Aira climate — normals and trends

Q: What is the climate of Aira?

Aira has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.2 °C and it receives 2,115 mm of precipitation per year.

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

The hottest day measured in Aira between 1940 and 2025 was 18 August 1967, reaching 35.6 °C.

Q: What is the coldest day in Aira?

The coldest day measured in Aira between 1940 and 2025 was 19 February 1977, at -3.5 °C.

Q: Does it snow in Aira?

Yes. Aira gets on average 1.7 cm of snow per year and has around 3 frost days.

Q: Has the climate of Aira warmed?

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

Q: What is the wettest day in Aira?

The wettest day measured in Aira between 1940 and 2025 was 19 July 1976, with 241 mm of rain in 24 hours.

Q: What was the windiest day in Aira?

The windiest day measured in Aira between 1940 and 2025 was 7 September 2004, with winds reaching 65.7 km/h.

Q: What is the warmest month in Aira?

The warmest month in Aira is August (27.1 °C on average); the coldest is January (7.3 °C).

Q: How much does it rain in Aira?

Aira receives on average 2,115 mm of precipitation per year, spread over about 158 rainy days.

Q: Is it sunny in Aira?

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

Aira (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.2 °C and it receives 2,115 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 (27.1 °C on average) and the coldest is January (7.3 °C). Rainfall peaks in June.

Aira averages 3 frost days, 41 hot days (≥ 30 °C) and 158 rainy days per year.

Aira has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.

The number of frost days there went from about 5 to 1 per year over the period.

The hottest day of the period reached 35.6 °C (on 18 August 1967) and the coldest -3.5 °C (on 19 February 1977).

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

AiraKagoshima

coords: 31.77°, 130.59°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJuneDriest monthDecember

Mean daily temperature

17.2°C

Average daily high

20.7°C

Average daily low

14.0°C

Annual rainfall

2,115mm

Sunshine / day

8.1h

Mean relative humidity

77%

Average peak wind

14.5km/h

Seasonal range

19.8°C

Frost days (< 0 °C)

3 d/yr

Hot days (≥ 30 °C)

41 d/yr

Rainy days (≥ 1 mm)

158 d/yr

Annual snowfall

1.7 cm

Average feels-like high

21.4 °C

Average feels-like low

13.9 °C

Average peak gust

37.3 km/h

Tropical nights (≥ 20 °C)

108 d/yr

Solar radiation

14.1 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.4 °C

since 1940

+0.3 °C per decade · r² = 0.76 · 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

35.6 °C

18 August 1967

Coldest day

-3.5 °C

19 February 1977

Wettest day

241 mm

19 July 1976

Windiest day

65.7 km/h

7 September 2004

Strongest gust

176.8 km/h

7 September 2004

Hottest feels-like

43.4 °C

4 August 2024

Coldest feels-like

-9.0 °C

25 January 2023

Snowiest day

3.8 cm

23 January 1998

Sunniest day

13.7 h

15 June 1956

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	34.3 °C1 August 2025	-1.7 °C25 February 2025	18.1 °C	1,832 mm	80	5
2024	35.3 °C5 August 2024	1.3 °C23 December 2024	19.2 °C	2,712 mm	79	0
2023	33.7 °C20 August 2023	-2.1 °C25 January 2023	18.5 °C	2,356 mm	70	2
2022	34.0 °C30 August 2022	0.3 °C19 January 2022	18.3 °C	2,064 mm	70	0
2021	33.7 °C29 July 2021	-1.2 °C9 January 2021	18.4 °C	2,294 mm	59	2
2020	35.0 °C17 August 2020	1.0 °C31 December 2020	18.2 °C	2,801 mm	41	0
2019	33.8 °C2 August 2019	1.0 °C27 January 2019	18.4 °C	2,065 mm	48	0
2018	34.8 °C19 July 2018	-2.1 °C27 January 2018	18.1 °C	2,420 mm	58	6
2017	35.6 °C31 July 2017	-1.3 °C25 January 2017	17.7 °C	2,154 mm	58	2
2016	34.7 °C10 August 2016	-2.1 °C25 January 2016	18.6 °C	3,060 mm	65	3
2015	34.6 °C8 August 2015	-0.1 °C18 January 2015	17.9 °C	2,916 mm	29	1
2014	32.8 °C30 July 2014	0.0 °C19 December 2014	17.6 °C	2,298 mm	34	0
2013	34.3 °C19 August 2013	0.5 °C29 January 2013	18.1 °C	1,783 mm	63	0
2012	33.1 °C18 August 2012	-2.0 °C3 February 2012	17.4 °C	2,741 mm	41	2
2011	34.0 °C1 September 2011	-1.5 °C16 January 2011	17.5 °C	2,258 mm	54	2
2010	33.4 °C3 August 2010	1.1 °C31 December 2010	18.1 °C	2,434 mm	55	0
2009	32.8 °C11 August 2009	0.6 °C24 January 2009	18.1 °C	1,878 mm	54	0
2008	33.9 °C1 August 2008	-0.3 °C18 February 2008	17.9 °C	1,972 mm	55	1
2007	33.6 °C26 August 2007	-0.5 °C3 February 2007	18.4 °C	1,921 mm	59	1
2006	34.2 °C9 August 2006	0.4 °C4 February 2006	18.1 °C	2,266 mm	50	0
2005	33.5 °C24 July 2005	-0.8 °C27 February 2005	17.5 °C	1,809 mm	56	2
2004	33.2 °C13 August 2004	-0.2 °C22 January 2004	18.3 °C	2,115 mm	55	1
2003	33.2 °C21 August 2003	0.7 °C25 January 2003	18.1 °C	2,152 mm	43	0
2002	33.5 °C24 July 2002	1.6 °C14 December 2002	18.1 °C	1,861 mm	49	0
2001	33.9 °C26 July 2001	-0.1 °C15 January 2001	18.0 °C	2,123 mm	56	1
2000	33.5 °C12 August 2000	0.8 °C8 February 2000	17.8 °C	1,989 mm	44	0
1999	31.9 °C10 August 1999	-0.2 °C4 February 1999	17.8 °C	2,253 mm	29	1
1998	33.1 °C21 August 1998	-1.7 °C25 January 1998	18.8 °C	2,500 mm	66	2
1997	32.6 °C31 August 1997	0.1 °C23 January 1997	17.7 °C	2,167 mm	39	0
1996	33.6 °C5 August 1996	-1.9 °C11 February 1996	17.3 °C	1,926 mm	48	3
1995	33.1 °C23 August 1995	-1.4 °C31 December 1995	17.0 °C	1,974 mm	53	2
1994	35.1 °C17 July 1994	-0.6 °C24 January 1994	18.1 °C	1,595 mm	71	1
1993	32.1 °C12 August 1993	-0.2 °C25 February 1993	17.1 °C	3,618 mm	16	1
1992	32.8 °C24 July 1992	-0.1 °C2 February 1992	17.5 °C	2,105 mm	40	1
1991	33.1 °C18 August 1991	-1.2 °C22 February 1991	17.6 °C	2,408 mm	44	3
1990	34.2 °C30 July 1990	-1.3 °C26 January 1990	18.0 °C	2,569 mm	63	2
1989	32.4 °C13 August 1989	0.8 °C29 January 1989	17.6 °C	2,073 mm	41	0
1988	32.7 °C12 July 1988	-0.3 °C4 February 1988	17.2 °C	1,857 mm	39	1
1987	32.8 °C14 July 1987	0.3 °C26 January 1987	17.5 °C	2,353 mm	32	0
1986	33.0 °C16 August 1986	-1.5 °C25 February 1986	16.8 °C	1,670 mm	42	4
1985	32.8 °C28 August 1985	-1.9 °C15 January 1985	17.3 °C	1,968 mm	44	5
1984	34.4 °C9 August 1984	-2.0 °C6 January 1984	16.8 °C	1,653 mm	46	7
1983	34.2 °C4 August 1983	-1.9 °C14 February 1983	17.3 °C	2,536 mm	37	6
1982	32.6 °C31 July 1982	-2.0 °C30 January 1982	17.1 °C	2,178 mm	27	3
1981	33.6 °C19 August 1981	-2.4 °C27 February 1981	16.9 °C	1,714 mm	44	5
1980	32.1 °C20 July 1980	-2.6 °C10 February 1980	16.8 °C	2,484 mm	15	6
1979	33.6 °C10 August 1979	1.1 °C17 January 1979	17.0 °C	2,260 mm	48	0
1978	32.8 °C20 July 1978	-1.4 °C11 January 1978	17.2 °C	1,679 mm	57	3
1977	33.0 °C28 July 1977	-3.5 °C19 February 1977	17.2 °C	2,105 mm	43	10
1976	32.8 °C20 August 1976	-2.9 °C24 January 1976	16.6 °C	2,805 mm	29	5
1975	32.5 °C20 August 1975	-0.8 °C24 February 1975	17.1 °C	2,235 mm	38	1
1974	33.4 °C15 August 1974	-2.5 °C28 February 1974	16.6 °C	1,966 mm	32	7
1973	32.9 °C8 August 1973	-0.2 °C25 December 1973	16.9 °C	2,057 mm	37	1
1972	32.2 °C2 August 1972	0.2 °C2 April 1972	17.0 °C	2,766 mm	31	0
1971	33.8 °C1 August 1971	-1.1 °C11 February 1971	16.9 °C	2,389 mm	35	4
1970	33.1 °C5 August 1970	-1.7 °C18 January 1970	16.5 °C	2,344 mm	39	7
1969	33.5 °C8 August 1969	-1.7 °C7 February 1969	16.8 °C	2,419 mm	50	3
1968	32.8 °C25 July 1968	-1.7 °C12 February 1968	16.5 °C	2,279 mm	32	8
1967	35.6 °C18 August 1967	-1.3 °C16 January 1967	16.9 °C	1,781 mm	55	8
1966	33.3 °C8 August 1966	-1.0 °C6 February 1966	16.5 °C	2,228 mm	30	2
1965	31.9 °C20 August 1965	-0.5 °C4 February 1965	15.7 °C	2,175 mm	20	1
1964	33.0 °C25 July 1964	-1.1 °C14 February 1964	17.5 °C	2,228 mm	60	1
1963	32.4 °C20 July 1963	-1.2 °C14 January 1963	16.6 °C	1,794 mm	38	7
1962	33.5 °C26 July 1962	-0.5 °C2 February 1962	16.5 °C	2,026 mm	36	1
1961	32.9 °C17 July 1961	-2.0 °C20 January 1961	17.4 °C	1,915 mm	63	14
1960	33.1 °C31 July 1960	-2.2 °C25 January 1960	17.1 °C	1,813 mm	52	8
1959	33.1 °C29 August 1959	-1.2 °C7 January 1959	17.2 °C	2,314 mm	39	10
1958	33.3 °C6 August 1958	-1.3 °C19 January 1958	17.1 °C	1,730 mm	54	3
1957	31.9 °C1 August 1957	-1.6 °C8 January 1957	16.3 °C	2,415 mm	28	9
1956	33.9 °C4 August 1956	-1.7 °C13 March 1956	16.4 °C	2,006 mm	43	9
1955	33.2 °C20 July 1955	-1.6 °C8 January 1955	17.0 °C	1,954 mm	41	8
1954	33.2 °C23 August 1954	-1.1 °C27 January 1954	17.1 °C	2,263 mm	33	3
1953	33.4 °C15 August 1953	-1.9 °C17 January 1953	16.8 °C	2,161 mm	41	5
1952	32.2 °C3 August 1952	-2.0 °C6 February 1952	16.6 °C	2,077 mm	19	2
1951	32.8 °C15 August 1951	-0.6 °C14 January 1951	16.4 °C	2,056 mm	27	1
1950	31.4 °C3 August 1950	0.7 °C25 January 1950	16.4 °C	1,759 mm	7	0
1949	30.7 °C4 August 1949	0.6 °C17 January 1949	16.1 °C	2,335 mm	5	0
1948	31.4 °C20 August 1948	0.6 °C18 January 1948	16.5 °C	1,964 mm	6	0
1947	32.0 °C14 August 1947	-1.1 °C16 February 1947	15.4 °C	1,314 mm	20	2
1946	33.8 °C26 July 1946	0.3 °C19 January 1946	16.5 °C	1,450 mm	19	0
1945	31.2 °C8 August 1945	0.0 °C18 January 1945	15.8 °C	2,222 mm	16	0
1944	31.3 °C14 August 1944	-0.2 °C16 February 1944	16.2 °C	1,482 mm	12	1
1943	31.4 °C15 August 1943	-0.4 °C1 February 1943	15.8 °C	1,185 mm	4	3
1942	34.6 °C4 August 1942	-1.8 °C13 February 1942	16.2 °C	1,358 mm	49	5
1941	31.7 °C19 August 1941	-1.7 °C1 February 1941	16.1 °C	1,499 mm	12	3
1940	31.9 °C29 July 1940	-0.9 °C5 February 1940	15.6 °C	1,247 mm	7	3

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

22.0 °C

+1.3 °C

Hot days (≥ 30 °C)

80 d/yr

+39

Frost days (< 0 °C)

5 d/yr

Annual rainfall

1832 mm

-283 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	11.3 °C	+0.6 °C	49 mm	-26 mm
Feb	10.4 °C	-1.3 °C	73 mm	-26 mm
Mar	16.0 °C	+1.1 °C	147 mm	+3 mm
Apr	20.0 °C	+0.5 °C	137 mm	-47 mm
May	23.2 °C	+0.1 °C	348 mm	+119 mm
Jun	28.0 °C	+2.3 °C	336 mm	-112 mm
Jul	31.1 °C	+1.7 °C	81 mm	-211 mm
Aug	31.5 °C	+1.2 °C	278 mm	+91 mm
Sep	30.5 °C	+2.4 °C	150 mm	-39 mm
Oct	26.8 °C	+3.3 °C	133 mm	+27 mm
Nov	19.1 °C	+0.7 °C	44 mm	-48 mm
Dec	15.0 °C	+2.0 °C	57 mm	-15 mm

The year's extremes

Hottest day

34.3 °C

1 Aug 2025

Coldest day

-1.7 °C

25 Feb 2025

Wettest day

93.0 mm

21 May 2025

Windiest day

32.0 km/h

16 Mar 2025

Strongest gust

82.8 km/h

14 Apr 2025

Hottest feels-like

42.4 °C

2 Jul 2025

Coldest feels-like

-6.3 °C

8 Feb 2025

Snowiest day

0.3 cm

10 Jan 2025

Sunniest day

13.5 h

6 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 Aira?

Aira has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.2 °C and it receives 2,115 mm of precipitation per year.

What is the hottest day ever recorded in Aira?

The hottest day measured in Aira between 1940 and 2025 was 18 August 1967, reaching 35.6 °C.

What is the coldest day in Aira?

The coldest day measured in Aira between 1940 and 2025 was 19 February 1977, at -3.5 °C.

Does it snow in Aira?

Yes. Aira gets on average 1.7 cm of snow per year and has around 3 frost days.

Has the climate of Aira warmed?

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

What is the wettest day in Aira?

The wettest day measured in Aira between 1940 and 2025 was 19 July 1976, with 241 mm of rain in 24 hours.

What was the windiest day in Aira?

The windiest day measured in Aira between 1940 and 2025 was 7 September 2004, with winds reaching 65.7 km/h.

What is the warmest month in Aira?

The warmest month in Aira is August (27.1 °C on average); the coldest is January (7.3 °C).

How much does it rain in Aira?

Aira receives on average 2,115 mm of precipitation per year, spread over about 158 rainy days.

Is it sunny in Aira?

Aira 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 Aira?

The heaviest 24-hour snowfall measured in Aira between 1940 and 2025 was 23 January 1998, with 3.8 cm.

Are there tropical nights in Aira?

Yes: Aira has on average 108 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Aira?

In Aira, between 1940 and 2025, the highest apparent temperature reached 43.4 °C on 4 August 2024, and the lowest was -9.0 °C on 25 January 2023.

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