Iijima climate — normals and trends

Q: What is the climate of Iijima?

Iijima has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 2,332 mm of precipitation per year.

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

The hottest day measured in Iijima between 1940 and 2025 was 1 August 2022, reaching 33.7 °C.

Q: What is the coldest day in Iijima?

The coldest day measured in Iijima between 1940 and 2025 was 4 January 1958, at -10.4 °C.

Q: Does it snow in Iijima?

Yes. Iijima gets on average 188.5 cm of snow per year and has around 55 frost days.

Q: Has the climate of Iijima warmed?

Yes: Iijima warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Iijima?

The wettest day measured in Iijima between 1940 and 2025 was 10 July 2002, with 150 mm of rain in 24 hours.

Q: What was the windiest day in Iijima?

The windiest day measured in Iijima between 1940 and 2025 was 16 September 1961, with winds reaching 72.6 km/h.

Q: What is the warmest month in Iijima?

The warmest month in Iijima is August (25.2 °C on average); the coldest is January (1.9 °C).

Q: How much does it rain in Iijima?

Iijima receives on average 2,332 mm of precipitation per year, spread over about 203 rainy days.

Q: Is it sunny in Iijima?

Iijima gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.

Iijima (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.2 °C and it receives 2,332 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 (1.9 °C). Rainfall peaks in July.

Iijima averages 55 frost days, 11 hot days (≥ 30 °C) and 203 rainy days per year.

Iijima has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.

The number of frost days there went from about 77 to 33 per year over the period.

The hottest day of the period reached 33.7 °C (on 1 August 2022) and the coldest -10.4 °C (on 4 January 1958).

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

IijimaFukui

coords: 36.09°, 136.36°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJulyDriest monthApril

Mean daily temperature

13.2°C

Average daily high

16.1°C

Average daily low

10.1°C

Annual rainfall

2,332mm

Sunshine / day

8.7h

Mean relative humidity

77%

Average peak wind

17.8km/h

Seasonal range

23.3°C

Frost days (< 0 °C)

55 d/yr

Hot days (≥ 30 °C)

11 d/yr

Rainy days (≥ 1 mm)

203 d/yr

Annual snowfall

188.5 cm

Average feels-like high

15.4 °C

Average feels-like low

8.5 °C

Average peak gust

41.5 km/h

Tropical nights (≥ 20 °C)

67 d/yr

Solar radiation

14.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.4 °C

since 1940

+0.3 °C per decade · r² = 0.63 · 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

33.7 °C

1 August 2022

Coldest day

-10.4 °C

4 January 1958

Wettest day

150 mm

10 July 2002

Windiest day

72.6 km/h

16 September 1961

Strongest gust

173.2 km/h

16 September 1961

Hottest feels-like

39.9 °C

3 August 2024

Coldest feels-like

-14.9 °C

4 January 1958

Snowiest day

20.5 cm

12 March 1969

Sunniest day

14.0 h

28 May 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	33.0 °C26 July 2025	-4.4 °C27 December 2025	14.6 °C	2,295 mm	48	28
2024	32.6 °C5 July 2024	-4.4 °C24 January 2024	15.3 °C	2,662 mm	39	22
2023	33.2 °C10 August 2023	-5.9 °C26 January 2023	15.2 °C	2,456 mm	55	30
2022	33.7 °C1 August 2022	-4.5 °C6 January 2022	14.4 °C	2,207 mm	29	56
2021	31.6 °C2 August 2021	-6.4 °C27 December 2021	14.6 °C	2,760 mm	15	27
2020	33.4 °C10 August 2020	-5.9 °C21 December 2020	14.7 °C	2,557 mm	23	15
2019	33.2 °C7 August 2019	-2.9 °C30 January 2019	14.7 °C	1,977 mm	26	17
2018	32.8 °C20 July 2018	-5.5 °C12 January 2018	14.5 °C	2,717 mm	30	44
2017	32.8 °C6 August 2017	-5.0 °C26 January 2017	13.7 °C	2,449 mm	10	39
2016	31.2 °C7 August 2016	-6.7 °C25 January 2016	14.7 °C	2,134 mm	12	22
2015	32.1 °C26 July 2015	-4.1 °C14 January 2015	14.3 °C	2,344 mm	17	26
2014	32.0 °C26 July 2014	-6.7 °C14 January 2014	13.4 °C	2,259 mm	9	57
2013	31.2 °C19 August 2013	-8.6 °C26 February 2013	13.7 °C	2,408 mm	17	47
2012	31.8 °C21 August 2012	-7.7 °C19 February 2012	13.4 °C	2,159 mm	26	68
2011	31.1 °C9 July 2011	-5.7 °C11 January 2011	13.6 °C	2,194 mm	16	62
2010	32.1 °C29 August 2010	-5.6 °C27 January 2010	14.1 °C	2,583 mm	36	40
2009	31.1 °C12 August 2009	-6.6 °C16 January 2009	13.8 °C	2,161 mm	1	30
2008	31.9 °C13 August 2008	-7.1 °C17 February 2008	13.9 °C	1,863 mm	18	45
2007	31.7 °C14 August 2007	-4.1 °C7 March 2007	14.1 °C	1,931 mm	16	21
2006	31.8 °C19 August 2006	-6.2 °C6 January 2006	13.7 °C	2,258 mm	13	48
2005	31.2 °C3 August 2005	-7.4 °C27 February 2005	13.6 °C	2,049 mm	11	56
2004	31.6 °C8 July 2004	-4.4 °C7 March 2004	14.5 °C	2,508 mm	13	37
2003	31.0 °C13 September 2003	-6.5 °C16 January 2003	13.4 °C	2,268 mm	8	46
2002	32.2 °C7 August 2002	-5.9 °C25 February 2002	13.7 °C	2,353 mm	17	38
2001	31.3 °C1 August 2001	-7.8 °C16 January 2001	13.4 °C	2,102 mm	10	64
2000	31.9 °C23 July 2000	-8.1 °C30 December 2000	13.6 °C	2,023 mm	16	59
1999	31.6 °C7 August 1999	-8.8 °C9 January 1999	13.8 °C	2,253 mm	16	53
1998	31.1 °C3 July 1998	-4.1 °C30 January 1998	14.5 °C	2,653 mm	2	30
1997	31.6 °C11 August 1997	-6.5 °C5 January 1997	13.3 °C	2,462 mm	6	52
1996	32.2 °C19 July 1996	-8.1 °C20 February 1996	12.5 °C	2,181 mm	11	71
1995	32.5 °C27 August 1995	-8.3 °C28 December 1995	12.7 °C	2,481 mm	19	60
1994	32.4 °C1 August 1994	-8.8 °C17 December 1994	14.1 °C	1,659 mm	29	58
1993	29.7 °C25 August 1993	-8.2 °C23 January 1993	12.9 °C	2,731 mm	0	42
1992	30.7 °C30 July 1992	-6.3 °C9 February 1992	13.4 °C	1,844 mm	6	40
1991	31.6 °C23 July 1991	-4.7 °C24 January 1991	13.7 °C	2,531 mm	6	38
1990	31.4 °C21 July 1990	-8.8 °C27 January 1990	14.2 °C	2,212 mm	15	36
1989	31.0 °C27 July 1989	-4.6 °C13 February 1989	13.6 °C	2,440 mm	4	26
1988	29.9 °C11 August 1988	-7.0 °C8 February 1988	12.5 °C	2,459 mm	0	59
1987	31.3 °C30 August 1987	-8.4 °C2 February 1987	13.5 °C	1,905 mm	4	43
1986	31.3 °C30 July 1986	-5.9 °C8 February 1986	12.4 °C	2,115 mm	8	65
1985	31.4 °C1 September 1985	-7.2 °C16 December 1985	13.1 °C	2,849 mm	20	56
1984	31.3 °C12 August 1984	-7.5 °C26 December 1984	12.5 °C	1,880 mm	11	77
1983	31.3 °C6 August 1983	-5.9 °C21 January 1983	13.0 °C	2,776 mm	9	65
1982	29.9 °C13 August 1982	-8.4 °C18 January 1982	13.1 °C	2,225 mm	0	51
1981	31.2 °C1 August 1981	-5.8 °C26 February 1981	12.4 °C	2,288 mm	10	60
1980	30.1 °C21 July 1980	-6.5 °C8 January 1980	12.6 °C	2,941 mm	1	53
1979	31.3 °C17 August 1979	-6.4 °C3 March 1979	13.7 °C	2,711 mm	6	41
1978	31.8 °C29 July 1978	-8.1 °C16 February 1978	13.5 °C	2,173 mm	31	59
1977	32.2 °C4 August 1977	-6.9 °C29 December 1977	13.3 °C	2,251 mm	9	60
1976	30.6 °C23 August 1976	-5.7 °C16 January 1976	12.5 °C	2,975 mm	1	59
1975	31.7 °C31 July 1975	-7.3 °C18 February 1975	13.3 °C	2,643 mm	16	65
1974	30.3 °C30 July 1974	-4.7 °C27 February 1974	12.6 °C	2,453 mm	1	62
1973	30.9 °C12 August 1973	-7.9 °C9 February 1973	12.9 °C	2,150 mm	9	71
1972	31.5 °C6 August 1972	-7.7 °C2 March 1972	13.3 °C	3,392 mm	7	43
1971	30.9 °C3 August 1971	-9.3 °C2 February 1971	12.5 °C	2,806 mm	10	69
1970	30.7 °C2 September 1970	-6.7 °C15 January 1970	12.5 °C	2,420 mm	7	81
1969	30.2 °C22 August 1969	-7.2 °C1 March 1969	12.6 °C	2,704 mm	2	73
1968	31.5 °C16 August 1968	-3.4 °C29 January 1968	12.8 °C	2,376 mm	5	55
1967	31.4 °C10 August 1967	-8.7 °C14 February 1967	12.9 °C	2,424 mm	9	68
1966	30.1 °C10 August 1966	-9.0 °C29 December 1966	12.3 °C	2,588 mm	1	67
1965	29.9 °C5 August 1965	-7.6 °C24 February 1965	11.6 °C	2,915 mm	0	82
1964	32.0 °C16 August 1964	-6.0 °C28 January 1964	13.5 °C	2,428 mm	22	54
1963	30.6 °C26 July 1963	-5.9 °C28 December 1963	12.9 °C	2,563 mm	5	64
1962	32.1 °C8 August 1962	-6.7 °C14 February 1962	13.1 °C	2,260 mm	14	48
1961	31.7 °C25 August 1961	-7.6 °C13 January 1961	13.7 °C	2,566 mm	22	63
1960	31.9 °C7 August 1960	-8.1 °C12 February 1960	13.4 °C	2,151 mm	13	53
1959	31.3 °C28 August 1959	-7.7 °C6 January 1959	13.9 °C	2,520 mm	10	39
1958	31.6 °C31 July 1958	-10.4 °C4 January 1958	13.3 °C	2,297 mm	4	47
1957	30.6 °C29 July 1957	-6.8 °C9 January 1957	12.6 °C	2,475 mm	5	65
1956	31.5 °C16 August 1956	-6.5 °C8 January 1956	12.6 °C	2,677 mm	9	68
1955	31.6 °C30 July 1955	-5.0 °C28 January 1955	13.5 °C	2,404 mm	13	41
1954	31.5 °C17 August 1954	-7.2 °C27 January 1954	13.2 °C	2,068 mm	6	49
1953	30.7 °C17 August 1953	-6.9 °C3 January 1953	12.8 °C	2,955 mm	6	48
1952	29.8 °C3 August 1952	-8.1 °C9 January 1952	11.9 °C	2,413 mm	0	78
1951	31.4 °C18 August 1951	-7.6 °C16 January 1951	12.1 °C	1,899 mm	5	68
1950	29.5 °C19 August 1950	-8.3 °C22 February 1950	12.4 °C	1,962 mm	0	77
1949	29.8 °C15 August 1949	-7.6 °C4 March 1949	12.1 °C	1,954 mm	0	66
1948	29.0 °C16 August 1948	-6.3 °C3 March 1948	12.7 °C	1,922 mm	0	58
1947	30.1 °C14 August 1947	-10.3 °C29 January 1947	11.1 °C	2,070 mm	1	94
1946	29.7 °C21 August 1946	-8.2 °C11 March 1946	12.3 °C	1,814 mm	0	84
1945	29.9 °C3 August 1945	-7.3 °C26 January 1945	11.5 °C	2,944 mm	0	96
1944	29.4 °C4 August 1944	-9.7 °C4 January 1944	12.0 °C	1,784 mm	0	100
1943	29.3 °C30 August 1943	-9.1 °C30 January 1943	11.6 °C	1,502 mm	0	89
1942	30.7 °C14 August 1942	-9.9 °C14 February 1942	12.1 °C	1,513 mm	6	77
1941	28.8 °C7 August 1941	-9.2 °C9 February 1941	11.9 °C	2,066 mm	0	80
1940	29.8 °C24 July 1940	-9.1 °C28 January 1940	11.6 °C	1,786 mm	0	95

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

17.6 °C

+1.5 °C

Hot days (≥ 30 °C)

48 d/yr

+37

Frost days (< 0 °C)

28 d/yr

-27

Annual rainfall

2295 mm

-37 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	5.0 °C	+0.6 °C	230 mm	+21 mm
Feb	3.8 °C	-0.9 °C	207 mm	+46 mm
Mar	8.8 °C	+0.4 °C	144 mm	-16 mm
Apr	15.6 °C	+1.0 °C	133 mm	-24 mm
May	20.0 °C	+0.9 °C	179 mm	+12 mm
Jun	24.8 °C	+2.2 °C	230 mm	+2 mm
Jul	30.3 °C	+3.8 °C	51 mm	-238 mm
Aug	30.1 °C	+2.0 °C	277 mm	+101 mm
Sep	27.6 °C	+3.2 °C	267 mm	+42 mm
Oct	20.8 °C	+1.9 °C	203 mm	+36 mm
Nov	14.4 °C	+0.9 °C	145 mm	-25 mm
Dec	9.4 °C	+1.8 °C	230 mm	+7 mm

The year's extremes

Hottest day

33.0 °C

26 Jul 2025

Coldest day

-4.4 °C

27 Dec 2025

Wettest day

81.1 mm

10 Aug 2025

Windiest day

40.8 km/h

10 May 2025

Strongest gust

91.4 km/h

17 May 2025

Hottest feels-like

38.7 °C

26 Jul 2025

Coldest feels-like

-9.4 °C

5 Feb 2025

Snowiest day

11.7 cm

5 Feb 2025

Sunniest day

14.0 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 Iijima?

Iijima has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 2,332 mm of precipitation per year.

What is the hottest day ever recorded in Iijima?

The hottest day measured in Iijima between 1940 and 2025 was 1 August 2022, reaching 33.7 °C.

What is the coldest day in Iijima?

The coldest day measured in Iijima between 1940 and 2025 was 4 January 1958, at -10.4 °C.

Does it snow in Iijima?

Yes. Iijima gets on average 188.5 cm of snow per year and has around 55 frost days.

Has the climate of Iijima warmed?

Yes: Iijima warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Iijima?

The wettest day measured in Iijima between 1940 and 2025 was 10 July 2002, with 150 mm of rain in 24 hours.

What was the windiest day in Iijima?

The windiest day measured in Iijima between 1940 and 2025 was 16 September 1961, with winds reaching 72.6 km/h.

What is the warmest month in Iijima?

The warmest month in Iijima is August (25.2 °C on average); the coldest is January (1.9 °C).

How much does it rain in Iijima?

Iijima receives on average 2,332 mm of precipitation per year, spread over about 203 rainy days.

Is it sunny in Iijima?

Iijima gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.

What is the biggest single-day snowfall in Iijima?

The heaviest 24-hour snowfall measured in Iijima between 1940 and 2025 was 12 March 1969, with 20.5 cm.

Are there tropical nights in Iijima?

Yes: Iijima has on average 67 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Iijima?

In Iijima, between 1940 and 2025, the highest apparent temperature reached 39.9 °C on 3 August 2024, and the lowest was -14.9 °C on 4 January 1958.

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