Nantong climate — normals and trends

Q: What is the climate of Nantong?

Nantong has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.9 °C and it receives 1,284 mm of precipitation per year.

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

The hottest day measured in Nantong between 1940 and 2025 was 24 July 2017, reaching 41.3 °C.

Q: What is the coldest day in Nantong?

The coldest day measured in Nantong between 1940 and 2025 was 17 January 1945, at -13.2 °C.

Q: Does it snow in Nantong?

Yes. Nantong gets on average 8.2 cm of snow per year and has around 40 frost days.

Q: Has the climate of Nantong warmed?

Yes: Nantong warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Nantong?

The wettest day measured in Nantong between 1940 and 2025 was 26 July 1949, with 201 mm of rain in 24 hours.

Q: What was the windiest day in Nantong?

The windiest day measured in Nantong between 1940 and 2025 was 22 August 1951, with winds reaching 55.7 km/h.

Q: What is the warmest month in Nantong?

The warmest month in Nantong is July (28.1 °C on average); the coldest is January (3.2 °C).

Q: How much does it rain in Nantong?

Nantong receives on average 1,284 mm of precipitation per year, spread over about 120 rainy days.

Q: Is it sunny in Nantong?

Nantong gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.

Nantong (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.9 °C and it receives 1,284 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 (28.1 °C on average) and the coldest is January (3.2 °C). Rainfall peaks in June.

Nantong averages 40 frost days, 59 hot days (≥ 30 °C) and 120 rainy days per year.

Nantong has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.

The number of frost days there went from about 51 to 29 per year over the period.

The hottest day of the period reached 41.3 °C (on 24 July 2017) and the coldest -13.2 °C (on 17 January 1945).

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

NantongJiangsu

coords: 32.03°, 120.87°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthJuneDriest monthDecember

Mean daily temperature

15.9°C

Average daily high

19.9°C

Average daily low

12.4°C

Annual rainfall

1,284mm

Sunshine / day

7.8h

Mean relative humidity

77%

Average peak wind

16.4km/h

Seasonal range

24.9°C

Frost days (< 0 °C)

40 d/yr

Hot days (≥ 30 °C)

59 d/yr

Rainy days (≥ 1 mm)

120 d/yr

Annual snowfall

8.2 cm

Average feels-like high

20.0 °C

Average feels-like low

11.8 °C

Average peak gust

32.8 km/h

Tropical nights (≥ 20 °C)

100 d/yr

Solar radiation

14.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.6 °C

since 1940

+0.2 °C per decade · r² = 0.36 · 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

41.3 °C

24 July 2017

Coldest day

-13.2 °C

17 January 1945

Wettest day

201 mm

26 July 1949

Windiest day

55.7 km/h

22 August 1951

Strongest gust

110.9 km/h

22 August 1951

Hottest feels-like

48.0 °C

2 August 2003

Coldest feels-like

-18.0 °C

16 January 1958

Snowiest day

21.2 cm

18 January 1984

Sunniest day

14.0 h

19 June 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	37.5 °C6 July 2025	-7.2 °C9 February 2025	18.0 °C	1,176 mm	103	30
2024	38.8 °C10 August 2024	-6.1 °C23 January 2024	17.5 °C	1,300 mm	86	30
2023	37.1 °C12 July 2023	-7.5 °C25 January 2023	17.1 °C	1,538 mm	83	31
2022	39.6 °C15 August 2022	-4.3 °C18 December 2022	17.2 °C	1,062 mm	85	34
2021	37.2 °C14 July 2021	-8.3 °C8 January 2021	17.4 °C	1,141 mm	87	26
2020	36.4 °C20 August 2020	-7.4 °C31 December 2020	17.0 °C	1,570 mm	58	15
2019	36.2 °C30 July 2019	-3.0 °C17 January 2019	16.9 °C	883 mm	59	20
2018	37.8 °C26 June 2018	-6.9 °C13 January 2018	17.1 °C	1,119 mm	84	37
2017	41.3 °C24 July 2017	-4.4 °C21 January 2017	17.2 °C	972 mm	72	25
2016	37.8 °C27 July 2016	-9.5 °C24 January 2016	16.9 °C	1,832 mm	66	32
2015	36.9 °C3 August 2015	-4.2 °C10 February 2015	16.4 °C	1,619 mm	40	21
2014	35.8 °C4 August 2014	-4.8 °C22 January 2014	16.4 °C	1,153 mm	37	33
2013	39.1 °C6 August 2013	-4.1 °C28 December 2013	16.9 °C	862 mm	82	44
2012	36.9 °C5 July 2012	-5.3 °C24 December 2012	16.1 °C	1,059 mm	61	40
2011	37.0 °C9 June 2011	-6.3 °C16 January 2011	16.2 °C	925 mm	69	52
2010	38.1 °C12 August 2010	-6.6 °C14 January 2010	16.5 °C	976 mm	76	36
2009	36.2 °C17 July 2009	-7.3 °C24 January 2009	16.7 °C	1,271 mm	66	32
2008	37.8 °C6 July 2008	-6.5 °C22 December 2008	16.4 °C	1,181 mm	65	46
2007	36.7 °C28 July 2007	-3.1 °C29 January 2007	17.3 °C	1,092 mm	72	18
2006	37.3 °C21 June 2006	-4.5 °C7 January 2006	17.1 °C	1,045 mm	83	22
2005	39.3 °C3 July 2005	-6.1 °C2 January 2005	16.5 °C	934 mm	80	55
2004	36.9 °C24 July 2004	-6.0 °C22 January 2004	16.8 °C	1,196 mm	68	25
2003	38.0 °C2 August 2003	-6.2 °C5 January 2003	16.2 °C	1,115 mm	56	38
2002	37.5 °C15 July 2002	-4.6 °C28 December 2002	16.7 °C	1,577 mm	56	25
2001	36.8 °C22 July 2001	-5.0 °C15 January 2001	16.4 °C	1,312 mm	47	31
2000	35.7 °C21 July 2000	-5.8 °C26 January 2000	16.4 °C	1,243 mm	70	27
1999	34.7 °C10 September 1999	-6.4 °C22 December 1999	16.0 °C	1,743 mm	33	28
1998	37.0 °C10 August 1998	-6.5 °C19 January 1998	16.9 °C	1,547 mm	60	21
1997	36.6 °C5 June 1997	-4.6 °C25 January 1997	16.3 °C	1,029 mm	65	32
1996	34.9 °C15 June 1996	-4.9 °C10 February 1996	15.6 °C	1,445 mm	53	44
1995	36.5 °C7 September 1995	-4.7 °C5 February 1995	15.7 °C	1,047 mm	62	35
1994	36.2 °C2 July 1994	-3.7 °C21 January 1994	16.8 °C	923 mm	75	22
1993	35.5 °C12 July 1993	-7.0 °C17 January 1993	15.2 °C	1,749 mm	36	43
1992	36.9 °C30 July 1992	-4.2 °C15 January 1992	15.5 °C	1,084 mm	44	35
1991	34.8 °C22 July 1991	-9.1 °C30 December 1991	15.3 °C	1,750 mm	45	27
1990	36.6 °C24 July 1990	-7.8 °C1 February 1990	16.3 °C	1,482 mm	72	33
1989	35.9 °C12 August 1989	-4.0 °C15 January 1989	15.5 °C	1,480 mm	29	22
1988	37.3 °C8 July 1988	-5.2 °C24 January 1988	15.3 °C	1,002 mm	49	40
1987	34.6 °C3 August 1987	-7.1 °C14 January 1987	15.3 °C	1,639 mm	45	43
1986	35.6 °C12 August 1986	-8.3 °C5 January 1986	15.1 °C	1,186 mm	54	44
1985	35.9 °C16 July 1985	-6.0 °C31 January 1985	15.3 °C	1,518 mm	59	43
1984	35.6 °C26 July 1984	-7.7 °C22 January 1984	15.0 °C	1,187 mm	53	56
1983	37.4 °C3 August 1983	-7.1 °C19 February 1983	15.4 °C	1,482 mm	43	43
1982	34.0 °C8 July 1982	-7.0 °C19 January 1982	15.5 °C	1,207 mm	41	39
1981	34.8 °C19 June 1981	-6.8 °C3 January 1981	15.1 °C	1,366 mm	53	54
1980	35.5 °C27 July 1980	-9.2 °C10 February 1980	14.4 °C	1,427 mm	30	55
1979	36.0 °C6 August 1979	-9.0 °C19 November 1979	15.7 °C	990 mm	50	36
1978	38.0 °C8 July 1978	-4.9 °C2 February 1978	15.8 °C	800 mm	78	52
1977	36.6 °C6 August 1977	-10.1 °C30 January 1977	15.3 °C	1,683 mm	38	49
1976	35.5 °C5 August 1976	-7.1 °C29 December 1976	14.7 °C	1,245 mm	42	49
1975	35.2 °C19 July 1975	-4.5 °C18 December 1975	15.6 °C	1,495 mm	59	50
1974	34.6 °C5 August 1974	-5.1 °C25 February 1974	15.2 °C	1,255 mm	41	41
1973	34.6 °C4 August 1973	-9.2 °C26 December 1973	15.5 °C	1,215 mm	55	34
1972	35.0 °C7 July 1972	-5.9 °C16 January 1972	14.8 °C	1,293 mm	41	49
1971	36.1 °C15 July 1971	-6.2 °C5 February 1971	15.3 °C	1,069 mm	66	55
1970	34.9 °C7 August 1970	-9.2 °C5 January 1970	15.0 °C	1,479 mm	42	48
1969	35.4 °C17 August 1969	-13.2 °C6 February 1969	14.8 °C	1,153 mm	50	66
1968	33.4 °C16 July 1968	-7.2 °C16 January 1968	15.2 °C	1,052 mm	45	61
1967	36.9 °C23 August 1967	-9.4 °C16 January 1967	15.2 °C	1,035 mm	73	78
1966	38.5 °C7 August 1966	-7.7 °C27 December 1966	16.0 °C	1,223 mm	59	32
1965	34.6 °C20 July 1965	-7.0 °C17 December 1965	15.2 °C	1,163 mm	47	46
1964	37.6 °C16 July 1964	-4.7 °C2 February 1964	15.9 °C	1,240 mm	72	41
1963	35.4 °C28 July 1963	-8.3 °C4 February 1963	15.2 °C	1,427 mm	57	60
1962	36.5 °C19 July 1962	-5.3 °C2 January 1962	15.4 °C	1,501 mm	48	46
1961	35.3 °C23 July 1961	-5.0 °C12 January 1961	16.3 °C	1,285 mm	72	34
1960	36.4 °C14 July 1960	-6.3 °C30 December 1960	15.8 °C	1,574 mm	53	38
1959	37.8 °C22 August 1959	-8.4 °C5 January 1959	15.8 °C	1,129 mm	63	35
1958	35.3 °C22 July 1958	-11.0 °C16 January 1958	15.2 °C	1,146 mm	61	44
1957	35.8 °C18 July 1957	-11.9 °C12 February 1957	14.8 °C	1,834 mm	39	48
1956	37.0 °C12 July 1956	-7.7 °C24 January 1956	15.2 °C	1,657 mm	67	61
1955	35.9 °C12 September 1955	-10.1 °C16 January 1955	15.9 °C	1,106 mm	71	38
1954	36.3 °C12 August 1954	-9.0 °C26 January 1954	15.6 °C	1,835 mm	53	45
1953	37.0 °C26 August 1953	-8.4 °C18 January 1953	16.3 °C	1,302 mm	67	32
1952	34.3 °C2 August 1952	-6.7 °C19 February 1952	15.7 °C	1,880 mm	52	36
1951	36.6 °C8 August 1951	-8.4 °C13 January 1951	15.5 °C	1,698 mm	49	41
1950	35.2 °C13 July 1950	-5.4 °C5 February 1950	15.9 °C	1,529 mm	47	38
1949	34.1 °C20 July 1949	-6.2 °C9 January 1949	16.1 °C	1,784 mm	43	33
1948	33.4 °C2 September 1948	-8.3 °C26 January 1948	16.4 °C	1,246 mm	59	35
1947	34.5 °C29 July 1947	-6.4 °C19 December 1947	15.7 °C	1,148 mm	61	40
1946	40.5 °C5 August 1946	-5.7 °C29 December 1946	17.0 °C	769 mm	111	52
1945	35.1 °C9 June 1945	-13.2 °C17 January 1945	15.5 °C	1,018 mm	71	66
1944	35.5 °C13 July 1944	-6.3 °C20 December 1944	15.9 °C	865 mm	76	66
1943	33.8 °C2 August 1943	-7.4 °C12 January 1943	15.3 °C	1,623 mm	17	52
1942	35.6 °C7 August 1942	-5.9 °C17 January 1942	15.6 °C	1,159 mm	58	55
1941	34.2 °C12 June 1941	-6.6 °C24 January 1941	15.9 °C	1,067 mm	47	38
1940	33.9 °C14 August 1940	-7.1 °C26 January 1940	15.7 °C	1,045 mm	62	48

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

22.4 °C

+2.5 °C

Hot days (≥ 30 °C)

103 d/yr

+44

Frost days (< 0 °C)

30 d/yr

-10

Annual rainfall

1176 mm

-108 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	10.4 °C	+3.3 °C	9 mm	-34 mm
Feb	9.5 °C	+0.8 °C	11 mm	-44 mm
Mar	16.7 °C	+3.4 °C	47 mm	-36 mm
Apr	24.6 °C	+5.2 °C	34 mm	-67 mm
May	26.5 °C	+2.1 °C	134 mm	+7 mm
Jun	28.9 °C	+1.2 °C	262 mm	+27 mm
Jul	33.2 °C	+1.7 °C	217 mm	-5 mm
Aug	33.8 °C	+2.6 °C	173 mm	+21 mm
Sep	30.1 °C	+3.2 °C	229 mm	+101 mm
Oct	24.1 °C	+2.1 °C	47 mm	-10 mm
Nov	17.6 °C	+1.4 °C	9 mm	-41 mm
Dec	12.8 °C	+2.9 °C	5 mm	-29 mm

The year's extremes

Hottest day

37.5 °C

6 Jul 2025

Coldest day

-7.2 °C

9 Feb 2025

Wettest day

124.1 mm

30 Jul 2025

Windiest day

44.9 km/h

30 Jul 2025

Strongest gust

79.2 km/h

30 Jul 2025

Hottest feels-like

45.1 °C

6 Jul 2025

Coldest feels-like

-12.1 °C

8 Feb 2025

Sunniest day

14.0 h

17 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 Nantong?

Nantong has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.9 °C and it receives 1,284 mm of precipitation per year.

What is the hottest day ever recorded in Nantong?

The hottest day measured in Nantong between 1940 and 2025 was 24 July 2017, reaching 41.3 °C.

What is the coldest day in Nantong?

The coldest day measured in Nantong between 1940 and 2025 was 17 January 1945, at -13.2 °C.

Does it snow in Nantong?

Yes. Nantong gets on average 8.2 cm of snow per year and has around 40 frost days.

Has the climate of Nantong warmed?

Yes: Nantong warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Nantong?

The wettest day measured in Nantong between 1940 and 2025 was 26 July 1949, with 201 mm of rain in 24 hours.

What was the windiest day in Nantong?

The windiest day measured in Nantong between 1940 and 2025 was 22 August 1951, with winds reaching 55.7 km/h.

What is the warmest month in Nantong?

The warmest month in Nantong is July (28.1 °C on average); the coldest is January (3.2 °C).

How much does it rain in Nantong?

Nantong receives on average 1,284 mm of precipitation per year, spread over about 120 rainy days.

Is it sunny in Nantong?

Nantong gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.

What is the biggest single-day snowfall in Nantong?

The heaviest 24-hour snowfall measured in Nantong between 1940 and 2025 was 18 January 1984, with 21.2 cm.

Are there tropical nights in Nantong?

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

What was the most extreme apparent temperature in Nantong?

In Nantong, between 1940 and 2025, the highest apparent temperature reached 48.0 °C on 2 August 2003, and the lowest was -18.0 °C on 16 January 1958.

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