Ibi climate — normals and trends

Q: What is the climate of Ibi?

Ibi has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.0 °C and it receives 2,357 mm of precipitation per year.

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

The hottest day measured in Ibi between 1940 and 2025 was 5 August 2018, reaching 36.5 °C.

Q: What is the coldest day in Ibi?

The coldest day measured in Ibi between 1940 and 2025 was 14 February 1942, at -13.3 °C.

Q: Does it snow in Ibi?

Yes. Ibi gets on average 64.5 cm of snow per year and has around 66 frost days.

Q: Has the climate of Ibi warmed?

Yes: Ibi warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Ibi?

The wettest day measured in Ibi between 1940 and 2025 was 25 June 1985, with 182 mm of rain in 24 hours.

Q: What was the windiest day in Ibi?

The windiest day measured in Ibi between 1940 and 2025 was 4 September 2018, with winds reaching 56.5 km/h.

Q: What is the warmest month in Ibi?

The warmest month in Ibi is August (25.0 °C on average); the coldest is January (1.4 °C).

Q: How much does it rain in Ibi?

Ibi receives on average 2,357 mm of precipitation per year, spread over about 180 rainy days.

Q: Is it sunny in Ibi?

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

Ibi (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.0 °C and it receives 2,357 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 (25.0 °C on average) and the coldest is January (1.4 °C). Rainfall peaks in July.

Ibi averages 66 frost days, 22 hot days (≥ 30 °C) and 180 rainy days per year.

Ibi has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.

The number of frost days there went from about 94 to 38 per year over the period.

The hottest day of the period reached 36.5 °C (on 5 August 2018) and the coldest -13.3 °C (on 14 February 1942).

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

IbiGifu

coords: 35.48°, 136.57°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJulyDriest monthJanuary

Mean daily temperature

13.0°C

Average daily high

17.1°C

Average daily low

9.5°C

Annual rainfall

2,357mm

Sunshine / day

8.6h

Mean relative humidity

77%

Average peak wind

13.4km/h

Seasonal range

23.6°C

Frost days (< 0 °C)

66 d/yr

Hot days (≥ 30 °C)

22 d/yr

Rainy days (≥ 1 mm)

180 d/yr

Annual snowfall

64.5 cm

Average feels-like high

16.6 °C

Average feels-like low

8.3 °C

Average peak gust

39.2 km/h

Tropical nights (≥ 20 °C)

62 d/yr

Solar radiation

14.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.9 °C

since 1940

+0.3 °C per decade · r² = 0.68 · 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

36.5 °C

5 August 2018

Coldest day

-13.3 °C

14 February 1942

Wettest day

182 mm

25 June 1985

Windiest day

56.5 km/h

4 September 2018

Strongest gust

184.7 km/h

26 September 1959

Hottest feels-like

42.6 °C

29 July 2025

Coldest feels-like

-18.1 °C

14 February 1942

Snowiest day

25.1 cm

15 February 1968

Sunniest day

14.0 h

13 June 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.4 °C29 July 2025	-4.7 °C12 February 2025	14.5 °C	2,204 mm	70	56
2024	35.5 °C7 July 2024	-2.9 °C21 December 2024	15.4 °C	2,570 mm	62	28
2023	35.1 °C27 July 2023	-7.6 °C26 January 2023	15.1 °C	2,461 mm	56	32
2022	34.4 °C2 August 2022	-4.6 °C2 January 2022	14.6 °C	2,158 mm	39	57
2021	34.2 °C8 August 2021	-8.0 °C10 January 2021	14.7 °C	2,825 mm	27	39
2020	34.6 °C21 August 2020	-3.3 °C31 December 2020	14.8 °C	2,631 mm	37	15
2019	35.1 °C2 August 2019	-2.5 °C15 February 2019	14.8 °C	2,004 mm	33	21
2018	36.5 °C5 August 2018	-7.6 °C6 February 2018	14.6 °C	2,794 mm	43	51
2017	33.2 °C24 August 2017	-4.5 °C26 January 2017	13.7 °C	2,104 mm	30	47
2016	33.8 °C8 August 2016	-6.8 °C26 January 2016	14.8 °C	2,231 mm	36	33
2015	34.8 °C1 August 2015	-4.8 °C12 March 2015	14.5 °C	2,449 mm	29	30
2014	33.0 °C25 July 2014	-4.6 °C22 December 2014	13.7 °C	2,263 mm	14	59
2013	33.7 °C11 July 2013	-5.1 °C17 February 2013	13.8 °C	2,126 mm	35	54
2012	34.2 °C28 July 2012	-8.3 °C19 February 2012	13.3 °C	2,175 mm	30	67
2011	33.4 °C10 August 2011	-5.4 °C31 January 2011	13.6 °C	2,659 mm	32	74
2010	34.4 °C22 July 2010	-3.7 °C17 January 2010	14.1 °C	2,530 mm	40	45
2009	31.9 °C17 August 2009	-3.3 °C25 January 2009	14.0 °C	2,349 mm	10	33
2008	33.5 °C26 July 2008	-4.0 °C25 February 2008	13.9 °C	1,768 mm	32	46
2007	34.3 °C16 August 2007	-3.1 °C5 February 2007	14.1 °C	1,879 mm	21	23
2006	34.2 °C15 August 2006	-6.6 °C9 January 2006	13.8 °C	2,239 mm	30	46
2005	33.0 °C18 July 2005	-5.1 °C16 December 2005	13.6 °C	1,638 mm	29	64
2004	33.3 °C30 July 2004	-7.9 °C11 February 2004	14.4 °C	2,594 mm	30	44
2003	32.1 °C24 August 2003	-6.5 °C7 February 2003	13.5 °C	2,644 mm	16	55
2002	33.8 °C6 August 2002	-6.1 °C7 January 2002	13.6 °C	2,113 mm	30	48
2001	34.2 °C1 August 2001	-8.7 °C16 January 2001	13.4 °C	1,966 mm	30	73
2000	33.6 °C23 July 2000	-8.3 °C11 February 2000	13.5 °C	2,318 mm	34	66
1999	32.6 °C23 July 1999	-7.3 °C18 January 1999	13.7 °C	2,340 mm	14	67
1998	33.8 °C3 July 1998	-6.8 °C30 January 1998	14.5 °C	2,544 mm	21	43
1997	32.1 °C2 August 1997	-6.2 °C5 January 1997	13.2 °C	2,378 mm	19	66
1996	33.1 °C18 July 1996	-9.3 °C20 February 1996	12.5 °C	2,204 mm	25	85
1995	34.7 °C19 August 1995	-7.4 °C28 December 1995	12.8 °C	2,194 mm	37	73
1994	34.5 °C8 August 1994	-4.4 °C25 January 1994	14.3 °C	1,613 mm	45	64
1993	30.2 °C26 August 1993	-5.3 °C15 February 1993	12.9 °C	2,917 mm	3	50
1992	32.7 °C31 July 1992	-3.9 °C6 February 1992	13.5 °C	1,907 mm	18	43
1991	33.2 °C23 July 1991	-6.5 °C26 February 1991	13.7 °C	2,692 mm	16	53
1990	33.1 °C17 July 1990	-6.5 °C26 January 1990	14.2 °C	2,474 mm	33	40
1989	30.7 °C3 August 1989	-2.8 °C16 January 1989	13.7 °C	2,583 mm	10	26
1988	31.9 °C9 July 1988	-6.1 °C8 February 1988	12.6 °C	2,318 mm	8	73
1987	32.1 °C29 July 1987	-6.8 °C28 February 1987	13.5 °C	2,083 mm	22	53
1986	32.7 °C28 July 1986	-8.5 °C13 January 1986	12.5 °C	2,116 mm	16	68
1985	32.9 °C30 July 1985	-9.1 °C31 January 1985	12.9 °C	2,586 mm	25	66
1984	33.5 °C12 August 1984	-8.8 °C12 February 1984	12.3 °C	1,819 mm	27	93
1983	33.9 °C15 August 1983	-8.6 °C13 February 1983	13.0 °C	2,515 mm	24	69
1982	31.0 °C7 August 1982	-9.0 °C31 January 1982	13.0 °C	2,353 mm	3	61
1981	32.5 °C17 July 1981	-8.4 °C28 February 1981	12.1 °C	2,165 mm	17	75
1980	32.8 °C21 July 1980	-7.8 °C17 February 1980	12.3 °C	2,964 mm	2	82
1979	33.2 °C1 August 1979	-8.3 °C20 January 1979	13.6 °C	2,664 mm	19	56
1978	34.0 °C12 August 1978	-7.2 °C1 February 1978	13.2 °C	2,261 mm	39	72
1977	33.7 °C4 August 1977	-8.6 °C29 December 1977	13.2 °C	2,527 mm	20	74
1976	32.1 °C22 August 1976	-10.3 °C30 December 1976	12.4 °C	3,078 mm	7	70
1975	32.4 °C3 August 1975	-7.0 °C15 January 1975	13.0 °C	2,952 mm	19	78
1974	31.9 °C2 August 1974	-6.4 °C27 January 1974	12.4 °C	2,843 mm	16	77
1973	33.0 °C10 August 1973	-7.5 °C31 December 1973	12.8 °C	2,231 mm	26	83
1972	33.4 °C5 August 1972	-5.3 °C25 February 1972	13.2 °C	3,678 mm	19	54
1971	32.6 °C29 July 1971	-7.5 °C11 March 1971	12.5 °C	2,888 mm	15	75
1970	33.7 °C22 July 1970	-8.5 °C15 January 1970	12.2 °C	2,518 mm	16	96
1969	32.4 °C13 August 1969	-8.0 °C21 December 1969	12.4 °C	2,602 mm	12	82
1968	32.2 °C19 July 1968	-8.8 °C21 February 1968	12.5 °C	2,552 mm	13	78
1967	32.3 °C4 August 1967	-10.5 °C17 January 1967	12.8 °C	2,324 mm	31	86
1966	31.0 °C7 August 1966	-8.2 °C25 January 1966	11.7 °C	2,796 mm	9	92
1965	31.7 °C21 August 1965	-10.1 °C12 January 1965	11.2 °C	2,437 mm	7	107
1964	33.1 °C4 August 1964	-6.5 °C19 February 1964	13.5 °C	2,028 mm	35	67
1963	32.2 °C18 July 1963	-13.2 °C16 January 1963	12.5 °C	2,497 mm	17	80
1962	33.3 °C22 July 1962	-7.6 °C27 January 1962	12.9 °C	2,427 mm	19	68
1961	33.4 °C13 August 1961	-8.4 °C21 January 1961	13.6 °C	2,766 mm	29	75
1960	34.3 °C1 August 1960	-7.1 °C26 January 1960	13.4 °C	2,270 mm	23	62
1959	35.0 °C2 August 1959	-7.7 °C18 January 1959	13.8 °C	2,729 mm	27	45
1958	32.3 °C31 July 1958	-9.9 °C4 January 1958	13.1 °C	2,495 mm	17	59
1957	33.5 °C1 August 1957	-6.4 °C14 January 1957	12.5 °C	2,807 mm	9	74
1956	34.0 °C3 August 1956	-7.7 °C3 February 1956	12.5 °C	2,662 mm	26	86
1955	33.6 °C29 July 1955	-7.8 °C9 January 1955	13.4 °C	2,348 mm	29	61
1954	32.6 °C8 August 1954	-6.8 °C23 February 1954	13.1 °C	2,378 mm	19	60
1953	33.7 °C27 July 1953	-7.7 °C9 February 1953	12.8 °C	2,886 mm	20	59
1952	31.2 °C2 August 1952	-8.1 °C19 January 1952	11.5 °C	2,267 mm	5	96
1951	32.7 °C28 July 1951	-9.5 °C21 February 1951	11.6 °C	2,046 mm	20	83
1950	30.7 °C8 July 1950	-7.4 °C8 January 1950	12.0 °C	1,980 mm	2	94
1949	31.1 °C6 August 1949	-7.3 °C10 January 1949	11.6 °C	2,138 mm	2	90
1948	30.1 °C19 August 1948	-5.8 °C3 January 1948	12.3 °C	2,108 mm	1	80
1947	32.1 °C13 August 1947	-12.0 °C23 February 1947	10.8 °C	2,029 mm	12	106
1946	33.1 °C17 July 1946	-8.1 °C12 January 1946	12.0 °C	1,767 mm	12	102
1945	30.8 °C8 August 1945	-10.5 °C18 January 1945	11.0 °C	2,620 mm	4	106
1944	30.6 °C5 August 1944	-8.9 °C3 February 1944	11.7 °C	1,828 mm	4	107
1943	31.1 °C9 August 1943	-12.7 °C30 January 1943	11.4 °C	1,418 mm	4	105
1942	33.4 °C2 August 1942	-13.3 °C14 February 1942	11.7 °C	1,408 mm	20	96
1941	30.6 °C9 August 1941	-11.9 °C12 February 1941	11.6 °C	2,238 mm	3	91
1940	30.5 °C24 July 1940	-10.4 °C19 February 1940	11.1 °C	1,727 mm	1	106

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

18.8 °C

+1.7 °C

Hot days (≥ 30 °C)

70 d/yr

+48

Frost days (< 0 °C)

56 d/yr

-10

Annual rainfall

2204 mm

-153 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	5.9 °C	+0.9 °C	49 mm	-37 mm
Feb	4.0 °C	-1.8 °C	68 mm	-27 mm
Mar	10.9 °C	+0.9 °C	144 mm	-6 mm
Apr	17.9 °C	+1.8 °C	186 mm	-4 mm
May	21.7 °C	+1.2 °C	244 mm	+28 mm
Jun	26.4 °C	+2.6 °C	316 mm	+7 mm
Jul	31.6 °C	+4.0 °C	180 mm	-202 mm
Aug	32.0 °C	+3.0 °C	226 mm	-26 mm
Sep	28.5 °C	+3.3 °C	336 mm	+45 mm
Oct	21.1 °C	+1.4 °C	286 mm	+107 mm
Nov	14.8 °C	+0.8 °C	58 mm	-57 mm
Dec	9.2 °C	+1.1 °C	112 mm	+20 mm

The year's extremes

Hottest day

35.4 °C

29 Jul 2025

Coldest day

-4.7 °C

12 Feb 2025

Wettest day

88.2 mm

5 Sep 2025

Windiest day

27.1 km/h

30 Jan 2025

Strongest gust

73.8 km/h

19 Mar 2025

Hottest feels-like

42.6 °C

29 Jul 2025

Coldest feels-like

-9.5 °C

8 Feb 2025

Snowiest day

3.9 cm

7 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 Ibi?

Ibi has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.0 °C and it receives 2,357 mm of precipitation per year.

What is the hottest day ever recorded in Ibi?

The hottest day measured in Ibi between 1940 and 2025 was 5 August 2018, reaching 36.5 °C.

What is the coldest day in Ibi?

The coldest day measured in Ibi between 1940 and 2025 was 14 February 1942, at -13.3 °C.

Does it snow in Ibi?

Yes. Ibi gets on average 64.5 cm of snow per year and has around 66 frost days.

Has the climate of Ibi warmed?

Yes: Ibi warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Ibi?

The wettest day measured in Ibi between 1940 and 2025 was 25 June 1985, with 182 mm of rain in 24 hours.

What was the windiest day in Ibi?

The windiest day measured in Ibi between 1940 and 2025 was 4 September 2018, with winds reaching 56.5 km/h.

What is the warmest month in Ibi?

The warmest month in Ibi is August (25.0 °C on average); the coldest is January (1.4 °C).

How much does it rain in Ibi?

Ibi receives on average 2,357 mm of precipitation per year, spread over about 180 rainy days.

Is it sunny in Ibi?

Ibi 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 Ibi?

The heaviest 24-hour snowfall measured in Ibi between 1940 and 2025 was 15 February 1968, with 25.1 cm.

Are there tropical nights in Ibi?

Yes: Ibi has on average 62 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Ibi?

In Ibi, between 1940 and 2025, the highest apparent temperature reached 42.6 °C on 29 July 2025, and the lowest was -18.1 °C on 14 February 1942.

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