Nanjin climate — normals and trends

Q: What is the climate of Nanjin?

Nanjin has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 18.4 °C and it receives 1,256 mm of precipitation per year.

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

The hottest day measured in Nanjin between 1940 and 2025 was 17 August 2011, reaching 44.1 °C.

Q: What is the coldest day in Nanjin?

The coldest day measured in Nanjin between 1940 and 2025 was 11 January 1956, at -5.2 °C.

Q: Does it snow in Nanjin?

Yes. Nanjin gets on average 1.7 cm of snow per year and has around 1 frost days.

Q: Has the climate of Nanjin warmed?

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

Q: What is the wettest day in Nanjin?

The wettest day measured in Nanjin between 1940 and 2025 was 9 June 2013, with 124 mm of rain in 24 hours.

Q: What was the windiest day in Nanjin?

The windiest day measured in Nanjin between 1940 and 2025 was 24 May 1946, with winds reaching 65.0 km/h.

Q: What is the warmest month in Nanjin?

The warmest month in Nanjin is August (28.5 °C on average); the coldest is January (7.9 °C).

Q: How much does it rain in Nanjin?

Nanjin receives on average 1,256 mm of precipitation per year, spread over about 158 rainy days.

Q: Is it sunny in Nanjin?

Nanjin gets on average 6.1 hours of sunshine per day, roughly 2,227 hours per year over 1940-2025.

Nanjin (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 18.4 °C and it receives 1,256 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 (28.5 °C on average) and the coldest is January (7.9 °C). Rainfall peaks in July.

Nanjin averages 1 frost days, 75 hot days (≥ 30 °C) and 158 rainy days per year.

Nanjin has warmed by +1.0 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.

The number of frost days there went from about 2 to 0 per year over the period.

The hottest day of the period reached 44.1 °C (on 17 August 2011) and the coldest -5.2 °C (on 11 January 1956).

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

NanjinChongqing Municipality

coords: 29.98°, 106.27°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJulyDriest monthJanuary

Mean daily temperature

18.4°C

Average daily high

21.8°C

Average daily low

15.5°C

Annual rainfall

1,256mm

Sunshine / day

6.1h

Mean relative humidity

78%

Average peak wind

10.2km/h

Seasonal range

20.6°C

Frost days (< 0 °C)

1 d/yr

Hot days (≥ 30 °C)

75 d/yr

Rainy days (≥ 1 mm)

158 d/yr

Annual snowfall

1.7 cm

Average feels-like high

23.1 °C

Average feels-like low

16.2 °C

Average peak gust

22.1 km/h

Tropical nights (≥ 20 °C)

121 d/yr

Solar radiation

11.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.0 °C

since 1940

+0.1 °C per decade · r² = 0.26 · 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

44.1 °C

17 August 2011

Coldest day

-5.2 °C

11 January 1956

Wettest day

124 mm

9 June 2013

Windiest day

65.0 km/h

24 May 1946

Strongest gust

83.5 km/h

22 May 1946

Hottest feels-like

48.2 °C

25 July 1957

Coldest feels-like

-8.8 °C

11 January 1956

Snowiest day

5.3 cm

29 January 1977

Sunniest day

13.9 h

27 June 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	42.6 °C5 August 2025	1.0 °C12 January 2025	20.0 °C	1,349 mm	112	0
2024	43.2 °C4 September 2024	0.5 °C16 December 2024	20.3 °C	1,030 mm	104	0
2023	38.0 °C9 August 2023	0.7 °C19 January 2023	19.3 °C	1,404 mm	87	0
2022	43.5 °C20 August 2022	1.4 °C23 February 2022	19.9 °C	978 mm	101	0
2021	40.6 °C3 August 2021	-1.7 °C12 January 2021	18.8 °C	1,222 mm	80	3
2020	39.2 °C29 August 2020	1.5 °C20 December 2020	18.7 °C	1,257 mm	78	0
2019	39.1 °C25 August 2019	3.2 °C22 January 2019	18.7 °C	1,112 mm	74	0
2018	39.5 °C20 July 2018	1.0 °C9 January 2018	18.8 °C	1,180 mm	87	0
2017	42.6 °C28 July 2017	2.3 °C21 December 2017	19.0 °C	1,022 mm	74	0
2016	40.6 °C25 August 2016	-2.3 °C25 January 2016	19.1 °C	1,059 mm	90	2
2015	37.2 °C2 August 2015	1.4 °C17 December 2015	19.3 °C	1,024 mm	76	0
2014	41.9 °C6 August 2014	1.2 °C13 February 2014	18.5 °C	1,326 mm	54	0
2013	42.2 °C31 July 2013	0.4 °C1 January 2013	19.8 °C	1,129 mm	108	0
2012	38.1 °C11 August 2012	-0.6 °C31 December 2012	18.1 °C	1,024 mm	67	1
2011	44.1 °C17 August 2011	-0.7 °C12 January 2011	19.0 °C	890 mm	100	3
2010	41.8 °C11 August 2010	-0.4 °C16 December 2010	18.6 °C	973 mm	70	1
2009	38.7 °C19 July 2009	1.4 °C27 January 2009	18.8 °C	1,097 mm	80	0
2008	37.0 °C27 July 2008	-0.9 °C29 January 2008	18.4 °C	1,130 mm	74	2
2007	36.5 °C22 August 2007	1.2 °C19 January 2007	19.0 °C	1,247 mm	86	0
2006	42.9 °C15 August 2006	1.6 °C9 January 2006	19.7 °C	902 mm	93	0
2005	36.9 °C1 July 2005	0.0 °C2 January 2005	18.5 °C	1,243 mm	81	0
2004	38.3 °C11 August 2004	-0.4 °C31 December 2004	18.4 °C	1,547 mm	71	1
2003	38.2 °C25 August 2003	1.2 °C6 January 2003	18.8 °C	1,100 mm	68	0
2002	37.7 °C13 July 2002	2.0 °C28 December 2002	18.9 °C	1,315 mm	76	0
2001	40.4 °C6 August 2001	0.1 °C22 December 2001	19.0 °C	1,114 mm	66	0
2000	37.7 °C27 July 2000	1.1 °C1 January 2000	18.4 °C	1,402 mm	71	0
1999	36.2 °C10 September 1999	-0.1 °C26 December 1999	18.7 °C	1,632 mm	66	2
1998	36.3 °C19 July 1998	1.3 °C20 January 1998	19.3 °C	1,578 mm	81	0
1997	42.0 °C31 August 1997	1.0 °C24 January 1997	18.7 °C	1,071 mm	80	0
1996	37.5 °C23 August 1996	0.2 °C22 February 1996	17.9 °C	1,362 mm	77	0
1995	41.8 °C6 September 1995	2.0 °C5 January 1995	18.5 °C	1,210 mm	82	0
1994	41.5 °C5 August 1994	0.7 °C21 January 1994	18.8 °C	1,223 mm	89	0
1993	36.3 °C13 July 1993	-0.6 °C27 January 1993	17.9 °C	1,277 mm	57	3
1992	42.1 °C10 August 1992	0.6 °C16 January 1992	18.1 °C	1,096 mm	73	0
1991	37.6 °C25 July 1991	-3.1 °C28 December 1991	18.2 °C	1,089 mm	73	2
1990	38.5 °C27 August 1990	0.9 °C1 February 1990	18.7 °C	1,105 mm	91	0
1989	37.5 °C22 July 1989	0.7 °C16 January 1989	17.7 °C	1,273 mm	62	0
1988	37.1 °C2 May 1988	2.4 °C11 February 1988	18.1 °C	1,299 mm	73	0
1987	35.3 °C23 May 1987	1.2 °C5 December 1987	18.4 °C	1,353 mm	57	0
1986	37.4 °C11 August 1986	0.2 °C2 March 1986	17.7 °C	1,320 mm	67	0
1985	37.4 °C5 August 1985	1.2 °C18 January 1985	17.9 °C	1,342 mm	70	0
1984	37.2 °C1 August 1984	0.7 °C18 December 1984	17.8 °C	1,405 mm	65	0
1983	36.5 °C27 July 1983	1.6 °C24 January 1983	18.1 °C	1,326 mm	50	0
1982	37.0 °C3 August 1982	-3.2 °C27 December 1982	17.6 °C	1,436 mm	56	3
1981	37.3 °C19 August 1981	0.4 °C23 December 1981	18.2 °C	963 mm	75	0
1980	37.9 °C27 July 1980	-0.8 °C9 February 1980	18.3 °C	1,179 mm	55	4
1979	36.5 °C9 August 1979	-0.4 °C24 November 1979	18.4 °C	1,418 mm	66	1
1978	41.0 °C4 September 1978	0.2 °C18 January 1978	18.8 °C	965 mm	89	0
1977	37.6 °C8 August 1977	-2.0 °C30 January 1977	18.3 °C	1,046 mm	72	4
1976	40.3 °C7 August 1976	0.2 °C29 December 1976	17.9 °C	1,109 mm	63	0
1975	40.0 °C9 September 1975	-2.6 °C15 December 1975	18.6 °C	1,203 mm	76	6
1974	37.9 °C30 July 1974	1.1 °C18 January 1974	18.1 °C	1,402 mm	55	0
1973	37.5 °C25 August 1973	1.0 °C31 December 1973	19.0 °C	1,359 mm	78	0
1972	41.2 °C26 August 1972	0.6 °C8 February 1972	18.4 °C	1,253 mm	83	0
1971	41.1 °C2 September 1971	1.2 °C31 January 1971	18.6 °C	1,006 mm	75	0
1970	38.5 °C18 August 1970	-0.3 °C7 January 1970	18.1 °C	1,296 mm	75	2
1969	37.9 °C2 August 1969	-0.3 °C4 February 1969	18.7 °C	1,090 mm	86	1
1968	37.0 °C31 July 1968	0.3 °C14 February 1968	17.7 °C	1,609 mm	56	0
1967	38.0 °C30 August 1967	-1.7 °C12 January 1967	18.0 °C	1,515 mm	76	4
1966	34.9 °C3 August 1966	-0.8 °C29 January 1966	18.0 °C	1,182 mm	65	1
1965	33.4 °C29 July 1965	-0.8 °C20 December 1965	17.6 °C	1,472 mm	44	1
1964	39.9 °C20 July 1964	0.5 °C26 February 1964	18.5 °C	1,480 mm	72	0
1963	37.4 °C26 July 1963	-2.2 °C15 January 1963	19.0 °C	1,264 mm	84	2
1962	37.6 °C18 July 1962	-0.1 °C3 January 1962	18.4 °C	1,350 mm	80	1
1961	38.0 °C21 July 1961	0.6 °C17 January 1961	18.9 °C	1,359 mm	97	0
1960	37.2 °C6 August 1960	-0.3 °C3 January 1960	18.6 °C	1,419 mm	79	1
1959	42.2 °C28 August 1959	-0.5 °C13 January 1959	19.2 °C	944 mm	95	1
1958	37.2 °C26 July 1958	0.7 °C15 January 1958	18.7 °C	1,153 mm	81	0
1957	38.8 °C31 August 1957	0.9 °C7 February 1957	18.4 °C	1,245 mm	57	0
1956	33.9 °C3 July 1956	-5.2 °C11 January 1956	18.0 °C	1,432 mm	69	7
1955	33.7 °C8 August 1955	-3.7 °C6 January 1955	18.0 °C	1,224 mm	64	4
1954	34.2 °C1 September 1954	-0.5 °C23 January 1954	18.1 °C	1,734 mm	67	2
1953	36.3 °C18 August 1953	1.6 °C19 January 1953	18.9 °C	1,530 mm	79	0
1952	35.7 °C4 July 1952	-0.7 °C7 January 1952	18.5 °C	1,634 mm	67	2
1951	34.5 °C8 September 1951	-3.5 °C14 January 1951	18.2 °C	1,264 mm	78	2
1950	33.6 °C23 July 1950	-0.2 °C17 December 1950	17.8 °C	1,655 mm	43	1
1949	34.6 °C15 September 1949	-2.8 °C12 January 1949	18.3 °C	1,334 mm	80	4
1948	34.1 °C28 July 1948	-2.8 °C28 January 1948	18.3 °C	1,326 mm	80	5
1947	33.3 °C18 August 1947	-3.4 °C20 December 1947	18.5 °C	1,353 mm	78	5
1946	39.3 °C20 July 1946	0.2 °C3 February 1946	19.1 °C	827 mm	102	0
1945	33.6 °C21 July 1945	-4.4 °C11 February 1945	17.3 °C	1,292 mm	57	12
1944	35.3 °C20 August 1944	-3.0 °C21 December 1944	17.8 °C	1,049 mm	87	9
1943	32.3 °C1 July 1943	-1.5 °C8 February 1943	18.0 °C	1,842 mm	44	1
1942	32.5 °C8 August 1942	-0.2 °C15 February 1942	18.5 °C	1,327 mm	64	1
1941	34.6 °C11 July 1941	1.0 °C24 January 1941	18.2 °C	1,325 mm	56	0
1940	35.0 °C19 August 1940	-2.2 °C23 January 1940	18.0 °C	1,092 mm	78	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

23.6 °C

+1.8 °C

Hot days (≥ 30 °C)

112 d/yr

+37

Frost days (< 0 °C)

0 d/yr

-1

Annual rainfall

1349 mm

+93 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	12.3 °C	+1.7 °C	53 mm	+23 mm
Feb	12.6 °C	-0.1 °C	31 mm	-2 mm
Mar	17.4 °C	-0.3 °C	69 mm	+3 mm
Apr	26.0 °C	+3.2 °C	91 mm	-18 mm
May	28.8 °C	+2.6 °C	72 mm	-79 mm
Jun	31.3 °C	+2.6 °C	143 mm	-17 mm
Jul	35.4 °C	+3.3 °C	225 mm	+30 mm
Aug	35.7 °C	+3.2 °C	205 mm	+38 mm
Sep	28.8 °C	+1.3 °C	240 mm	+100 mm
Oct	23.7 °C	+2.1 °C	152 mm	+51 mm
Nov	16.9 °C	+0.1 °C	40 mm	-25 mm
Dec	13.5 °C	+1.7 °C	28 mm	-10 mm

The year's extremes

Hottest day

42.6 °C

5 Aug 2025

Coldest day

1.0 °C

12 Jan 2025

Wettest day

74.8 mm

23 Jul 2025

Windiest day

34.0 km/h

27 Mar 2025

Strongest gust

66.2 km/h

12 Apr 2025

Hottest feels-like

47.9 °C

16 Jul 2025

Coldest feels-like

-2.3 °C

27 Jan 2025

Sunniest day

13.9 h

27 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 Nanjin?

Nanjin has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 18.4 °C and it receives 1,256 mm of precipitation per year.

What is the hottest day ever recorded in Nanjin?

The hottest day measured in Nanjin between 1940 and 2025 was 17 August 2011, reaching 44.1 °C.

What is the coldest day in Nanjin?

The coldest day measured in Nanjin between 1940 and 2025 was 11 January 1956, at -5.2 °C.

Does it snow in Nanjin?

Yes. Nanjin gets on average 1.7 cm of snow per year and has around 1 frost days.

Has the climate of Nanjin warmed?

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

What is the wettest day in Nanjin?

The wettest day measured in Nanjin between 1940 and 2025 was 9 June 2013, with 124 mm of rain in 24 hours.

What was the windiest day in Nanjin?

The windiest day measured in Nanjin between 1940 and 2025 was 24 May 1946, with winds reaching 65.0 km/h.

What is the warmest month in Nanjin?

The warmest month in Nanjin is August (28.5 °C on average); the coldest is January (7.9 °C).

How much does it rain in Nanjin?

Nanjin receives on average 1,256 mm of precipitation per year, spread over about 158 rainy days.

Is it sunny in Nanjin?

Nanjin gets on average 6.1 hours of sunshine per day, roughly 2,227 hours per year over 1940-2025.

What is the biggest single-day snowfall in Nanjin?

The heaviest 24-hour snowfall measured in Nanjin between 1940 and 2025 was 29 January 1977, with 5.3 cm.

Are there tropical nights in Nanjin?

Yes: Nanjin has on average 121 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Nanjin?

In Nanjin, between 1940 and 2025, the highest apparent temperature reached 48.2 °C on 25 July 1957, and the lowest was -8.8 °C on 11 January 1956.

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