Annaka climate — normals and trends

Q: What is the climate of Annaka?

Annaka has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 1,990 mm of precipitation per year.

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

The hottest day measured in Annaka between 1940 and 2025 was 29 July 2024, reaching 36.5 °C.

Q: What is the coldest day in Annaka?

The coldest day measured in Annaka between 1940 and 2025 was 17 January 1942, at -14.8 °C.

Q: Does it snow in Annaka?

Yes. Annaka gets on average 56.0 cm of snow per year and has around 64 frost days.

Q: Has the climate of Annaka warmed?

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

Q: What is the wettest day in Annaka?

The wettest day measured in Annaka between 1940 and 2025 was 12 October 2019, with 258 mm of rain in 24 hours.

Q: What was the windiest day in Annaka?

The windiest day measured in Annaka between 1940 and 2025 was 2 August 1982, with winds reaching 44.4 km/h.

Q: What is the warmest month in Annaka?

The warmest month in Annaka is August (24.7 °C on average); the coldest is January (2.1 °C).

Q: How much does it rain in Annaka?

Annaka receives on average 1,990 mm of precipitation per year, spread over about 191 rainy days.

Q: Is it sunny in Annaka?

Annaka gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.

Annaka (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.2 °C and it receives 1,990 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 (24.7 °C on average) and the coldest is January (2.1 °C). Rainfall peaks in July.

Annaka averages 64 frost days, 21 hot days (≥ 30 °C) and 191 rainy days per year.

Annaka has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.

The number of frost days there went from about 94 to 34 per year over the period.

The hottest day of the period reached 36.5 °C (on 29 July 2024) and the coldest -14.8 °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

AnnakaGunma

coords: 36.33°, 138.90°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJulyDriest monthJanuary

Mean daily temperature

13.2°C

Average daily high

17.5°C

Average daily low

9.4°C

Annual rainfall

1,990mm

Sunshine / day

8.5h

Mean relative humidity

71%

Average peak wind

11.0km/h

Seasonal range

22.6°C

Frost days (< 0 °C)

64 d/yr

Hot days (≥ 30 °C)

21 d/yr

Rainy days (≥ 1 mm)

191 d/yr

Annual snowfall

56.0 cm

Average feels-like high

17.2 °C

Average feels-like low

8.3 °C

Average peak gust

30.7 km/h

Tropical nights (≥ 20 °C)

56 d/yr

Solar radiation

14.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.7 °C

since 1940

+0.3 °C per decade · r² = 0.71 · 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

29 July 2024

Coldest day

-14.8 °C

17 January 1942

Wettest day

258 mm

12 October 2019

Windiest day

44.4 km/h

2 August 1982

Strongest gust

155.9 km/h

2 August 1982

Hottest feels-like

43.2 °C

16 July 2023

Coldest feels-like

-20.2 °C

17 January 1942

Snowiest day

60.6 cm

15 February 2014

Sunniest day

14.0 h

16 June 2004

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	36.2 °C5 August 2025	-5.0 °C12 February 2025	14.5 °C	1,541 mm	60	60
2024	36.5 °C29 July 2024	-4.6 °C29 December 2024	15.5 °C	2,104 mm	58	29
2023	36.3 °C16 July 2023	-4.7 °C25 January 2023	15.6 °C	1,695 mm	52	27
2022	35.8 °C25 June 2022	-4.4 °C19 February 2022	14.6 °C	1,869 mm	35	43
2021	33.3 °C10 August 2021	-4.7 °C10 January 2021	14.6 °C	2,044 mm	29	37
2020	36.0 °C11 August 2020	-3.5 °C7 February 2020	14.8 °C	2,238 mm	32	15
2019	33.8 °C1 August 2019	-4.8 °C10 February 2019	14.7 °C	1,925 mm	31	33
2018	36.1 °C23 July 2018	-8.6 °C6 February 2018	15.0 °C	1,638 mm	48	42
2017	33.3 °C9 August 2017	-5.2 °C16 January 2017	14.0 °C	1,946 mm	25	39
2016	34.4 °C17 August 2016	-9.2 °C25 January 2016	14.4 °C	1,988 mm	21	41
2015	34.7 °C7 August 2015	-3.7 °C10 February 2015	14.5 °C	1,840 mm	31	33
2014	35.4 °C5 August 2014	-6.7 °C5 February 2014	13.8 °C	1,794 mm	22	69
2013	35.7 °C10 August 2013	-7.4 °C16 January 2013	14.1 °C	1,657 mm	28	55
2012	33.8 °C17 July 2012	-7.4 °C18 February 2012	13.5 °C	1,873 mm	29	66
2011	34.6 °C24 June 2011	-8.4 °C27 January 2011	13.8 °C	2,042 mm	34	64
2010	34.6 °C23 July 2010	-5.6 °C5 February 2010	14.2 °C	2,318 mm	44	46
2009	33.9 °C13 July 2009	-2.6 °C13 January 2009	14.1 °C	2,086 mm	10	21
2008	32.7 °C8 August 2008	-5.1 °C4 February 2008	13.9 °C	2,037 mm	17	42
2007	35.1 °C16 August 2007	-2.4 °C5 February 2007	14.3 °C	2,129 mm	30	16
2006	34.7 °C4 August 2006	-4.0 °C5 February 2006	14.1 °C	2,020 mm	18	34
2005	34.1 °C28 June 2005	-9.5 °C7 March 2005	13.9 °C	1,813 mm	28	47
2004	34.8 °C20 July 2004	-5.1 °C24 January 2004	14.6 °C	2,050 mm	35	40
2003	33.7 °C23 August 2003	-6.7 °C7 February 2003	13.2 °C	2,042 mm	14	57
2002	33.5 °C1 August 2002	-5.7 °C12 February 2002	13.8 °C	2,030 mm	26	48
2001	34.1 °C24 July 2001	-10.1 °C15 January 2001	13.4 °C	1,893 mm	22	63
2000	35.0 °C2 September 2000	-7.0 °C27 February 2000	14.0 °C	1,836 mm	22	45
1999	33.4 °C24 July 1999	-7.6 °C21 February 1999	14.1 °C	2,017 mm	22	51
1998	33.7 °C3 July 1998	-8.0 °C19 February 1998	14.2 °C	2,575 mm	12	47
1997	36.0 °C10 August 1997	-6.3 °C7 January 1997	13.8 °C	1,700 mm	23	52
1996	35.4 °C15 August 1996	-10.5 °C20 February 1996	13.0 °C	1,741 mm	20	56
1995	34.5 °C19 August 1995	-8.1 °C7 March 1995	13.4 °C	1,794 mm	34	57
1994	35.4 °C5 July 1994	-9.7 °C16 January 1994	14.0 °C	1,783 mm	39	68
1993	32.6 °C13 May 1993	-3.8 °C15 February 1993	13.0 °C	2,366 mm	5	48
1992	34.8 °C31 July 1992	-8.1 °C22 February 1992	13.4 °C	1,792 mm	21	50
1991	35.4 °C24 July 1991	-4.4 °C31 December 1991	13.9 °C	2,315 mm	22	49
1990	34.8 °C24 August 1990	-9.6 °C21 January 1990	14.3 °C	1,953 mm	26	36
1989	31.4 °C28 August 1989	-6.8 °C28 January 1989	13.5 °C	2,142 mm	5	34
1988	31.8 °C9 July 1988	-9.3 °C16 February 1988	12.6 °C	2,308 mm	7	56
1987	36.1 °C24 July 1987	-9.5 °C12 January 1987	13.6 °C	1,567 mm	30	67
1986	32.9 °C4 September 1986	-10.6 °C11 February 1986	12.4 °C	2,035 mm	9	77
1985	33.6 °C29 July 1985	-10.1 °C22 February 1985	13.0 °C	1,987 mm	23	67
1984	34.4 °C2 September 1984	-10.8 °C7 February 1984	12.0 °C	1,500 mm	28	102
1983	33.5 °C30 August 1983	-9.4 °C23 January 1983	12.8 °C	2,012 mm	22	76
1982	31.7 °C2 August 1982	-9.6 °C31 January 1982	13.0 °C	2,106 mm	6	55
1981	32.3 °C10 July 1981	-13.0 °C27 February 1981	12.4 °C	1,930 mm	15	81
1980	31.1 °C23 July 1980	-8.2 °C28 December 1980	12.5 °C	2,210 mm	4	80
1979	33.0 °C27 August 1979	-9.2 °C3 February 1979	13.9 °C	2,155 mm	18	63
1978	33.6 °C21 August 1978	-9.7 °C16 February 1978	13.1 °C	1,854 mm	34	83
1977	32.0 °C4 August 1977	-13.6 °C16 February 1977	12.9 °C	2,292 mm	12	72
1976	32.8 °C1 August 1976	-10.1 °C28 December 1976	12.5 °C	2,269 mm	11	61
1975	32.6 °C5 August 1975	-12.0 °C5 January 1975	12.9 °C	2,154 mm	18	84
1974	31.8 °C6 August 1974	-11.6 °C12 February 1974	12.5 °C	2,348 mm	8	81
1973	33.7 °C10 August 1973	-8.9 °C19 March 1973	13.1 °C	1,923 mm	31	79
1972	33.9 °C8 August 1972	-9.4 °C9 February 1972	13.3 °C	2,574 mm	18	59
1971	32.9 °C8 July 1971	-9.6 °C11 January 1971	12.7 °C	2,368 mm	21	67
1970	33.3 °C23 July 1970	-10.7 °C17 January 1970	12.3 °C	2,026 mm	22	83
1969	34.1 °C13 August 1969	-9.3 °C27 February 1969	12.8 °C	2,019 mm	16	81
1968	32.2 °C20 July 1968	-11.3 °C21 February 1968	12.8 °C	2,175 mm	10	73
1967	32.8 °C11 August 1967	-11.8 °C1 March 1967	12.8 °C	1,962 mm	24	88
1966	31.7 °C8 August 1966	-6.7 °C10 January 1966	12.2 °C	2,135 mm	6	87
1965	34.0 °C30 July 1965	-9.4 °C4 February 1965	11.9 °C	2,034 mm	8	90
1964	33.5 °C24 July 1964	-8.2 °C1 March 1964	13.1 °C	2,266 mm	28	57
1963	33.4 °C13 August 1963	-11.3 °C15 March 1963	12.9 °C	1,811 mm	16	80
1962	35.6 °C9 August 1962	-7.3 °C28 February 1962	13.2 °C	1,990 mm	27	75
1961	34.5 °C26 July 1961	-5.3 °C21 January 1961	13.8 °C	2,003 mm	29	80
1960	33.8 °C1 August 1960	-8.6 °C25 January 1960	13.3 °C	1,971 mm	22	60
1959	34.0 °C2 September 1959	-9.5 °C9 January 1959	13.5 °C	2,613 mm	21	60
1958	34.0 °C1 August 1958	-9.4 °C30 March 1958	13.1 °C	2,270 mm	16	66
1957	32.1 °C28 July 1957	-9.3 °C12 February 1957	12.7 °C	2,211 mm	12	75
1956	34.0 °C2 August 1956	-10.3 °C23 February 1956	12.6 °C	2,127 mm	19	86
1955	33.4 °C31 July 1955	-6.8 °C12 February 1955	13.6 °C	1,747 mm	20	54
1954	34.1 °C23 August 1954	-8.6 °C31 January 1954	12.8 °C	2,000 mm	13	66
1953	35.2 °C21 August 1953	-8.1 °C10 January 1953	12.9 °C	2,180 mm	14	63
1952	31.4 °C26 August 1952	-12.3 °C6 February 1952	11.5 °C	1,834 mm	9	102
1951	32.6 °C10 August 1951	-14.5 °C16 January 1951	12.0 °C	1,784 mm	11	83
1950	31.3 °C22 August 1950	-12.1 °C19 February 1950	12.2 °C	1,863 mm	7	100
1949	31.5 °C6 August 1949	-5.0 °C30 December 1949	12.1 °C	2,029 mm	6	83
1948	29.6 °C26 July 1948	-5.5 °C4 February 1948	12.6 °C	1,824 mm	0	82
1947	32.5 °C14 August 1947	-12.1 °C23 February 1947	11.3 °C	1,772 mm	18	100
1946	33.1 °C17 July 1946	-11.8 °C5 February 1946	12.2 °C	1,658 mm	15	103
1945	31.7 °C4 August 1945	-12.2 °C24 February 1945	11.5 °C	2,080 mm	5	103
1944	31.4 °C2 September 1944	-8.7 °C19 February 1944	12.3 °C	1,966 mm	8	97
1943	30.6 °C9 August 1943	-8.9 °C2 February 1943	11.8 °C	1,346 mm	4	96
1942	32.5 °C11 July 1942	-14.8 °C17 January 1942	11.9 °C	1,543 mm	12	92
1941	29.8 °C30 June 1941	-8.5 °C12 January 1941	11.8 °C	2,166 mm	0	90
1940	32.4 °C18 July 1940	-11.0 °C10 February 1940	11.6 °C	1,523 mm	7	99

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

19.3 °C

+1.8 °C

Hot days (≥ 30 °C)

60 d/yr

+39

Frost days (< 0 °C)

60 d/yr

-4

Annual rainfall

1541 mm

-449 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	9.0 °C	+1.9 °C	50 mm	-5 mm
Feb	8.1 °C	+0.4 °C	19 mm	-54 mm
Mar	13.3 °C	+2.0 °C	161 mm	+41 mm
Apr	18.3 °C	+1.4 °C	170 mm	+30 mm
May	21.1 °C	+0.1 °C	236 mm	+55 mm
Jun	26.8 °C	+3.4 °C	191 mm	-68 mm
Jul	30.6 °C	+3.5 °C	139 mm	-148 mm
Aug	31.4 °C	+3.1 °C	114 mm	-140 mm
Sep	27.3 °C	+3.0 °C	245 mm	-28 mm
Oct	19.4 °C	+0.4 °C	149 mm	-51 mm
Nov	15.2 °C	+0.8 °C	23 mm	-67 mm
Dec	11.0 °C	+1.2 °C	44 mm	-12 mm

The year's extremes

Hottest day

36.2 °C

5 Aug 2025

Coldest day

-5.0 °C

12 Feb 2025

Wettest day

60.3 mm

5 Sep 2025

Windiest day

28.2 km/h

13 Feb 2025

Strongest gust

78.5 km/h

13 Feb 2025

Hottest feels-like

43.0 °C

5 Aug 2025

Coldest feels-like

-9.3 °C

11 Jan 2025

Snowiest day

13.2 cm

19 Mar 2025

Sunniest day

14.0 h

19 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 Annaka?

Annaka has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 1,990 mm of precipitation per year.

What is the hottest day ever recorded in Annaka?

The hottest day measured in Annaka between 1940 and 2025 was 29 July 2024, reaching 36.5 °C.

What is the coldest day in Annaka?

The coldest day measured in Annaka between 1940 and 2025 was 17 January 1942, at -14.8 °C.

Does it snow in Annaka?

Yes. Annaka gets on average 56.0 cm of snow per year and has around 64 frost days.

Has the climate of Annaka warmed?

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

What is the wettest day in Annaka?

The wettest day measured in Annaka between 1940 and 2025 was 12 October 2019, with 258 mm of rain in 24 hours.

What was the windiest day in Annaka?

The windiest day measured in Annaka between 1940 and 2025 was 2 August 1982, with winds reaching 44.4 km/h.

What is the warmest month in Annaka?

The warmest month in Annaka is August (24.7 °C on average); the coldest is January (2.1 °C).

How much does it rain in Annaka?

Annaka receives on average 1,990 mm of precipitation per year, spread over about 191 rainy days.

Is it sunny in Annaka?

Annaka gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.

What is the biggest single-day snowfall in Annaka?

The heaviest 24-hour snowfall measured in Annaka between 1940 and 2025 was 15 February 2014, with 60.6 cm.

Are there tropical nights in Annaka?

Yes: Annaka has on average 56 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Annaka?

In Annaka, between 1940 and 2025, the highest apparent temperature reached 43.2 °C on 16 July 2023, and the lowest was -20.2 °C on 17 January 1942.

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