Shimabara climate — normals and trends

Q: What is the climate of Shimabara?

Shimabara has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.1 °C and it receives 1,986 mm of precipitation per year.

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

The hottest day measured in Shimabara between 1940 and 2025 was 17 July 1994, reaching 39.3 °C.

Q: What is the coldest day in Shimabara?

The coldest day measured in Shimabara between 1940 and 2025 was 23 January 1981, at -5.5 °C.

Q: Does it snow in Shimabara?

Yes. Shimabara gets on average 2.3 cm of snow per year and has around 4 frost days.

Q: Has the climate of Shimabara warmed?

Yes: Shimabara warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Shimabara?

The wettest day measured in Shimabara between 1940 and 2025 was 11 June 2008, with 191 mm of rain in 24 hours.

Q: What was the windiest day in Shimabara?

The windiest day measured in Shimabara between 1940 and 2025 was 27 September 1991, with winds reaching 74.1 km/h.

Q: What is the warmest month in Shimabara?

The warmest month in Shimabara is August (27.9 °C on average); the coldest is January (6.9 °C).

Q: How much does it rain in Shimabara?

Shimabara receives on average 1,986 mm of precipitation per year, spread over about 142 rainy days.

Q: Is it sunny in Shimabara?

Shimabara gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.

Shimabara (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.1 °C and it receives 1,986 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 (27.9 °C on average) and the coldest is January (6.9 °C). Rainfall peaks in June.

Shimabara averages 4 frost days, 52 hot days (≥ 30 °C) and 142 rainy days per year.

Shimabara has warmed by +2.4 °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 6 to 2 per year over the period.

The hottest day of the period reached 39.3 °C (on 17 July 1994) and the coldest -5.5 °C (on 23 January 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

ShimabaraNagasaki

coords: 32.78°, 130.37°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJuneDriest monthJanuary

Mean daily temperature

17.1°C

Average daily high

20.7°C

Average daily low

13.9°C

Annual rainfall

1,986mm

Sunshine / day

8.1h

Mean relative humidity

73%

Average peak wind

14.4km/h

Seasonal range

21.0°C

Frost days (< 0 °C)

4 d/yr

Hot days (≥ 30 °C)

52 d/yr

Rainy days (≥ 1 mm)

142 d/yr

Annual snowfall

2.3 cm

Average feels-like high

21.1 °C

Average feels-like low

13.5 °C

Average peak gust

38.7 km/h

Tropical nights (≥ 20 °C)

102 d/yr

Solar radiation

14.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.4 °C

since 1940

+0.3 °C per decade · r² = 0.74 · 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

39.3 °C

17 July 1994

Coldest day

-5.5 °C

23 January 1981

Wettest day

191 mm

11 June 2008

Windiest day

74.1 km/h

27 September 1991

Strongest gust

203.0 km/h

27 September 1991

Hottest feels-like

44.2 °C

30 July 2017

Coldest feels-like

-10.2 °C

26 February 1981

Snowiest day

13.8 cm

18 January 1984

Sunniest day

13.6 h

6 June 1960

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	37.3 °C1 August 2025	-2.0 °C25 February 2025	18.1 °C	1,816 mm	95	10
2024	38.6 °C8 August 2024	-0.2 °C23 December 2024	19.2 °C	2,471 mm	87	1
2023	36.8 °C5 August 2023	-2.6 °C25 January 2023	18.5 °C	2,227 mm	78	4
2022	35.6 °C29 July 2022	-0.8 °C19 January 2022	18.2 °C	1,531 mm	74	2
2021	35.9 °C5 August 2021	-1.7 °C8 January 2021	18.5 °C	2,383 mm	80	6
2020	35.2 °C18 August 2020	-0.1 °C31 December 2020	18.0 °C	2,299 mm	49	1
2019	35.5 °C3 August 2019	0.8 °C27 January 2019	18.3 °C	2,134 mm	60	0
2018	38.6 °C14 August 2018	-2.0 °C27 January 2018	18.2 °C	2,122 mm	67	8
2017	36.1 °C31 July 2017	-0.9 °C25 January 2017	17.8 °C	1,879 mm	62	1
2016	38.2 °C11 August 2016	-2.8 °C24 January 2016	18.6 °C	2,682 mm	68	2
2015	35.4 °C8 August 2015	0.4 °C9 February 2015	17.8 °C	2,495 mm	35	0
2014	36.2 °C30 July 2014	0.1 °C19 December 2014	17.6 °C	2,083 mm	33	0
2013	36.7 °C20 August 2013	-0.3 °C8 February 2013	18.1 °C	1,944 mm	74	1
2012	36.7 °C6 August 2012	-1.8 °C2 February 2012	17.5 °C	2,266 mm	55	3
2011	38.1 °C4 August 2011	-2.6 °C16 January 2011	17.8 °C	1,989 mm	70	3
2010	35.9 °C28 August 2010	0.5 °C13 January 2010	18.1 °C	2,237 mm	67	0
2009	35.3 °C6 August 2009	-0.7 °C24 January 2009	18.3 °C	1,637 mm	68	1
2008	37.5 °C6 August 2008	0.0 °C18 February 2008	17.9 °C	2,173 mm	60	0
2007	35.6 °C24 August 2007	-1.0 °C3 February 2007	18.7 °C	1,642 mm	79	2
2006	36.8 °C9 August 2006	0.0 °C5 February 2006	17.9 °C	2,339 mm	52	0
2005	35.5 °C25 July 2005	-1.6 °C18 December 2005	17.6 °C	1,409 mm	61	3
2004	36.2 °C14 August 2004	-1.6 °C22 January 2004	18.3 °C	2,185 mm	71	1
2003	34.7 °C6 August 2003	-0.1 °C5 January 2003	17.9 °C	2,014 mm	49	1
2002	34.6 °C27 July 2002	1.3 °C1 February 2002	18.0 °C	1,643 mm	69	0
2001	36.6 °C6 August 2001	-1.0 °C15 January 2001	17.9 °C	2,112 mm	61	2
2000	34.7 °C28 August 2000	0.5 °C28 January 2000	17.6 °C	2,008 mm	59	0
1999	34.3 °C9 August 1999	-0.1 °C4 February 1999	17.8 °C	2,037 mm	44	1
1998	36.1 °C19 September 1998	-0.7 °C24 January 1998	18.7 °C	2,116 mm	80	2
1997	35.4 °C2 September 1997	0.4 °C22 January 1997	17.7 °C	2,197 mm	57	0
1996	38.1 °C12 August 1996	-1.1 °C11 February 1996	17.3 °C	1,727 mm	61	4
1995	35.4 °C23 August 1995	-0.4 °C31 January 1995	16.9 °C	1,903 mm	52	2
1994	39.3 °C17 July 1994	-0.8 °C24 January 1994	18.3 °C	1,323 mm	77	1
1993	33.4 °C8 August 1993	0.4 °C25 February 1993	16.9 °C	3,013 mm	19	0
1992	34.2 °C28 August 1992	0.1 °C17 February 1992	17.4 °C	2,017 mm	51	0
1991	34.1 °C19 August 1991	-1.9 °C22 February 1991	17.2 °C	2,751 mm	52	4
1990	36.9 °C7 August 1990	-2.6 °C24 January 1990	18.1 °C	2,116 mm	69	5
1989	34.2 °C13 August 1989	0.5 °C28 January 1989	17.7 °C	1,988 mm	52	0
1988	36.1 °C9 August 1988	-0.3 °C4 March 1988	17.0 °C	2,051 mm	49	2
1987	34.0 °C29 August 1987	-0.4 °C3 March 1987	17.3 °C	2,314 mm	40	1
1986	35.3 °C14 August 1986	-1.5 °C25 February 1986	16.8 °C	1,891 mm	50	6
1985	36.9 °C29 August 1985	-1.4 °C15 January 1985	17.3 °C	1,936 mm	55	6
1984	37.8 °C10 August 1984	-1.9 °C6 January 1984	16.8 °C	1,657 mm	54	8
1983	35.4 °C5 August 1983	-2.5 °C14 February 1983	17.3 °C	2,135 mm	43	5
1982	33.3 °C31 July 1982	-1.5 °C30 January 1982	17.1 °C	2,055 mm	33	5
1981	33.8 °C1 September 1981	-5.5 °C23 January 1981	16.7 °C	1,796 mm	52	4
1980	32.3 °C20 July 1980	-1.4 °C19 January 1980	16.5 °C	2,666 mm	16	5
1979	35.5 °C16 August 1979	0.3 °C2 February 1979	17.1 °C	2,339 mm	46	0
1978	35.8 °C28 July 1978	-0.9 °C11 January 1978	17.4 °C	1,422 mm	70	5
1977	32.9 °C27 July 1977	-3.7 °C16 February 1977	17.0 °C	2,223 mm	50	14
1976	33.0 °C20 August 1976	-1.6 °C24 January 1976	16.4 °C	2,556 mm	39	7
1975	34.2 °C4 August 1975	-0.3 °C29 January 1975	17.2 °C	2,160 mm	51	1
1974	35.5 °C19 August 1974	-2.2 °C28 February 1974	16.5 °C	1,681 mm	40	6
1973	34.9 °C17 July 1973	-1.0 °C24 December 1973	17.0 °C	1,771 mm	56	1
1972	35.0 °C17 August 1972	1.0 °C1 March 1972	16.9 °C	2,761 mm	42	0
1971	35.2 °C1 August 1971	-1.4 °C5 January 1971	16.8 °C	2,186 mm	44	5
1970	34.9 °C12 August 1970	-1.7 °C5 January 1970	16.5 °C	2,024 mm	56	9
1969	35.5 °C18 August 1969	-1.6 °C7 February 1969	16.8 °C	1,902 mm	54	4
1968	34.8 °C13 August 1968	-0.8 °C12 February 1968	16.6 °C	2,104 mm	46	8
1967	37.0 °C1 September 1967	-2.6 °C16 January 1967	17.2 °C	1,511 mm	77	11
1966	36.2 °C9 August 1966	-1.8 °C5 February 1966	16.5 °C	2,141 mm	49	5
1965	33.8 °C5 August 1965	-1.2 °C3 February 1965	15.8 °C	2,060 mm	34	4
1964	35.9 °C17 August 1964	-2.2 °C14 February 1964	17.5 °C	1,848 mm	71	2
1963	33.6 °C2 August 1963	-1.9 °C16 January 1963	16.5 °C	1,953 mm	54	14
1962	34.5 °C30 July 1962	-0.3 °C27 February 1962	16.5 °C	2,263 mm	46	1
1961	34.6 °C21 July 1961	-1.6 °C18 January 1961	17.4 °C	1,733 mm	80	10
1960	37.5 °C21 August 1960	-1.5 °C30 January 1960	17.1 °C	1,705 mm	63	9
1959	34.9 °C3 August 1959	-1.9 °C17 January 1959	17.2 °C	2,042 mm	53	8
1958	36.6 °C22 July 1958	-0.5 °C3 March 1958	17.3 °C	1,760 mm	59	2
1957	34.7 °C17 August 1957	-1.9 °C28 February 1957	16.2 °C	2,441 mm	34	8
1956	36.6 °C4 August 1956	-2.1 °C13 March 1956	16.2 °C	1,932 mm	46	12
1955	34.5 °C12 August 1955	-1.5 °C4 January 1955	17.0 °C	1,770 mm	51	8
1954	36.3 °C15 August 1954	-0.6 °C23 February 1954	17.1 °C	2,095 mm	40	2
1953	34.9 °C16 August 1953	-2.3 °C17 January 1953	16.8 °C	2,167 mm	51	2
1952	34.0 °C17 August 1952	-1.7 °C6 February 1952	16.3 °C	2,145 mm	38	6
1951	35.7 °C17 August 1951	-0.8 °C8 February 1951	16.3 °C	1,967 mm	36	2
1950	33.3 °C17 July 1950	-0.4 °C7 January 1950	16.3 °C	1,625 mm	31	2
1949	32.7 °C9 August 1949	-0.1 °C16 January 1949	16.0 °C	2,147 mm	22	1
1948	32.3 °C20 August 1948	0.1 °C7 February 1948	16.6 °C	1,819 mm	20	0
1947	32.2 °C13 August 1947	-2.5 °C16 February 1947	15.2 °C	1,373 mm	38	11
1946	36.3 °C26 July 1946	-1.1 °C10 January 1946	16.4 °C	1,257 mm	36	3
1945	33.5 °C1 August 1945	-1.2 °C18 January 1945	15.8 °C	2,460 mm	33	6
1944	32.6 °C3 September 1944	-0.3 °C16 February 1944	16.1 °C	1,204 mm	40	1
1943	31.7 °C15 August 1943	-1.8 °C12 January 1943	15.8 °C	1,136 mm	14	6
1942	36.5 °C1 August 1942	-2.5 °C13 February 1942	16.2 °C	1,020 mm	61	10
1941	32.9 °C7 August 1941	-2.6 °C1 February 1941	15.8 °C	1,316 mm	17	8
1940	32.1 °C31 July 1940	-1.5 °C26 January 1940	15.6 °C	1,323 mm	24	7

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

22.2 °C

+1.5 °C

Hot days (≥ 30 °C)

95 d/yr

+43

Frost days (< 0 °C)

10 d/yr

Annual rainfall

1816 mm

-170 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	10.5 °C	+0.6 °C	27 mm	-38 mm
Feb	9.3 °C	-1.7 °C	50 mm	-36 mm
Mar	15.9 °C	+1.3 °C	158 mm	+32 mm
Apr	20.6 °C	+1.0 °C	94 mm	-63 mm
May	23.7 °C	+0.1 °C	318 mm	+124 mm
Jun	28.0 °C	+1.8 °C	451 mm	+71 mm
Jul	33.8 °C	+3.7 °C	89 mm	-232 mm
Aug	33.1 °C	+1.5 °C	237 mm	+52 mm
Sep	31.0 °C	+2.7 °C	202 mm	+1 mm
Oct	26.2 °C	+3.0 °C	81 mm	-29 mm
Nov	18.7 °C	+0.9 °C	35 mm	-55 mm
Dec	14.3 °C	+2.0 °C	74 mm	+4 mm

The year's extremes

Hottest day

37.3 °C

1 Aug 2025

Coldest day

-2.0 °C

25 Feb 2025

Wettest day

101.1 mm

24 May 2025

Windiest day

32.3 km/h

14 Apr 2025

Strongest gust

95.0 km/h

16 Jun 2025

Hottest feels-like

42.6 °C

28 Aug 2025

Coldest feels-like

-7.0 °C

8 Feb 2025

Snowiest day

0.1 cm

7 Feb 2025

Sunniest day

13.5 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 Shimabara?

Shimabara has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.1 °C and it receives 1,986 mm of precipitation per year.

What is the hottest day ever recorded in Shimabara?

The hottest day measured in Shimabara between 1940 and 2025 was 17 July 1994, reaching 39.3 °C.

What is the coldest day in Shimabara?

The coldest day measured in Shimabara between 1940 and 2025 was 23 January 1981, at -5.5 °C.

Does it snow in Shimabara?

Yes. Shimabara gets on average 2.3 cm of snow per year and has around 4 frost days.

Has the climate of Shimabara warmed?

Yes: Shimabara warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Shimabara?

The wettest day measured in Shimabara between 1940 and 2025 was 11 June 2008, with 191 mm of rain in 24 hours.

What was the windiest day in Shimabara?

The windiest day measured in Shimabara between 1940 and 2025 was 27 September 1991, with winds reaching 74.1 km/h.

What is the warmest month in Shimabara?

The warmest month in Shimabara is August (27.9 °C on average); the coldest is January (6.9 °C).

How much does it rain in Shimabara?

Shimabara receives on average 1,986 mm of precipitation per year, spread over about 142 rainy days.

Is it sunny in Shimabara?

Shimabara gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.

What is the biggest single-day snowfall in Shimabara?

The heaviest 24-hour snowfall measured in Shimabara between 1940 and 2025 was 18 January 1984, with 13.8 cm.

Are there tropical nights in Shimabara?

Yes: Shimabara has on average 102 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Shimabara?

In Shimabara, between 1940 and 2025, the highest apparent temperature reached 44.2 °C on 30 July 2017, and the lowest was -10.2 °C on 26 February 1981.

Compare Shimabara with another city

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