Kashiwazaki climate — normals and trends

Q: What is the climate of Kashiwazaki?

Kashiwazaki has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.0 °C and it receives 1,936 mm of precipitation per year.

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

The hottest day measured in Kashiwazaki between 1940 and 2025 was 14 August 2023, reaching 39.1 °C.

Q: What is the coldest day in Kashiwazaki?

The coldest day measured in Kashiwazaki between 1940 and 2025 was 17 January 1942, at -11.1 °C.

Q: Does it snow in Kashiwazaki?

Yes. Kashiwazaki gets on average 250.8 cm of snow per year and has around 71 frost days.

Q: Has the climate of Kashiwazaki warmed?

Yes: Kashiwazaki warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Kashiwazaki?

The wettest day measured in Kashiwazaki between 1940 and 2025 was 8 July 1964, with 183 mm of rain in 24 hours.

Q: What was the windiest day in Kashiwazaki?

The windiest day measured in Kashiwazaki between 1940 and 2025 was 16 September 1961, with winds reaching 63.6 km/h.

Q: What is the warmest month in Kashiwazaki?

The warmest month in Kashiwazaki is August (26.0 °C on average); the coldest is January (1.2 °C).

Q: How much does it rain in Kashiwazaki?

Kashiwazaki receives on average 1,936 mm of precipitation per year, spread over about 217 rainy days.

Q: Is it sunny in Kashiwazaki?

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

Kashiwazaki (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.0 °C and it receives 1,936 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 (26.0 °C on average) and the coldest is January (1.2 °C). Rainfall peaks in July.

Kashiwazaki averages 71 frost days, 32 hot days (≥ 30 °C) and 217 rainy days per year.

Kashiwazaki has warmed by +2.7 °C between 1940 and 2025, or +0.31 °C per decade. This trend is statistically significant.

The number of frost days there went from about 97 to 45 per year over the period.

The hottest day of the period reached 39.1 °C (on 14 August 2023) and the coldest -11.1 °C (on 17 January 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

KashiwazakiNiigata

coords: 37.37°, 138.55°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJulyDriest monthApril

Mean daily temperature

13.0°C

Average daily high

17.0°C

Average daily low

9.2°C

Annual rainfall

1,936mm

Sunshine / day

8.6h

Mean relative humidity

77%

Average peak wind

13.8km/h

Seasonal range

24.8°C

Frost days (< 0 °C)

71 d/yr

Hot days (≥ 30 °C)

32 d/yr

Rainy days (≥ 1 mm)

217 d/yr

Annual snowfall

250.8 cm

Average feels-like high

16.9 °C

Average feels-like low

7.9 °C

Average peak gust

34.1 km/h

Tropical nights (≥ 20 °C)

60 d/yr

Solar radiation

14.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.7 °C

since 1940

+0.3 °C per decade · r² = 0.67 · 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

39.1 °C

14 August 2023

Coldest day

-11.1 °C

17 January 1942

Wettest day

183 mm

8 July 1964

Windiest day

63.6 km/h

16 September 1961

Strongest gust

126.4 km/h

18 September 1945

Hottest feels-like

45.0 °C

24 August 2023

Coldest feels-like

-15.5 °C

17 January 1942

Snowiest day

42.6 cm

15 February 2014

Sunniest day

14.0 h

13 June 2008

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	36.7 °C1 August 2025	-5.5 °C19 January 2025	14.2 °C	2,111 mm	66	55
2024	37.4 °C23 August 2024	-8.9 °C9 January 2024	14.9 °C	2,109 mm	62	50
2023	39.1 °C14 August 2023	-6.7 °C23 February 2023	15.2 °C	1,874 mm	69	48
2022	37.3 °C24 June 2022	-5.3 °C6 January 2022	14.4 °C	1,985 mm	58	61
2021	36.4 °C3 August 2021	-8.7 °C21 January 2021	14.3 °C	2,059 mm	36	57
2020	37.1 °C3 September 2020	-7.4 °C10 February 2020	14.5 °C	2,325 mm	38	28
2019	37.9 °C14 August 2019	-6.2 °C15 February 2019	14.4 °C	2,054 mm	38	45
2018	38.5 °C29 July 2018	-9.8 °C15 January 2018	14.4 °C	1,692 mm	51	58
2017	37.1 °C7 August 2017	-5.4 °C18 December 2017	13.6 °C	2,161 mm	28	50
2016	34.5 °C4 September 2016	-8.5 °C8 February 2016	14.4 °C	1,865 mm	39	49
2015	38.5 °C13 July 2015	-6.1 °C21 January 2015	14.4 °C	1,620 mm	32	41
2014	36.4 °C5 August 2014	-9.7 °C12 February 2014	13.5 °C	1,855 mm	32	73
2013	35.2 °C31 August 2013	-7.6 °C12 March 2013	13.6 °C	2,132 mm	34	65
2012	36.7 °C4 August 2012	-9.0 °C25 December 2012	13.5 °C	1,848 mm	54	73
2011	36.9 °C20 July 2011	-7.0 °C14 January 2011	13.4 °C	1,797 mm	53	90
2010	35.9 °C5 August 2010	-7.0 °C4 February 2010	14.0 °C	1,998 mm	55	61
2009	35.0 °C15 July 2009	-9.7 °C22 February 2009	13.8 °C	1,704 mm	21	52
2008	34.8 °C3 August 2008	-7.1 °C22 February 2008	13.9 °C	1,658 mm	38	56
2007	37.9 °C12 August 2007	-6.3 °C5 February 2007	14.2 °C	1,582 mm	38	29
2006	38.7 °C19 August 2006	-6.1 °C14 March 2006	13.7 °C	1,911 mm	36	55
2005	35.2 °C21 June 2005	-6.9 °C16 December 2005	13.6 °C	1,823 mm	47	69
2004	37.7 °C5 July 2004	-7.0 °C11 February 2004	14.4 °C	2,092 mm	47	51
2003	35.4 °C13 September 2003	-6.6 °C3 January 2003	13.5 °C	1,644 mm	18	60
2002	36.5 °C1 September 2002	-4.5 °C25 February 2002	13.7 °C	2,006 mm	38	46
2001	34.1 °C15 July 2001	-5.1 °C12 March 2001	13.5 °C	1,845 mm	34	63
2000	37.4 °C30 July 2000	-9.3 °C27 January 2000	13.8 °C	1,888 mm	50	59
1999	37.9 °C10 August 1999	-5.9 °C5 February 1999	13.9 °C	2,054 mm	38	60
1998	34.9 °C27 July 1998	-5.6 °C23 February 1998	14.2 °C	2,189 mm	20	49
1997	36.7 °C9 August 1997	-5.3 °C14 January 1997	13.4 °C	1,910 mm	30	61
1996	35.7 °C14 August 1996	-6.6 °C21 February 1996	12.6 °C	1,876 mm	35	81
1995	35.1 °C24 July 1995	-7.2 °C3 January 1995	13.0 °C	1,912 mm	29	63
1994	37.9 °C14 August 1994	-5.5 °C7 March 1994	14.2 °C	1,503 mm	53	63
1993	33.0 °C25 July 1993	-4.0 °C23 January 1993	12.9 °C	2,043 mm	8	51
1992	35.4 °C18 August 1992	-7.2 °C16 January 1992	13.5 °C	1,628 mm	32	50
1991	35.7 °C19 August 1991	-4.7 °C14 February 1991	13.7 °C	2,088 mm	24	56
1990	37.4 °C23 August 1990	-7.9 °C21 January 1990	14.6 °C	1,607 mm	49	36
1989	34.8 °C27 July 1989	-4.3 °C16 January 1989	13.8 °C	1,855 mm	26	33
1988	33.9 °C10 August 1988	-8.4 °C7 January 1988	12.6 °C	2,090 mm	23	73
1987	35.9 °C31 August 1987	-7.6 °C2 February 1987	13.5 °C	1,563 mm	34	63
1986	36.7 °C29 August 1986	-6.6 °C20 January 1986	12.5 °C	1,809 mm	27	75
1985	37.3 °C30 August 1985	-8.9 °C16 December 1985	13.1 °C	2,109 mm	49	81
1984	36.3 °C16 August 1984	-5.4 °C15 March 1984	12.4 °C	1,739 mm	42	101
1983	35.0 °C14 August 1983	-6.3 °C15 February 1983	13.0 °C	2,149 mm	30	63
1982	34.8 °C28 August 1982	-6.2 °C31 January 1982	13.2 °C	1,837 mm	13	66
1981	35.2 °C30 July 1981	-5.3 °C27 February 1981	12.3 °C	2,114 mm	30	67
1980	34.3 °C11 September 1980	-5.8 °C2 January 1980	12.4 °C	2,212 mm	9	67
1979	35.0 °C27 August 1979	-7.0 °C29 January 1979	13.6 °C	2,181 mm	17	65
1978	37.6 °C2 August 1978	-9.1 °C17 February 1978	13.0 °C	1,880 mm	52	71
1977	35.3 °C4 August 1977	-6.8 °C5 January 1977	12.8 °C	1,897 mm	22	76
1976	33.8 °C25 July 1976	-8.0 °C21 February 1976	12.2 °C	2,416 mm	15	73
1975	34.8 °C5 August 1975	-7.4 °C5 January 1975	13.0 °C	2,073 mm	41	85
1974	34.0 °C2 September 1974	-5.4 °C21 January 1974	12.4 °C	2,046 mm	24	76
1973	35.9 °C18 August 1973	-6.9 °C17 January 1973	13.0 °C	1,808 mm	43	88
1972	35.0 °C25 July 1972	-7.5 °C23 February 1972	13.3 °C	2,307 mm	31	56
1971	35.9 °C6 August 1971	-7.4 °C11 January 1971	12.3 °C	2,239 mm	22	82
1970	34.9 °C2 September 1970	-6.8 °C5 January 1970	12.3 °C	1,932 mm	36	106
1969	33.6 °C4 August 1969	-8.5 °C31 December 1969	12.3 °C	2,095 mm	25	92
1968	35.2 °C27 July 1968	-6.5 °C24 February 1968	12.9 °C	1,911 mm	29	73
1967	33.8 °C10 August 1967	-8.6 °C31 December 1967	12.9 °C	1,802 mm	36	90
1966	33.4 °C17 August 1966	-7.1 °C15 February 1966	11.9 °C	2,026 mm	29	95
1965	35.4 °C6 August 1965	-9.7 °C6 January 1965	11.4 °C	2,185 mm	15	97
1964	34.4 °C16 August 1964	-6.8 °C6 January 1964	13.1 °C	2,441 mm	35	61
1963	37.1 °C10 August 1963	-7.0 °C15 January 1963	12.9 °C	1,938 mm	27	87
1962	36.1 °C3 August 1962	-5.2 °C17 January 1962	13.2 °C	1,732 mm	38	65
1961	35.0 °C4 September 1961	-6.2 °C12 February 1961	13.6 °C	2,351 mm	43	78
1960	34.5 °C29 August 1960	-5.7 °C31 December 1960	13.1 °C	2,035 mm	34	78
1959	34.4 °C8 August 1959	-7.4 °C9 January 1959	13.6 °C	2,050 mm	21	58
1958	33.2 °C18 August 1958	-8.1 °C28 January 1958	13.2 °C	1,925 mm	22	69
1957	35.7 °C21 August 1957	-5.8 °C3 February 1957	12.5 °C	1,921 mm	21	72
1956	35.3 °C9 September 1956	-6.4 °C27 February 1956	12.5 °C	2,077 mm	26	80
1955	35.7 °C19 July 1955	-6.8 °C7 February 1955	13.3 °C	2,029 mm	42	58
1954	35.6 °C18 August 1954	-9.8 °C13 January 1954	12.9 °C	1,735 mm	29	69
1953	32.8 °C10 August 1953	-6.1 °C28 January 1953	12.5 °C	2,403 mm	15	65
1952	32.4 °C19 August 1952	-8.3 °C14 January 1952	11.1 °C	2,283 mm	9	107
1951	35.8 °C19 August 1951	-8.9 °C16 January 1951	11.8 °C	1,647 mm	28	91
1950	35.1 °C31 July 1950	-8.0 °C5 January 1950	12.5 °C	1,667 mm	47	96
1949	34.9 °C15 August 1949	-8.3 °C12 February 1949	12.0 °C	1,845 mm	25	88
1948	33.0 °C9 September 1948	-8.3 °C1 February 1948	12.3 °C	1,702 mm	16	92
1947	32.5 °C19 July 1947	-8.8 °C21 December 1947	10.7 °C	1,903 mm	17	123
1946	34.5 °C29 July 1946	-8.1 °C11 February 1946	11.9 °C	1,711 mm	29	110
1945	33.3 °C25 August 1945	-10.0 °C22 February 1945	11.2 °C	2,442 mm	12	113
1944	32.0 °C22 August 1944	-9.5 °C3 February 1944	11.9 °C	1,774 mm	14	112
1943	32.8 °C22 July 1943	-10.3 °C30 December 1943	11.5 °C	1,468 mm	23	116
1942	35.1 °C1 September 1942	-11.1 °C17 January 1942	11.9 °C	1,373 mm	43	107
1941	34.3 °C24 August 1941	-10.1 °C12 February 1941	11.5 °C	1,617 mm	8	105
1940	32.1 °C14 July 1940	-8.3 °C17 January 1940	11.2 °C	1,721 mm	13	114

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

+1.3 °C

Hot days (≥ 30 °C)

66 d/yr

+34

Frost days (< 0 °C)

55 d/yr

-16

Annual rainfall

2111 mm

+175 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	5.1 °C	+0.9 °C	209 mm	+5 mm
Feb	3.7 °C	-0.9 °C	221 mm	+60 mm
Mar	10.2 °C	+1.6 °C	132 mm	-6 mm
Apr	16.3 °C	+0.3 °C	95 mm	-9 mm
May	21.2 °C	-0.2 °C	102 mm	-6 mm
Jun	26.7 °C	+1.8 °C	177 mm	+33 mm
Jul	33.0 °C	+4.6 °C	24 mm	-195 mm
Aug	31.7 °C	+1.5 °C	259 mm	+93 mm
Sep	28.2 °C	+2.6 °C	225 mm	+51 mm
Oct	20.1 °C	+0.5 °C	239 mm	+88 mm
Nov	14.0 °C	+0.4 °C	180 mm	+23 mm
Dec	8.9 °C	+1.4 °C	248 mm	+40 mm

The year's extremes

Hottest day

36.7 °C

1 Aug 2025

Coldest day

-5.5 °C

19 Jan 2025

Wettest day

66.4 mm

12 Aug 2025

Windiest day

39.1 km/h

29 Apr 2025

Strongest gust

87.5 km/h

16 Apr 2025

Hottest feels-like

42.4 °C

4 Aug 2025

Coldest feels-like

-9.9 °C

19 Jan 2025

Snowiest day

14.3 cm

26 Dec 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 Kashiwazaki?

Kashiwazaki has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.0 °C and it receives 1,936 mm of precipitation per year.

What is the hottest day ever recorded in Kashiwazaki?

The hottest day measured in Kashiwazaki between 1940 and 2025 was 14 August 2023, reaching 39.1 °C.

What is the coldest day in Kashiwazaki?

The coldest day measured in Kashiwazaki between 1940 and 2025 was 17 January 1942, at -11.1 °C.

Does it snow in Kashiwazaki?

Yes. Kashiwazaki gets on average 250.8 cm of snow per year and has around 71 frost days.

Has the climate of Kashiwazaki warmed?

Yes: Kashiwazaki warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Kashiwazaki?

The wettest day measured in Kashiwazaki between 1940 and 2025 was 8 July 1964, with 183 mm of rain in 24 hours.

What was the windiest day in Kashiwazaki?

The windiest day measured in Kashiwazaki between 1940 and 2025 was 16 September 1961, with winds reaching 63.6 km/h.

What is the warmest month in Kashiwazaki?

The warmest month in Kashiwazaki is August (26.0 °C on average); the coldest is January (1.2 °C).

How much does it rain in Kashiwazaki?

Kashiwazaki receives on average 1,936 mm of precipitation per year, spread over about 217 rainy days.

Is it sunny in Kashiwazaki?

Kashiwazaki 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 Kashiwazaki?

The heaviest 24-hour snowfall measured in Kashiwazaki between 1940 and 2025 was 15 February 2014, with 42.6 cm.

Are there tropical nights in Kashiwazaki?

Yes: Kashiwazaki has on average 60 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Kashiwazaki?

In Kashiwazaki, between 1940 and 2025, the highest apparent temperature reached 45.0 °C on 24 August 2023, and the lowest was -15.5 °C on 17 January 1942.

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