Ichinoseki climate — normals and trends

Q: What is the climate of Ichinoseki?

Ichinoseki has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.8 °C and it receives 1,177 mm of precipitation per year.

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

The hottest day measured in Ichinoseki between 1940 and 2025 was 5 August 2015, reaching 35.6 °C.

Q: What is the coldest day in Ichinoseki?

The coldest day measured in Ichinoseki between 1940 and 2025 was 26 January 1945, at -20.9 °C.

Q: Does it snow in Ichinoseki?

Yes. Ichinoseki gets on average 75.3 cm of snow per year and has around 107 frost days.

Q: Has the climate of Ichinoseki warmed?

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

Q: What is the wettest day in Ichinoseki?

The wettest day measured in Ichinoseki between 1940 and 2025 was 15 September 1947, with 143 mm of rain in 24 hours.

Q: What was the windiest day in Ichinoseki?

The windiest day measured in Ichinoseki between 1940 and 2025 was 31 March 1979, with winds reaching 48.1 km/h.

Q: What is the warmest month in Ichinoseki?

The warmest month in Ichinoseki is August (23.5 °C on average); the coldest is January (-1.2 °C).

Q: How much does it rain in Ichinoseki?

Ichinoseki receives on average 1,177 mm of precipitation per year, spread over about 144 rainy days.

Q: Is it sunny in Ichinoseki?

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

Ichinoseki has a hot-summer humid continental climate, averaging 10.8 °C annually with 1,177 mm of rain per year.

Climate normals · ERA5

IchinosekiIwate

coords: 38.92°, 141.13°
period: 1940–2025 · 86 yrs

DfaHot-summer humid continentalWarmest monthAugustColdest monthJanuaryWettest monthSeptemberDriest monthJanuary

The normals for this period

The average of every indicator across the whole window: temperature, water, sky, wind and notable days.

Mean daily temperature

10.8°C

Average daily high

14.9°C

Average daily low

6.9°C

Annual rainfall

1,177mm

Sunshine / day

8.3h

Mean relative humidity

75%

Average peak wind

15.7km/h

Seasonal range

24.7°C

Frost days (< 0 °C)

107 d/yr

Hot days (≥ 30 °C)

12 d/yr

Rainy days (≥ 1 mm)

144 d/yr

Annual snowfall

75.3 cm

Average feels-like high

13.5 °C

Average feels-like low

5.1 °C

Average peak gust

40.8 km/h

Tropical nights (≥ 20 °C)

35 d/yr

Solar radiation

13.7 MJ/m²

Has the climate changed?

What the yearly averages say about warming here, and whether the slope is statistically solid.

+2.9 °C

since 1940

+0.3 °C per decade · r² = 0.66 · 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).

Climate month by month

How an average year unfolds: when it rains, when it turns hot, when the sun is out.

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

The most extreme days ever measured here, then the year-by-year detail.

Hottest day

35.6 °C

5 August 2015

Coldest day

-20.9 °C

26 January 1945

Wettest day

143 mm

15 September 1947

Windiest day

48.1 km/h

31 March 1979

Strongest gust

132.1 km/h

23 August 1981

Hottest feels-like

41.6 °C

4 August 2021

Coldest feels-like

-26.1 °C

26 January 1945

Snowiest day

36.3 cm

18 January 2016

Sunniest day

14.7 h

13 June 1986

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	34.4 °C22 July 2025	-6.8 °C8 February 2025	12.7 °C	1,127 mm	47	95
2024	33.5 °C22 July 2024	-7.5 °C24 February 2024	13.3 °C	1,264 mm	26	86
2023	34.8 °C29 July 2023	-10.1 °C25 January 2023	13.5 °C	1,194 mm	52	76
2022	33.9 °C31 July 2022	-7.5 °C24 December 2022	12.2 °C	1,279 mm	22	94
2021	34.2 °C4 August 2021	-16.5 °C9 January 2021	12.4 °C	1,243 mm	15	78
2020	34.8 °C11 August 2020	-7.5 °C16 December 2020	12.4 °C	1,189 mm	18	70
2019	33.4 °C3 August 2019	-4.4 °C8 February 2019	12.3 °C	1,241 mm	22	92
2018	34.7 °C22 August 2018	-8.9 °C25 January 2018	12.3 °C	1,066 mm	27	88
2017	33.7 °C14 July 2017	-6.9 °C15 January 2017	11.7 °C	1,076 mm	11	97
2016	32.1 °C5 August 2016	-8.3 °C20 January 2016	12.2 °C	1,124 mm	11	83
2015	35.6 °C5 August 2015	-4.9 °C17 January 2015	12.5 °C	1,127 mm	18	62
2014	34.0 °C5 August 2014	-11.5 °C14 February 2014	11.5 °C	1,212 mm	14	100
2013	33.2 °C17 August 2013	-12.2 °C18 January 2013	11.4 °C	1,320 mm	15	109
2012	33.7 °C23 August 2012	-17.0 °C3 February 2012	11.5 °C	1,049 mm	35	108
2011	33.9 °C15 August 2011	-12.0 °C3 January 2011	11.4 °C	1,121 mm	24	108
2010	34.1 °C5 August 2010	-9.4 °C28 December 2010	12.1 °C	1,298 mm	36	91
2009	31.3 °C26 June 2009	-6.5 °C24 February 2009	11.7 °C	1,230 mm	4	85
2008	31.9 °C3 August 2008	-11.3 °C27 January 2008	11.6 °C	916 mm	4	91
2007	34.9 °C15 August 2007	-4.0 °C27 December 2007	11.9 °C	1,073 mm	20	95
2006	32.0 °C3 August 2006	-9.4 °C4 February 2006	11.3 °C	1,305 mm	7	92
2005	34.2 °C5 August 2005	-14.4 °C6 March 2005	11.0 °C	970 mm	11	111
2004	32.3 °C9 August 2004	-7.6 °C31 December 2004	11.9 °C	1,317 mm	9	87
2003	31.4 °C23 August 2003	-14.7 °C11 March 2003	11.0 °C	1,281 mm	1	86
2002	33.5 °C1 August 2002	-12.0 °C1 February 2002	11.4 °C	1,274 mm	15	87
2001	33.2 °C23 July 2001	-18.8 °C17 January 2001	10.7 °C	1,004 mm	11	107
2000	33.5 °C26 August 2000	-11.6 °C1 March 2000	11.6 °C	1,273 mm	15	105
1999	33.9 °C31 July 1999	-9.9 °C4 February 1999	11.8 °C	1,363 mm	20	102
1998	31.9 °C3 July 1998	-15.2 °C30 January 1998	11.4 °C	1,578 mm	3	106
1997	32.9 °C9 August 1997	-12.8 °C9 January 1997	11.3 °C	1,130 mm	10	89
1996	32.8 °C26 July 1996	-14.9 °C2 February 1996	10.5 °C	1,131 mm	9	112
1995	33.2 °C30 July 1995	-12.0 °C17 January 1995	11.2 °C	1,165 mm	16	96
1994	35.0 °C14 August 1994	-15.1 °C20 December 1994	11.8 °C	991 mm	26	108
1993	29.4 °C25 August 1993	-11.6 °C9 March 1993	10.6 °C	1,340 mm	0	96
1992	33.0 °C30 July 1992	-13.1 °C23 March 1992	11.1 °C	1,002 mm	10	97
1991	30.6 °C23 July 1991	-13.2 °C24 February 1991	11.5 °C	1,440 mm	2	94
1990	32.9 °C15 August 1990	-15.8 °C27 January 1990	12.4 °C	1,252 mm	16	65
1989	30.8 °C8 August 1989	-12.7 °C26 January 1989	11.6 °C	1,137 mm	5	75
1988	31.6 °C4 August 1988	-14.1 °C15 February 1988	10.3 °C	1,169 mm	6	103
1987	32.0 °C23 July 1987	-15.4 °C7 December 1987	11.1 °C	1,037 mm	5	106
1986	33.7 °C30 July 1986	-15.8 °C7 February 1986	10.1 °C	993 mm	4	108
1985	33.7 °C1 September 1985	-18.8 °C27 January 1985	10.6 °C	994 mm	25	118
1984	34.0 °C12 August 1984	-16.8 °C25 December 1984	9.5 °C	1,026 mm	18	128
1983	34.0 °C7 August 1983	-14.2 °C23 January 1983	10.5 °C	1,246 mm	7	111
1982	30.0 °C22 August 1982	-14.0 °C9 February 1982	11.0 °C	1,173 mm	1	95
1981	32.7 °C1 August 1981	-14.5 °C15 January 1981	9.9 °C	1,150 mm	7	117
1980	29.9 °C22 July 1980	-13.8 °C17 February 1980	10.1 °C	1,408 mm	0	119
1979	32.0 °C1 August 1979	-10.8 °C29 January 1979	11.4 °C	1,486 mm	2	110
1978	33.8 °C25 July 1978	-17.5 °C17 February 1978	10.8 °C	969 mm	21	107
1977	32.1 °C31 July 1977	-14.1 °C14 January 1977	10.4 °C	1,389 mm	7	102
1976	30.0 °C31 July 1976	-14.2 °C30 December 1976	9.9 °C	1,459 mm	2	117
1975	33.1 °C2 August 1975	-14.3 °C17 February 1975	10.8 °C	1,135 mm	16	110
1974	30.8 °C4 August 1974	-13.5 °C29 December 1974	9.9 °C	1,346 mm	3	125
1973	33.6 °C18 August 1973	-7.2 °C13 January 1973	11.0 °C	825 mm	25	116
1972	32.0 °C17 August 1972	-13.4 °C24 January 1972	11.3 °C	1,718 mm	9	92
1971	32.2 °C29 July 1971	-13.6 °C10 January 1971	10.2 °C	1,393 mm	10	114
1970	34.1 °C25 July 1970	-13.7 °C28 February 1970	10.4 °C	968 mm	15	126
1969	31.7 °C4 August 1969	-15.2 °C2 March 1969	10.2 °C	1,254 mm	3	116
1968	32.4 °C20 July 1968	-15.5 °C17 February 1968	10.9 °C	1,264 mm	6	95
1967	32.3 °C10 August 1967	-20.1 °C11 January 1967	10.7 °C	1,372 mm	17	116
1966	30.9 °C28 July 1966	-17.0 °C31 January 1966	9.7 °C	1,504 mm	7	132
1965	29.9 °C5 August 1965	-11.2 °C9 February 1965	9.8 °C	928 mm	0	128
1964	32.5 °C16 August 1964	-11.1 °C24 January 1964	10.6 °C	1,481 mm	11	119
1963	31.1 °C31 July 1963	-15.1 °C25 January 1963	10.8 °C	1,091 mm	6	102
1962	34.0 °C1 August 1962	-12.5 °C27 January 1962	11.0 °C	1,160 mm	15	112
1961	32.6 °C30 July 1961	-14.3 °C20 January 1961	11.3 °C	1,181 mm	15	112
1960	34.2 °C8 August 1960	-15.0 °C23 January 1960	11.0 °C	1,159 mm	12	98
1959	31.5 °C30 July 1959	-12.6 °C18 December 1959	11.3 °C	1,381 mm	6	92
1958	31.4 °C17 July 1958	-10.1 °C4 January 1958	10.9 °C	1,627 mm	5	102
1957	31.8 °C23 August 1957	-14.4 °C1 March 1957	10.4 °C	1,142 mm	5	115
1956	32.0 °C29 July 1956	-12.8 °C11 February 1956	10.2 °C	1,275 mm	5	113
1955	34.2 °C2 August 1955	-11.2 °C17 January 1955	11.3 °C	1,348 mm	18	106
1954	32.4 °C15 August 1954	-8.7 °C1 February 1954	10.6 °C	1,068 mm	3	104
1953	31.9 °C12 August 1953	-15.3 °C3 January 1953	10.3 °C	1,083 mm	8	105
1952	30.3 °C25 July 1952	-19.9 °C10 January 1952	8.5 °C	1,060 mm	1	143
1951	31.1 °C8 August 1951	-18.6 °C22 January 1951	9.4 °C	937 mm	14	128
1950	32.4 °C23 July 1950	-19.9 °C6 January 1950	10.1 °C	1,003 mm	12	129
1949	31.8 °C9 August 1949	-11.5 °C29 December 1949	9.7 °C	914 mm	8	134
1948	30.7 °C28 July 1948	-13.9 °C1 February 1948	10.2 °C	948 mm	2	126
1947	30.9 °C14 August 1947	-18.6 °C24 December 1947	8.4 °C	1,294 mm	4	144
1946	31.3 °C21 July 1946	-17.2 °C19 December 1946	9.8 °C	849 mm	5	129
1945	31.7 °C6 August 1945	-20.9 °C26 January 1945	8.6 °C	1,421 mm	6	131
1944	31.3 °C5 August 1944	-15.7 °C28 January 1944	9.6 °C	869 mm	6	130
1943	30.3 °C5 August 1943	-15.1 °C21 February 1943	9.4 °C	613 mm	2	142
1942	32.4 °C15 August 1942	-20.8 °C21 February 1942	9.4 °C	861 mm	10	135
1941	29.0 °C19 August 1941	-15.6 °C27 January 1941	8.9 °C	1,202 mm	0	136
1940	30.0 °C20 July 1940	-19.1 °C28 January 1940	8.8 °C	943 mm	1	141

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and compare it with the normal: warmer, drier, more extreme?

Year

Across the whole year

Average daily high

17.0 °C

+2.1 °C

Hot days (≥ 30 °C)

47 d/yr

+35

Frost days (< 0 °C)

95 d/yr

-12

Annual rainfall

1127 mm

-50 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	4.6 °C	+1.9 °C	39 mm	-10 mm
Feb	4.4 °C	+0.9 °C	27 mm	-25 mm
Mar	9.7 °C	+2.2 °C	77 mm	-6 mm
Apr	14.9 °C	+0.9 °C	105 mm	+11 mm
May	19.3 °C	+0.4 °C	145 mm	+45 mm
Jun	26.3 °C	+4.4 °C	83 mm	-34 mm
Jul	30.5 °C	+4.9 °C	98 mm	-54 mm
Aug	30.1 °C	+2.8 °C	137 mm	-0 mm
Sep	25.9 °C	+2.7 °C	150 mm	-5 mm
Oct	18.1 °C	+0.5 °C	122 mm	+11 mm
Nov	12.2 °C	+0.8 °C	74 mm	+5 mm
Dec	6.6 °C	+1.2 °C	70 mm	+13 mm

The year's extremes

Hottest day

34.4 °C

22 Jul 2025

Coldest day

-6.8 °C

8 Feb 2025

Wettest day

56.3 mm

1 Nov 2025

Windiest day

37.7 km/h

1 Nov 2025

Strongest gust

94.3 km/h

1 Nov 2025

Hottest feels-like

40.9 °C

29 Jul 2025

Coldest feels-like

-11.6 °C

8 Feb 2025

Snowiest day

5.7 cm

17 Mar 2025

Sunniest day

14.5 h

18 Jun 2025

What was the weather like that day?

The weather actually measured on a given date, anywhere in the covered window.

Date

Climate at a glance

What these normals say about the place, in a few sentences, and the notions needed to read them.

Ichinoseki (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.8 °C and it receives 1,177 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 (23.5 °C on average) and the coldest is January (-1.2 °C). Rainfall peaks in September.

Ichinoseki averages 107 frost days, 12 hot days (≥ 30 °C) and 144 rainy days per year.

Ichinoseki 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 130 to 84 per year over the period.

The hottest day of the period reached 35.6 °C (on 5 August 2015) and the coldest -20.9 °C (on 26 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.

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Frequently asked questions

What is the climate of Ichinoseki?

Ichinoseki has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.8 °C and it receives 1,177 mm of precipitation per year.

What is the hottest day ever recorded in Ichinoseki?

The hottest day measured in Ichinoseki between 1940 and 2025 was 5 August 2015, reaching 35.6 °C.

What is the coldest day in Ichinoseki?

The coldest day measured in Ichinoseki between 1940 and 2025 was 26 January 1945, at -20.9 °C.

Does it snow in Ichinoseki?

Yes. Ichinoseki gets on average 75.3 cm of snow per year and has around 107 frost days.

Has the climate of Ichinoseki warmed?

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

What is the wettest day in Ichinoseki?

The wettest day measured in Ichinoseki between 1940 and 2025 was 15 September 1947, with 143 mm of rain in 24 hours.

What was the windiest day in Ichinoseki?

The windiest day measured in Ichinoseki between 1940 and 2025 was 31 March 1979, with winds reaching 48.1 km/h.

What is the warmest month in Ichinoseki?

The warmest month in Ichinoseki is August (23.5 °C on average); the coldest is January (-1.2 °C).

How much does it rain in Ichinoseki?

Ichinoseki receives on average 1,177 mm of precipitation per year, spread over about 144 rainy days.

Is it sunny in Ichinoseki?

Ichinoseki 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 Ichinoseki?

The heaviest 24-hour snowfall measured in Ichinoseki between 1940 and 2025 was 18 January 2016, with 36.3 cm.

Are there tropical nights in Ichinoseki?

Yes: Ichinoseki has on average 35 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Ichinoseki?

In Ichinoseki, between 1940 and 2025, the highest apparent temperature reached 41.6 °C on 4 August 2021, and the lowest was -26.1 °C on 26 January 1945.

These forecasts and records come from our own weather API. Developer documentation →