Aizu-Wakamatsu climate — normals and trends

Q: What is the climate of Aizu-Wakamatsu?

Aizu-Wakamatsu has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.1 °C and it receives 1,330 mm of precipitation per year.

Q: What is the hottest day ever recorded in Aizu-Wakamatsu?

The hottest day measured in Aizu-Wakamatsu between 1940 and 2025 was 19 August 2023, reaching 34.6 °C.

Q: What is the coldest day in Aizu-Wakamatsu?

The coldest day measured in Aizu-Wakamatsu between 1940 and 2025 was 11 February 1942, at -17.7 °C.

Q: Does it snow in Aizu-Wakamatsu?

Yes. Aizu-Wakamatsu gets on average 191.6 cm of snow per year and has around 114 frost days.

Q: Has the climate of Aizu-Wakamatsu warmed?

Yes: Aizu-Wakamatsu warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Aizu-Wakamatsu?

The wettest day measured in Aizu-Wakamatsu between 1940 and 2025 was 12 October 2019, with 126 mm of rain in 24 hours.

Q: What was the windiest day in Aizu-Wakamatsu?

The windiest day measured in Aizu-Wakamatsu between 1940 and 2025 was 2 August 1982, with winds reaching 42.1 km/h.

Q: What is the warmest month in Aizu-Wakamatsu?

The warmest month in Aizu-Wakamatsu is August (23.1 °C on average); the coldest is January (-1.8 °C).

Q: How much does it rain in Aizu-Wakamatsu?

Aizu-Wakamatsu receives on average 1,330 mm of precipitation per year, spread over about 181 rainy days.

Q: Is it sunny in Aizu-Wakamatsu?

Aizu-Wakamatsu gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.

Aizu-Wakamatsu (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.1 °C and it receives 1,330 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 (23.1 °C on average) and the coldest is January (-1.8 °C). Rainfall peaks in July.

Aizu-Wakamatsu averages 114 frost days, 11 hot days (≥ 30 °C) and 181 rainy days per year.

Aizu-Wakamatsu has warmed by +2.6 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.

The number of frost days there went from about 132 to 96 per year over the period.

The hottest day of the period reached 34.6 °C (on 19 August 2023) and the coldest -17.7 °C (on 11 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

Aizu-WakamatsuFukushima

coords: 37.49°, 139.95°
period: 1940–2025 · 86 yrs

DfaHot-summer humid continentalWarmest monthAugustColdest monthJanuaryWettest monthJulyDriest monthFebruary

Mean daily temperature

10.1°C

Average daily high

14.1°C

Average daily low

6.5°C

Annual rainfall

1,330mm

Sunshine / day

7.5h

Mean relative humidity

81%

Average peak wind

13.9km/h

Seasonal range

24.9°C

Frost days (< 0 °C)

114 d/yr

Hot days (≥ 30 °C)

11 d/yr

Rainy days (≥ 1 mm)

181 d/yr

Annual snowfall

191.6 cm

Average feels-like high

12.9 °C

Average feels-like low

4.9 °C

Average peak gust

42.5 km/h

Tropical nights (≥ 20 °C)

30 d/yr

Solar radiation

13.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.6 °C

since 1940

+0.3 °C per decade · r² = 0.65 · 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

34.6 °C

19 August 2023

Coldest day

-17.7 °C

11 February 1942

Wettest day

126 mm

12 October 2019

Windiest day

42.1 km/h

2 August 1982

Strongest gust

158.8 km/h

27 September 1959

Hottest feels-like

40.7 °C

6 August 2019

Coldest feels-like

-22.6 °C

11 February 1942

Snowiest day

53.8 cm

24 December 1980

Sunniest day

14.2 h

15 June 2004

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	34.5 °C26 July 2025	-7.8 °C6 January 2025	11.6 °C	1,248 mm	39	109
2024	33.1 °C23 July 2024	-7.3 °C14 January 2024	12.4 °C	1,501 mm	27	98
2023	34.6 °C19 August 2023	-9.9 °C30 January 2023	12.4 °C	1,304 mm	47	86
2022	34.3 °C1 August 2022	-8.6 °C7 January 2022	11.4 °C	1,331 mm	22	99
2021	33.1 °C20 July 2021	-11.4 °C9 January 2021	11.5 °C	1,465 mm	18	89
2020	33.3 °C11 August 2020	-10.7 °C7 February 2020	11.7 °C	1,511 mm	17	81
2019	34.0 °C7 August 2019	-9.4 °C15 February 2019	11.4 °C	1,368 mm	22	105
2018	34.3 °C1 August 2018	-11.2 °C12 January 2018	11.5 °C	1,111 mm	35	96
2017	32.5 °C10 July 2017	-8.3 °C15 January 2017	10.7 °C	1,395 mm	11	110
2016	33.5 °C6 August 2016	-8.8 °C20 January 2016	11.6 °C	1,277 mm	11	98
2015	34.4 °C5 August 2015	-8.2 °C19 January 2015	11.4 °C	1,357 mm	19	93
2014	33.0 °C6 August 2014	-10.4 °C4 March 2014	10.5 °C	1,350 mm	12	108
2013	32.0 °C15 August 2013	-11.3 °C24 February 2013	10.7 °C	1,428 mm	11	109
2012	32.6 °C22 August 2012	-12.5 °C19 February 2012	10.3 °C	1,245 mm	29	123
2011	32.5 °C9 July 2011	-9.6 °C6 March 2011	10.5 °C	1,248 mm	19	124
2010	32.8 °C5 August 2010	-11.8 °C3 February 2010	11.1 °C	1,557 mm	35	109
2009	32.0 °C15 July 2009	-11.8 °C18 February 2009	11.0 °C	1,353 mm	4	97
2008	31.6 °C3 August 2008	-8.7 °C2 February 2008	10.9 °C	1,240 mm	11	97
2007	33.2 °C15 August 2007	-7.4 °C20 January 2007	11.3 °C	1,336 mm	16	95
2006	31.5 °C7 August 2006	-10.0 °C10 January 2006	10.9 °C	1,442 mm	7	95
2005	33.9 °C6 August 2005	-11.9 °C2 February 2005	10.5 °C	1,235 mm	12	111
2004	32.8 °C19 August 2004	-8.8 °C8 February 2004	11.4 °C	1,472 mm	14	92
2003	30.7 °C3 August 2003	-10.7 °C16 January 2003	10.5 °C	1,256 mm	4	103
2002	32.6 °C20 July 2002	-8.6 °C4 March 2002	10.8 °C	1,449 mm	19	91
2001	32.3 °C12 July 2001	-8.6 °C12 March 2001	10.6 °C	1,248 mm	10	110
2000	32.7 °C23 July 2000	-10.0 °C26 January 2000	10.9 °C	1,399 mm	15	114
1999	32.4 °C30 July 1999	-8.8 °C13 March 1999	11.1 °C	1,283 mm	21	108
1998	31.6 °C3 July 1998	-6.9 °C12 February 1998	11.3 °C	1,573 mm	3	102
1997	32.3 °C9 August 1997	-8.4 °C22 January 1997	10.7 °C	1,218 mm	6	104
1996	32.4 °C26 July 1996	-10.5 °C20 February 1996	9.8 °C	1,323 mm	8	123
1995	32.2 °C24 July 1995	-8.6 °C14 January 1995	10.2 °C	1,286 mm	13	112
1994	34.2 °C14 August 1994	-7.5 °C9 January 1994	11.2 °C	1,023 mm	35	109
1993	29.0 °C25 August 1993	-6.2 °C4 January 1993	9.8 °C	1,521 mm	0	104
1992	31.8 °C25 August 1992	-7.0 °C20 February 1992	10.4 °C	1,145 mm	8	102
1991	31.2 °C23 July 1991	-7.3 °C14 February 1991	10.8 °C	1,417 mm	6	102
1990	32.9 °C23 August 1990	-11.2 °C10 February 1990	11.7 °C	1,171 mm	16	87
1989	30.0 °C22 July 1989	-8.9 °C10 March 1989	10.9 °C	1,258 mm	1	91
1988	30.4 °C23 August 1988	-13.4 °C22 February 1988	9.5 °C	1,427 mm	2	119
1987	32.6 °C23 July 1987	-9.1 °C2 February 1987	10.6 °C	1,034 mm	9	117
1986	32.1 °C29 July 1986	-13.7 °C8 February 1986	9.5 °C	1,201 mm	5	122
1985	32.5 °C18 August 1985	-12.1 °C16 December 1985	10.1 °C	1,474 mm	26	116
1984	33.2 °C17 August 1984	-11.1 °C12 February 1984	9.4 °C	974 mm	21	131
1983	31.6 °C5 August 1983	-8.2 °C2 January 1983	9.9 °C	1,556 mm	5	121
1982	28.7 °C14 August 1982	-9.0 °C31 January 1982	10.3 °C	1,282 mm	0	107
1981	30.8 °C1 August 1981	-9.9 °C27 February 1981	9.0 °C	1,326 mm	7	126
1980	29.5 °C22 July 1980	-8.3 °C27 January 1980	9.3 °C	1,532 mm	0	123
1979	31.3 °C1 August 1979	-8.4 °C22 January 1979	10.7 °C	1,547 mm	4	106
1978	32.0 °C7 July 1978	-9.5 °C17 February 1978	10.1 °C	1,357 mm	16	116
1977	31.6 °C4 August 1977	-11.0 °C16 February 1977	9.9 °C	1,378 mm	6	101
1976	30.5 °C25 July 1976	-11.2 °C14 February 1976	9.2 °C	1,881 mm	2	127
1975	32.0 °C29 July 1975	-12.2 °C18 February 1975	10.2 °C	1,296 mm	12	118
1974	30.2 °C30 July 1974	-10.1 °C22 February 1974	9.4 °C	1,523 mm	1	131
1973	32.1 °C18 August 1973	-8.3 °C25 February 1973	10.0 °C	1,146 mm	18	123
1972	31.6 °C6 August 1972	-9.9 °C7 January 1972	10.5 °C	1,643 mm	8	104
1971	31.5 °C2 August 1971	-9.0 °C5 February 1971	9.5 °C	1,676 mm	7	119
1970	33.2 °C25 July 1970	-11.8 °C13 March 1970	9.4 °C	1,247 mm	9	130
1969	31.5 °C18 July 1969	-9.9 °C29 December 1969	9.7 °C	1,455 mm	4	127
1968	31.9 °C20 July 1968	-11.9 °C24 February 1968	10.1 °C	1,273 mm	5	101
1967	31.1 °C10 August 1967	-13.2 °C17 February 1967	10.0 °C	1,351 mm	7	122
1966	30.1 °C10 August 1966	-10.7 °C13 February 1966	9.3 °C	1,446 mm	2	135
1965	29.1 °C5 August 1965	-11.2 °C13 January 1965	8.8 °C	1,210 mm	0	137
1964	32.1 °C26 July 1964	-7.5 °C9 January 1964	10.1 °C	1,539 mm	20	123
1963	31.6 °C28 July 1963	-12.3 °C16 January 1963	10.0 °C	1,270 mm	5	113
1962	33.2 °C3 August 1962	-9.0 °C27 January 1962	10.3 °C	1,170 mm	19	117
1961	32.6 °C26 July 1961	-10.9 °C18 January 1961	10.6 °C	1,553 mm	18	124
1960	32.5 °C8 August 1960	-9.8 °C30 December 1960	10.3 °C	1,468 mm	12	119
1959	30.7 °C2 August 1959	-8.8 °C21 January 1959	10.7 °C	1,469 mm	2	104
1958	30.8 °C17 July 1958	-9.6 °C5 January 1958	10.2 °C	1,598 mm	5	122
1957	30.7 °C3 August 1957	-9.5 °C3 February 1957	9.7 °C	1,309 mm	5	122
1956	31.8 °C31 July 1956	-11.5 °C27 February 1956	9.6 °C	1,508 mm	6	128
1955	32.8 °C30 July 1955	-8.6 °C12 February 1955	10.3 °C	1,450 mm	12	108
1954	31.3 °C15 August 1954	-9.8 °C14 March 1954	9.9 °C	1,200 mm	7	114
1953	32.1 °C27 July 1953	-10.6 °C17 February 1953	9.4 °C	1,494 mm	4	122
1952	30.5 °C3 August 1952	-10.8 °C6 March 1952	8.4 °C	1,261 mm	1	132
1951	30.6 °C14 August 1951	-10.0 °C21 February 1951	9.0 °C	1,147 mm	2	127
1950	31.5 °C22 July 1950	-11.7 °C5 January 1950	9.5 °C	1,086 mm	4	126
1949	30.8 °C18 July 1949	-10.9 °C24 February 1949	9.1 °C	1,188 mm	2	132
1948	29.4 °C27 July 1948	-11.2 °C28 January 1948	9.5 °C	1,098 mm	0	118
1947	29.9 °C14 August 1947	-13.5 °C23 February 1947	7.9 °C	1,233 mm	0	153
1946	32.0 °C18 July 1946	-10.1 °C11 February 1946	9.2 °C	1,052 mm	6	136
1945	30.5 °C7 August 1945	-13.9 °C22 February 1945	8.4 °C	1,598 mm	3	132
1944	30.7 °C1 July 1944	-13.6 °C18 February 1944	9.3 °C	1,119 mm	1	136
1943	29.3 °C8 August 1943	-14.4 °C17 February 1943	8.9 °C	791 mm	0	141
1942	30.4 °C3 August 1942	-17.7 °C11 February 1942	9.1 °C	863 mm	5	131
1941	29.0 °C24 August 1941	-11.9 °C15 February 1941	8.9 °C	1,158 mm	0	131
1940	29.5 °C20 July 1940	-12.3 °C27 January 1940	8.6 °C	1,148 mm	0	136

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

16.0 °C

+1.9 °C

Hot days (≥ 30 °C)

39 d/yr

+28

Frost days (< 0 °C)

109 d/yr

-5

Annual rainfall

1248 mm

-82 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	2.4 °C	+1.2 °C	86 mm	-5 mm
Feb	1.3 °C	-0.5 °C	90 mm	+10 mm
Mar	7.3 °C	+1.7 °C	85 mm	-11 mm
Apr	14.6 °C	+1.7 °C	93 mm	+2 mm
May	19.0 °C	+0.3 °C	141 mm	+46 mm
Jun	25.7 °C	+3.6 °C	103 mm	-24 mm
Jul	30.3 °C	+4.6 °C	55 mm	-119 mm
Aug	29.5 °C	+2.4 °C	154 mm	+15 mm
Sep	25.6 °C	+3.1 °C	106 mm	-43 mm
Oct	17.2 °C	+0.8 °C	140 mm	+27 mm
Nov	11.4 °C	+0.9 °C	76 mm	-6 mm
Dec	6.1 °C	+1.8 °C	119 mm	+26 mm

The year's extremes

Hottest day

34.5 °C

26 Jul 2025

Coldest day

-7.8 °C

6 Jan 2025

Wettest day

43.5 mm

11 Aug 2025

Windiest day

31.6 km/h

11 Feb 2025

Strongest gust

109.4 km/h

16 Apr 2025

Hottest feels-like

40.3 °C

29 Jul 2025

Coldest feels-like

-11.8 °C

19 Feb 2025

Snowiest day

8.5 cm

30 Jan 2025

Sunniest day

14.0 h

18 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 Aizu-Wakamatsu?

Aizu-Wakamatsu has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.1 °C and it receives 1,330 mm of precipitation per year.

What is the hottest day ever recorded in Aizu-Wakamatsu?

The hottest day measured in Aizu-Wakamatsu between 1940 and 2025 was 19 August 2023, reaching 34.6 °C.

What is the coldest day in Aizu-Wakamatsu?

The coldest day measured in Aizu-Wakamatsu between 1940 and 2025 was 11 February 1942, at -17.7 °C.

Does it snow in Aizu-Wakamatsu?

Yes. Aizu-Wakamatsu gets on average 191.6 cm of snow per year and has around 114 frost days.

Has the climate of Aizu-Wakamatsu warmed?

Yes: Aizu-Wakamatsu warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Aizu-Wakamatsu?

The wettest day measured in Aizu-Wakamatsu between 1940 and 2025 was 12 October 2019, with 126 mm of rain in 24 hours.

What was the windiest day in Aizu-Wakamatsu?

The windiest day measured in Aizu-Wakamatsu between 1940 and 2025 was 2 August 1982, with winds reaching 42.1 km/h.

What is the warmest month in Aizu-Wakamatsu?

The warmest month in Aizu-Wakamatsu is August (23.1 °C on average); the coldest is January (-1.8 °C).

How much does it rain in Aizu-Wakamatsu?

Aizu-Wakamatsu receives on average 1,330 mm of precipitation per year, spread over about 181 rainy days.

Is it sunny in Aizu-Wakamatsu?

Aizu-Wakamatsu gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.

What is the biggest single-day snowfall in Aizu-Wakamatsu?

The heaviest 24-hour snowfall measured in Aizu-Wakamatsu between 1940 and 2025 was 24 December 1980, with 53.8 cm.

Are there tropical nights in Aizu-Wakamatsu?

Yes: Aizu-Wakamatsu has on average 30 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Aizu-Wakamatsu?

In Aizu-Wakamatsu, between 1940 and 2025, the highest apparent temperature reached 40.7 °C on 6 August 2019, and the lowest was -22.6 °C on 11 February 1942.

Compare Aizu-Wakamatsu with another city

Pick a second city: its normals will be set against these, indicator by indicator.

Nearby cities

The climate around Aizu-Wakamatsu

Other cities — Japan

All cities in Japan →