Sukumo climate — normals and trends

Q: What is the climate of Sukumo?

Sukumo has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.7 °C and it receives 1,905 mm of precipitation per year.

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

The hottest day measured in Sukumo between 1940 and 2025 was 11 August 2013, reaching 36.6 °C.

Q: What is the coldest day in Sukumo?

The coldest day measured in Sukumo between 1940 and 2025 was 26 February 1981, at -4.8 °C.

Q: Does it snow in Sukumo?

Yes. Sukumo gets on average 2.4 cm of snow per year and has around 4 frost days.

Q: Has the climate of Sukumo warmed?

Yes: Sukumo warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Sukumo?

The wettest day measured in Sukumo between 1940 and 2025 was 29 July 1946, with 218 mm of rain in 24 hours.

Q: What was the windiest day in Sukumo?

The windiest day measured in Sukumo between 1940 and 2025 was 30 August 2004, with winds reaching 75.7 km/h.

Q: What is the warmest month in Sukumo?

The warmest month in Sukumo is August (26.6 °C on average); the coldest is January (6.7 °C).

Q: How much does it rain in Sukumo?

Sukumo receives on average 1,905 mm of precipitation per year, spread over about 142 rainy days.

Q: Is it sunny in Sukumo?

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

Sukumo (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.7 °C and it receives 1,905 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 (26.6 °C on average) and the coldest is January (6.7 °C). Rainfall peaks in June.

Sukumo averages 4 frost days, 24 hot days (≥ 30 °C) and 142 rainy days per year.

Sukumo has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.

The number of frost days there went from about 8 to 0 per year over the period.

The hottest day of the period reached 36.6 °C (on 11 August 2013) and the coldest -4.8 °C (on 26 February 1981).

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

SukumoKochi

coords: 32.93°, 132.73°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJuneDriest monthJanuary

Mean daily temperature

16.7°C

Average daily high

19.9°C

Average daily low

13.7°C

Annual rainfall

1,905mm

Sunshine / day

8.6h

Mean relative humidity

73%

Average peak wind

18.6km/h

Seasonal range

19.9°C

Frost days (< 0 °C)

4 d/yr

Hot days (≥ 30 °C)

24 d/yr

Rainy days (≥ 1 mm)

142 d/yr

Annual snowfall

2.4 cm

Average feels-like high

20.0 °C

Average feels-like low

12.5 °C

Average peak gust

42.9 km/h

Tropical nights (≥ 20 °C)

100 d/yr

Solar radiation

15.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.5 °C

since 1940

+0.3 °C per decade · r² = 0.75 · 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

36.6 °C

11 August 2013

Coldest day

-4.8 °C

26 February 1981

Wettest day

218 mm

29 July 1946

Windiest day

75.7 km/h

30 August 2004

Strongest gust

194.8 km/h

30 August 2004

Hottest feels-like

41.8 °C

6 August 1994

Coldest feels-like

-13.1 °C

26 February 1981

Snowiest day

9.9 cm

19 January 1984

Sunniest day

13.9 h

20 June 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	33.4 °C3 August 2025	-1.2 °C25 February 2025	17.6 °C	1,762 mm	62	5
2024	35.2 °C16 August 2024	0.4 °C24 January 2024	18.7 °C	2,207 mm	68	0
2023	34.3 °C4 September 2023	-2.0 °C25 January 2023	18.1 °C	1,883 mm	43	3
2022	33.4 °C4 August 2022	0.5 °C25 February 2022	17.8 °C	1,693 mm	51	0
2021	32.7 °C31 July 2021	-2.0 °C9 January 2021	18.0 °C	2,191 mm	30	5
2020	35.3 °C16 August 2020	1.1 °C31 December 2020	17.9 °C	2,305 mm	39	0
2019	32.2 °C1 August 2019	2.1 °C4 January 2019	18.0 °C	2,072 mm	32	0
2018	34.0 °C24 July 2018	-1.4 °C7 February 2018	17.6 °C	2,328 mm	38	8
2017	33.5 °C10 August 2017	0.8 °C15 January 2017	17.3 °C	2,113 mm	46	0
2016	33.2 °C22 August 2016	-2.5 °C24 January 2016	18.3 °C	2,319 mm	41	2
2015	33.7 °C30 July 2015	0.2 °C9 February 2015	17.7 °C	2,467 mm	23	0
2014	32.8 °C26 July 2014	0.0 °C19 December 2014	17.2 °C	2,344 mm	18	0
2013	36.6 °C11 August 2013	0.4 °C4 January 2013	17.6 °C	1,664 mm	53	0
2012	32.6 °C28 July 2012	-1.5 °C3 February 2012	17.0 °C	2,391 mm	21	3
2011	32.8 °C12 August 2011	-2.4 °C16 January 2011	17.3 °C	2,098 mm	23	3
2010	32.5 °C1 August 2010	0.5 °C14 January 2010	17.7 °C	2,135 mm	43	0
2009	32.5 °C19 July 2009	0.2 °C24 January 2009	17.6 °C	1,736 mm	16	0
2008	34.5 °C30 July 2008	0.3 °C25 February 2008	17.4 °C	1,806 mm	38	0
2007	32.9 °C28 August 2007	0.9 °C3 February 2007	17.9 °C	1,666 mm	36	0
2006	34.2 °C8 August 2006	-0.1 °C4 February 2006	17.5 °C	2,074 mm	33	1
2005	33.8 °C12 August 2005	-1.4 °C18 December 2005	17.0 °C	1,405 mm	31	5
2004	36.1 °C30 July 2004	-1.4 °C22 January 2004	17.8 °C	2,266 mm	30	2
2003	33.7 °C3 September 2003	-0.3 °C16 January 2003	17.4 °C	2,308 mm	28	2
2002	34.0 °C18 August 2002	0.7 °C2 January 2002	17.6 °C	1,541 mm	26	0
2001	33.9 °C24 July 2001	-1.3 °C15 January 2001	17.4 °C	2,021 mm	44	3
2000	34.5 °C22 July 2000	0.2 °C28 January 2000	17.4 °C	1,912 mm	33	0
1999	31.7 °C14 August 1999	-1.3 °C4 February 1999	17.4 °C	2,329 mm	18	1
1998	34.5 °C12 August 1998	-1.5 °C25 January 1998	18.4 °C	2,329 mm	54	2
1997	32.9 °C2 September 1997	-1.2 °C22 January 1997	17.2 °C	1,584 mm	25	1
1996	32.1 °C23 July 1996	-1.1 °C2 February 1996	16.7 °C	1,534 mm	33	1
1995	34.0 °C2 August 1995	0.1 °C31 January 1995	16.7 °C	1,448 mm	53	0
1994	34.8 °C15 July 1994	-0.3 °C24 January 1994	17.7 °C	1,548 mm	49	1
1993	30.8 °C27 August 1993	0.7 °C22 January 1993	16.6 °C	2,595 mm	6	0
1992	33.0 °C23 July 1992	1.1 °C16 January 1992	17.0 °C	2,166 mm	20	0
1991	33.5 °C8 September 1991	-1.1 °C25 February 1991	17.2 °C	2,046 mm	26	3
1990	33.2 °C5 August 1990	-1.7 °C26 January 1990	17.5 °C	2,531 mm	35	4
1989	30.8 °C10 August 1989	0.4 °C29 January 1989	17.1 °C	1,967 mm	5	0
1988	32.6 °C2 August 1988	-0.8 °C4 February 1988	16.5 °C	1,676 mm	16	3
1987	31.2 °C30 July 1987	-0.6 °C28 February 1987	17.0 °C	2,050 mm	21	2
1986	31.7 °C20 July 1986	-2.0 °C3 January 1986	16.3 °C	1,363 mm	32	6
1985	31.4 °C28 August 1985	-1.6 °C15 January 1985	16.7 °C	1,748 mm	10	5
1984	32.1 °C9 August 1984	-2.5 °C20 January 1984	16.1 °C	1,466 mm	24	12
1983	34.1 °C4 August 1983	-2.1 °C14 February 1983	16.8 °C	1,652 mm	31	7
1982	30.6 °C5 August 1982	-0.8 °C29 January 1982	16.5 °C	2,248 mm	5	4
1981	33.4 °C22 August 1981	-4.8 °C26 February 1981	16.2 °C	1,402 mm	22	4
1980	31.3 °C20 July 1980	-0.9 °C31 January 1980	16.2 °C	2,131 mm	5	4
1979	32.6 °C11 August 1979	-0.7 °C2 February 1979	16.6 °C	2,159 mm	20	1
1978	32.5 °C4 July 1978	-0.5 °C17 February 1978	16.8 °C	1,571 mm	19	3
1977	32.8 °C17 August 1977	-3.9 °C16 February 1977	16.8 °C	2,031 mm	26	11
1976	32.4 °C15 August 1976	-1.2 °C28 December 1976	16.1 °C	2,113 mm	13	6
1975	32.4 °C24 July 1975	-1.5 °C29 January 1975	16.6 °C	2,671 mm	14	1
1974	32.6 °C15 August 1974	-1.8 °C27 February 1974	16.2 °C	1,774 mm	13	6
1973	33.2 °C21 July 1973	-0.7 °C24 December 1973	16.4 °C	1,812 mm	28	3
1972	31.6 °C2 August 1972	-0.2 °C29 January 1972	16.5 °C	2,670 mm	12	1
1971	32.6 °C3 July 1971	-0.3 °C5 January 1971	16.4 °C	1,739 mm	27	3
1970	33.1 °C7 August 1970	-1.0 °C5 January 1970	16.1 °C	2,173 mm	24	6
1969	34.5 °C12 August 1969	-1.1 °C16 January 1969	16.4 °C	1,885 mm	30	5
1968	31.8 °C11 August 1968	-1.2 °C12 February 1968	16.2 °C	1,978 mm	12	6
1967	34.2 °C17 August 1967	-3.2 °C16 January 1967	16.5 °C	1,776 mm	44	13
1966	33.3 °C7 August 1966	-1.3 °C20 January 1966	16.0 °C	2,206 mm	13	7
1965	31.8 °C22 August 1965	-1.8 °C3 February 1965	15.3 °C	1,907 mm	11	5
1964	32.4 °C15 September 1964	-0.9 °C14 February 1964	17.1 °C	1,826 mm	41	2
1963	32.2 °C22 July 1963	-2.4 °C16 January 1963	16.3 °C	2,019 mm	21	10
1962	32.5 °C7 August 1962	-0.4 °C27 February 1962	16.3 °C	1,862 mm	22	1
1961	33.0 °C16 July 1961	-1.1 °C8 January 1961	17.0 °C	2,031 mm	32	7
1960	33.6 °C1 August 1960	-2.3 °C27 January 1960	16.6 °C	1,762 mm	23	9
1959	32.3 °C25 July 1959	-2.4 °C17 January 1959	17.1 °C	2,146 mm	33	8
1958	32.2 °C4 August 1958	-1.2 °C3 March 1958	16.8 °C	1,697 mm	22	2
1957	31.6 °C20 July 1957	-1.2 °C12 February 1957	16.0 °C	2,136 mm	9	10
1956	33.3 °C4 August 1956	-1.2 °C9 January 1956	16.0 °C	1,791 mm	27	6
1955	32.2 °C20 August 1955	-1.3 °C21 February 1955	16.6 °C	1,696 mm	15	9
1954	32.2 °C9 August 1954	-0.9 °C23 February 1954	16.6 °C	2,136 mm	11	1
1953	33.5 °C23 August 1953	-2.2 °C23 February 1953	16.3 °C	2,014 mm	28	5
1952	32.8 °C2 August 1952	-1.7 °C6 February 1952	16.0 °C	1,735 mm	9	4
1951	31.6 °C29 July 1951	-0.7 °C3 March 1951	15.8 °C	1,873 mm	10	8
1950	29.9 °C21 August 1950	-0.9 °C12 March 1950	15.8 °C	1,855 mm	0	2
1949	29.9 °C2 August 1949	-0.3 °C16 January 1949	15.5 °C	1,893 mm	0	1
1948	29.9 °C6 August 1948	0.1 °C30 January 1948	16.1 °C	1,641 mm	0	0
1947	31.5 °C11 August 1947	-2.5 °C16 February 1947	14.7 °C	1,180 mm	8	15
1946	33.6 °C14 July 1946	-0.3 °C10 January 1946	15.9 °C	1,473 mm	7	2
1945	30.7 °C11 August 1945	-1.3 °C18 January 1945	15.2 °C	2,112 mm	2	8
1944	30.9 °C30 August 1944	-0.4 °C17 February 1944	15.5 °C	1,198 mm	3	2
1943	30.9 °C15 August 1943	-2.1 °C12 January 1943	15.2 °C	1,362 mm	1	7
1942	33.3 °C5 August 1942	-2.7 °C12 February 1942	15.4 °C	869 mm	18	14
1941	29.5 °C16 August 1941	-3.3 °C31 January 1941	15.4 °C	1,569 mm	0	10
1940	30.8 °C28 July 1940	-1.9 °C27 January 1940	14.9 °C	971 mm	3	20

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

21.2 °C

+1.3 °C

Hot days (≥ 30 °C)

62 d/yr

+38

Frost days (< 0 °C)

5 d/yr

Annual rainfall

1762 mm

-143 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	10.6 °C	+0.7 °C	32 mm	-29 mm
Feb	9.2 °C	-1.5 °C	61 mm	-25 mm
Mar	15.8 °C	+1.7 °C	97 mm	-29 mm
Apr	19.4 °C	+0.7 °C	114 mm	-51 mm
May	22.3 °C	+0.1 °C	299 mm	+107 mm
Jun	27.0 °C	+2.1 °C	220 mm	-77 mm
Jul	30.4 °C	+1.8 °C	157 mm	-69 mm
Aug	30.9 °C	+1.4 °C	113 mm	-88 mm
Sep	29.6 °C	+2.5 °C	271 mm	+40 mm
Oct	25.2 °C	+2.6 °C	315 mm	+158 mm
Nov	18.5 °C	+0.8 °C	46 mm	-55 mm
Dec	14.4 °C	+2.0 °C	37 mm	-26 mm

The year's extremes

Hottest day

33.4 °C

3 Aug 2025

Coldest day

-1.2 °C

25 Feb 2025

Wettest day

96.5 mm

4 Sep 2025

Windiest day

38.2 km/h

25 Dec 2025

Strongest gust

88.2 km/h

13 Apr 2025

Hottest feels-like

41.3 °C

2 Aug 2025

Coldest feels-like

-7.8 °C

8 Feb 2025

Snowiest day

0.4 cm

10 Jan 2025

Sunniest day

13.9 h

20 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 Sukumo?

Sukumo has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.7 °C and it receives 1,905 mm of precipitation per year.

What is the hottest day ever recorded in Sukumo?

The hottest day measured in Sukumo between 1940 and 2025 was 11 August 2013, reaching 36.6 °C.

What is the coldest day in Sukumo?

The coldest day measured in Sukumo between 1940 and 2025 was 26 February 1981, at -4.8 °C.

Does it snow in Sukumo?

Yes. Sukumo gets on average 2.4 cm of snow per year and has around 4 frost days.

Has the climate of Sukumo warmed?

Yes: Sukumo warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Sukumo?

The wettest day measured in Sukumo between 1940 and 2025 was 29 July 1946, with 218 mm of rain in 24 hours.

What was the windiest day in Sukumo?

The windiest day measured in Sukumo between 1940 and 2025 was 30 August 2004, with winds reaching 75.7 km/h.

What is the warmest month in Sukumo?

The warmest month in Sukumo is August (26.6 °C on average); the coldest is January (6.7 °C).

How much does it rain in Sukumo?

Sukumo receives on average 1,905 mm of precipitation per year, spread over about 142 rainy days.

Is it sunny in Sukumo?

Sukumo 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 Sukumo?

The heaviest 24-hour snowfall measured in Sukumo between 1940 and 2025 was 19 January 1984, with 9.9 cm.

Are there tropical nights in Sukumo?

Yes: Sukumo has on average 100 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Sukumo?

In Sukumo, between 1940 and 2025, the highest apparent temperature reached 41.8 °C on 6 August 1994, and the lowest was -13.1 °C on 26 February 1981.

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