Nanjō climate — normals and trends

Q: What is the climate of Nanjō?

Nanjō has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 22.9 °C and it receives 1,677 mm of precipitation per year.

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

The hottest day measured in Nanjō between 1940 and 2025 was 20 July 2024, reaching 30.7 °C.

Q: What is the coldest day in Nanjō?

The coldest day measured in Nanjō between 1940 and 2025 was 25 January 2016, at 10.1 °C.

Q: Does it snow in Nanjō?

Almost never: Nanjō sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Nanjō warmed?

Yes: Nanjō warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Nanjō?

The wettest day measured in Nanjō between 1940 and 2025 was 11 October 2014, with 235 mm of rain in 24 hours.

Q: What was the windiest day in Nanjō?

The windiest day measured in Nanjō between 1940 and 2025 was 3 October 1961, with winds reaching 121.7 km/h.

Q: What is the warmest month in Nanjō?

The warmest month in Nanjō is July (27.8 °C on average); the coldest is January (17.6 °C).

Q: How much does it rain in Nanjō?

Nanjō receives on average 1,677 mm of precipitation per year, spread over about 163 rainy days.

Q: Is it sunny in Nanjō?

Nanjō gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.

Nanjō (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 22.9 °C and it receives 1,677 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 July (27.8 °C on average) and the coldest is January (17.6 °C). Rainfall peaks in May.

Nanjō averages 0 frost days, 1 hot days (≥ 30 °C) and 163 rainy days per year.

Nanjō has warmed by +1.0 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.

The hottest day of the period reached 30.7 °C (on 20 July 2024) and the coldest 10.1 °C (on 25 January 2016).

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

NanjōOkinawa

coords: 26.14°, 127.77°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthMayDriest monthJanuary

Mean daily temperature

22.9°C

Average daily high

23.7°C

Average daily low

22.2°C

Annual rainfall

1,677mm

Sunshine / day

8.7h

Mean relative humidity

77%

Average peak wind

31.5km/h

Seasonal range

10.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

1 d/yr

Rainy days (≥ 1 mm)

163 d/yr

Annual snowfall

0.0 cm

Average feels-like high

24.8 °C

Average feels-like low

21.5 °C

Average peak gust

43.6 km/h

Tropical nights (≥ 20 °C)

249 d/yr

Solar radiation

15.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.0 °C

since 1940

+0.1 °C per decade · r² = 0.41 · 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

30.7 °C

20 July 2024

Coldest day

10.1 °C

25 January 2016

Wettest day

235 mm

11 October 2014

Windiest day

121.7 km/h

3 October 1961

Strongest gust

178.9 km/h

3 October 1961

Hottest feels-like

38.8 °C

11 August 2024

Coldest feels-like

0.6 °C

24 January 2016

Sunniest day

13.0 h

2 May 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	30.1 °C26 September 2025	12.2 °C8 February 2025	23.7 °C	1,579 mm	2
2024	30.7 °C20 July 2024	13.8 °C24 January 2024	24.2 °C	1,975 mm	23
2023	29.8 °C23 July 2023	11.8 °C24 January 2023	23.7 °C	1,682 mm	0
2022	30.2 °C13 August 2022	14.3 °C20 February 2022	23.7 °C	2,509 mm	7
2021	29.6 °C10 September 2021	12.7 °C9 January 2021	23.5 °C	1,584 mm	0
2020	29.7 °C12 August 2020	13.2 °C31 December 2020	23.6 °C	2,365 mm	0
2019	29.6 °C26 July 2019	15.0 °C26 January 2019	23.8 °C	2,266 mm	0
2018	29.2 °C9 August 2018	11.9 °C5 February 2018	23.4 °C	2,207 mm	0
2017	30.4 °C1 August 2017	13.0 °C10 February 2017	23.5 °C	1,441 mm	22
2016	30.2 °C21 August 2016	10.1 °C25 January 2016	23.9 °C	2,012 mm	7
2015	29.3 °C4 July 2015	12.5 °C9 February 2015	23.3 °C	1,579 mm	0
2014	29.9 °C4 July 2014	12.9 °C22 January 2014	23.0 °C	2,023 mm	0
2013	30.0 °C6 August 2013	13.4 °C18 January 2013	23.2 °C	1,579 mm	1
2012	29.4 °C23 August 2012	13.0 °C18 February 2012	22.9 °C	2,126 mm	0
2011	29.2 °C23 July 2011	12.1 °C16 January 2011	22.8 °C	1,886 mm	0
2010	29.3 °C2 August 2010	12.0 °C10 March 2010	23.2 °C	2,302 mm	0
2009	29.9 °C29 July 2009	12.7 °C10 January 2009	23.2 °C	1,492 mm	0
2008	29.3 °C19 August 2008	13.2 °C13 February 2008	23.1 °C	1,231 mm	0
2007	30.0 °C24 July 2007	13.0 °C29 January 2007	23.3 °C	2,047 mm	2
2006	29.4 °C6 July 2006	12.8 °C7 January 2006	23.3 °C	1,653 mm	0
2005	29.4 °C2 August 2005	10.3 °C6 March 2005	22.9 °C	1,574 mm	0
2004	29.3 °C5 August 2004	12.2 °C22 January 2004	23.2 °C	1,542 mm	0
2003	30.5 °C6 August 2003	12.0 °C5 January 2003	23.0 °C	1,251 mm	4
2002	29.0 °C26 August 2002	13.3 °C30 January 2002	22.9 °C	1,681 mm	0
2001	30.1 °C23 July 2001	12.6 °C9 March 2001	23.3 °C	1,913 mm	1
2000	28.9 °C21 August 2000	12.8 °C9 February 2000	23.0 °C	2,512 mm	0
1999	29.4 °C19 July 1999	12.9 °C4 February 1999	23.2 °C	1,730 mm	0
1998	30.2 °C14 August 1998	13.1 °C25 January 1998	24.2 °C	2,176 mm	5
1997	29.0 °C18 August 1997	13.5 °C12 February 1997	22.8 °C	1,616 mm	0
1996	29.6 °C27 July 1996	11.5 °C10 February 1996	22.8 °C	1,604 mm	0
1995	29.5 °C7 September 1995	12.5 °C5 February 1995	22.7 °C	1,420 mm	0
1994	29.8 °C27 July 1994	13.7 °C10 February 1994	23.0 °C	1,330 mm	0
1993	29.8 °C17 July 1993	12.3 °C28 January 1993	23.1 °C	1,275 mm	0
1992	29.1 °C21 August 1992	12.7 °C1 February 1992	22.9 °C	1,721 mm	0
1991	29.7 °C9 July 1991	12.7 °C24 February 1991	23.2 °C	1,216 mm	0
1990	29.6 °C17 August 1990	12.8 °C24 January 1990	23.2 °C	1,603 mm	0
1989	29.5 °C10 August 1989	12.2 °C8 March 1989	22.8 °C	1,371 mm	0
1988	29.8 °C25 July 1988	13.6 °C24 January 1988	23.1 °C	1,954 mm	0
1987	29.9 °C28 August 1987	11.0 °C4 February 1987	23.1 °C	1,517 mm	0
1986	28.9 °C30 July 1986	11.2 °C2 March 1986	22.3 °C	1,208 mm	0
1985	28.4 °C27 July 1985	12.4 °C30 January 1985	22.6 °C	1,637 mm	0
1984	29.4 °C27 July 1984	11.2 °C7 February 1984	22.5 °C	1,565 mm	0
1983	29.3 °C1 August 1983	12.3 °C19 February 1983	23.1 °C	1,718 mm	0
1982	29.0 °C22 July 1982	11.3 °C19 January 1982	22.7 °C	1,666 mm	0
1981	29.1 °C2 August 1981	11.5 °C27 February 1981	22.5 °C	1,504 mm	0
1980	29.8 °C26 July 1980	12.3 °C31 January 1980	23.0 °C	1,970 mm	0
1979	29.3 °C18 July 1979	11.8 °C2 February 1979	22.8 °C	2,087 mm	0
1978	29.1 °C5 July 1978	10.3 °C18 February 1978	22.6 °C	2,414 mm	0
1977	29.6 °C14 July 1977	10.6 °C17 February 1977	23.0 °C	1,677 mm	0
1976	28.7 °C16 August 1976	12.8 °C11 January 1976	22.5 °C	1,728 mm	0
1975	28.6 °C30 July 1975	11.7 °C21 February 1975	22.7 °C	1,952 mm	0
1974	29.2 °C17 August 1974	11.6 °C27 February 1974	22.8 °C	1,903 mm	0
1973	29.3 °C30 July 1973	12.6 °C24 December 1973	22.7 °C	2,150 mm	0
1972	29.0 °C17 July 1972	11.3 °C1 March 1972	22.8 °C	2,034 mm	0
1971	30.0 °C21 July 1971	11.4 °C5 February 1971	22.8 °C	1,519 mm	1
1970	29.3 °C27 July 1970	11.6 °C31 January 1970	22.7 °C	2,041 mm	0
1969	29.4 °C31 July 1969	12.0 °C6 February 1969	23.0 °C	2,072 mm	0
1968	28.8 °C21 July 1968	10.8 °C21 February 1968	22.2 °C	1,562 mm	0
1967	29.1 °C14 August 1967	10.7 °C16 January 1967	22.7 °C	1,608 mm	0
1966	29.6 °C8 August 1966	13.8 °C27 December 1966	23.2 °C	2,316 mm	0
1965	29.2 °C22 July 1965	12.1 °C3 February 1965	22.5 °C	1,598 mm	0
1964	29.1 °C15 July 1964	12.7 °C2 February 1964	23.3 °C	1,571 mm	0
1963	29.9 °C4 September 1963	10.8 °C25 January 1963	22.3 °C	897 mm	0
1962	29.3 °C29 July 1962	11.6 °C27 January 1962	22.5 °C	1,085 mm	0
1961	29.0 °C23 August 1961	10.8 °C1 February 1961	22.9 °C	1,373 mm	0
1960	29.2 °C27 July 1960	11.0 °C30 December 1960	22.8 °C	1,592 mm	0
1959	29.1 °C8 August 1959	11.0 °C17 January 1959	23.1 °C	1,972 mm	0
1958	29.1 °C14 August 1958	11.5 °C13 February 1958	22.7 °C	1,308 mm	0
1957	28.9 °C20 August 1957	11.9 °C11 February 1957	22.5 °C	1,605 mm	0
1956	29.4 °C11 July 1956	10.9 °C29 February 1956	22.6 °C	1,669 mm	0
1955	28.6 °C22 July 1955	10.4 °C21 February 1955	22.9 °C	1,599 mm	0
1954	30.1 °C17 August 1954	13.4 °C6 February 1954	23.3 °C	1,220 mm	1
1953	29.0 °C24 July 1953	12.9 °C22 February 1953	23.0 °C	1,142 mm	0
1952	29.0 °C9 August 1952	12.4 °C19 February 1952	23.5 °C	1,276 mm	0
1951	29.0 °C20 August 1951	12.6 °C21 January 1951	22.9 °C	1,977 mm	0
1950	28.8 °C19 July 1950	12.4 °C12 March 1950	22.8 °C	1,635 mm	0
1949	29.3 °C24 July 1949	12.1 °C9 January 1949	22.9 °C	1,620 mm	0
1948	28.6 °C19 July 1948	12.0 °C27 January 1948	22.7 °C	853 mm	0
1947	29.0 °C5 August 1947	11.9 °C16 February 1947	22.2 °C	1,598 mm	0
1946	28.7 °C31 August 1946	13.2 °C8 February 1946	23.0 °C	1,004 mm	0
1945	29.0 °C3 September 1945	13.0 °C8 March 1945	22.4 °C	1,527 mm	0
1944	28.2 °C23 July 1944	12.7 °C10 March 1944	22.4 °C	1,530 mm	0
1943	28.6 °C1 August 1943	11.1 °C12 January 1943	22.2 °C	839 mm	0
1942	29.2 °C12 August 1942	12.6 °C17 January 1942	22.8 °C	1,504 mm	0
1941	28.9 °C15 July 1941	11.6 °C1 February 1941	22.7 °C	1,847 mm	0
1940	27.9 °C28 July 1940	11.3 °C25 January 1940	21.9 °C	1,514 mm	0

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

24.5 °C

+0.8 °C

Hot days (≥ 30 °C)

2 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1579 mm

-98 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	18.3 °C	-0.4 °C	81 mm	-20 mm
Feb	17.8 °C	-1.0 °C	109 mm	+7 mm
Mar	20.4 °C	+0.3 °C	124 mm	+9 mm
Apr	21.6 °C	-0.4 °C	164 mm	+29 mm
May	24.7 °C	+0.3 °C	266 mm	+64 mm
Jun	28.1 °C	+1.5 °C	91 mm	-108 mm
Jul	28.9 °C	+0.6 °C	256 mm	+126 mm
Aug	29.2 °C	+0.8 °C	90 mm	-95 mm
Sep	29.3 °C	+1.6 °C	48 mm	-104 mm
Oct	28.4 °C	+2.6 °C	77 mm	-54 mm
Nov	24.7 °C	+1.3 °C	166 mm	+47 mm
Dec	21.7 °C	+1.3 °C	108 mm	+2 mm

The year's extremes

Hottest day

30.1 °C

26 Sep 2025

Coldest day

12.2 °C

8 Feb 2025

Wettest day

79.4 mm

10 May 2025

Windiest day

59.2 km/h

24 Jul 2025

Strongest gust

90.0 km/h

14 Nov 2025

Hottest feels-like

37.7 °C

25 Jun 2025

Coldest feels-like

4.8 °C

8 Feb 2025

Sunniest day

13.0 h

2 May 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 Nanjō?

Nanjō has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 22.9 °C and it receives 1,677 mm of precipitation per year.

What is the hottest day ever recorded in Nanjō?

The hottest day measured in Nanjō between 1940 and 2025 was 20 July 2024, reaching 30.7 °C.

What is the coldest day in Nanjō?

The coldest day measured in Nanjō between 1940 and 2025 was 25 January 2016, at 10.1 °C.

Does it snow in Nanjō?

Almost never: Nanjō sees virtually no snow, with about 0 frost days per year.

Has the climate of Nanjō warmed?

Yes: Nanjō warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Nanjō?

The wettest day measured in Nanjō between 1940 and 2025 was 11 October 2014, with 235 mm of rain in 24 hours.

What was the windiest day in Nanjō?

The windiest day measured in Nanjō between 1940 and 2025 was 3 October 1961, with winds reaching 121.7 km/h.

What is the warmest month in Nanjō?

The warmest month in Nanjō is July (27.8 °C on average); the coldest is January (17.6 °C).

How much does it rain in Nanjō?

Nanjō receives on average 1,677 mm of precipitation per year, spread over about 163 rainy days.

Is it sunny in Nanjō?

Nanjō gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.

Are there tropical nights in Nanjō?

Yes: Nanjō has on average 249 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Nanjō?

In Nanjō, between 1940 and 2025, the highest apparent temperature reached 38.8 °C on 11 August 2024, and the lowest was 0.6 °C on 24 January 2016.

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