the lowest was -8.7 °C on 25 January 2023.

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