Zhangjiagang climate — normals and trends

Q: What is the climate of Zhangjiagang?

Zhangjiagang has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.1 °C and it receives 1,278 mm of precipitation per year.

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

The hottest day measured in Zhangjiagang between 1940 and 2025 was 24 July 2017, reaching 41.4 °C.

Q: What is the coldest day in Zhangjiagang?

The coldest day measured in Zhangjiagang between 1940 and 2025 was 17 January 1945, at -14.3 °C.

Q: Does it snow in Zhangjiagang?

Yes. Zhangjiagang gets on average 9.4 cm of snow per year and has around 38 frost days.

Q: Has the climate of Zhangjiagang warmed?

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

Q: What is the wettest day in Zhangjiagang?

The wettest day measured in Zhangjiagang between 1940 and 2025 was 26 July 1949, with 217 mm of rain in 24 hours.

Q: What was the windiest day in Zhangjiagang?

The windiest day measured in Zhangjiagang between 1940 and 2025 was 22 August 1951, with winds reaching 52.4 km/h.

Q: What is the warmest month in Zhangjiagang?

The warmest month in Zhangjiagang is July (28.4 °C on average); the coldest is January (3.4 °C).

Q: How much does it rain in Zhangjiagang?

Zhangjiagang receives on average 1,278 mm of precipitation per year, spread over about 121 rainy days.

Q: Is it sunny in Zhangjiagang?

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

Zhangjiagang (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.1 °C and it receives 1,278 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 (28.4 °C on average) and the coldest is January (3.4 °C). Rainfall peaks in June.

Zhangjiagang averages 38 frost days, 62 hot days (≥ 30 °C) and 121 rainy days per year.

Zhangjiagang has warmed by +1.6 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.

The number of frost days there went from about 49 to 27 per year over the period.

The hottest day of the period reached 41.4 °C (on 24 July 2017) and the coldest -14.3 °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

ZhangjiagangJiangsu

coords: 31.86°, 120.54°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthJuneDriest monthDecember

Mean daily temperature

16.1°C

Average daily high

20.0°C

Average daily low

12.7°C

Annual rainfall

1,278mm

Sunshine / day

7.8h

Mean relative humidity

77%

Average peak wind

16.5km/h

Seasonal range

25.0°C

Frost days (< 0 °C)

38 d/yr

Hot days (≥ 30 °C)

62 d/yr

Rainy days (≥ 1 mm)

121 d/yr

Annual snowfall

9.4 cm

Average feels-like high

20.2 °C

Average feels-like low

12.1 °C

Average peak gust

32.8 km/h

Tropical nights (≥ 20 °C)

104 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

41.4 °C

24 July 2017

Coldest day

-14.3 °C

17 January 1945

Wettest day

217 mm

26 July 1949

Windiest day

52.4 km/h

22 August 1951

Strongest gust

104.0 km/h

2 August 1956

Hottest feels-like

48.0 °C

26 July 2016

Coldest feels-like

-19.3 °C

17 January 1945

Snowiest day

24.4 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	37.0 °C6 July 2025	-6.9 °C9 February 2025	18.3 °C	1,166 mm	109	27
2024	39.1 °C4 August 2024	-6.0 °C23 January 2024	17.7 °C	1,342 mm	93	29
2023	37.0 °C12 July 2023	-7.9 °C25 January 2023	17.4 °C	1,440 mm	83	29
2022	40.0 °C14 August 2022	-4.2 °C19 December 2022	17.6 °C	1,031 mm	86	31
2021	37.2 °C14 July 2021	-8.0 °C8 January 2021	17.7 °C	1,231 mm	88	23
2020	36.9 °C20 August 2020	-7.1 °C31 December 2020	17.3 °C	1,669 mm	61	16
2019	36.4 °C30 July 2019	-2.6 °C17 January 2019	17.2 °C	909 mm	61	17
2018	37.4 °C26 June 2018	-7.7 °C30 January 2018	17.4 °C	1,090 mm	87	38
2017	41.4 °C24 July 2017	-4.9 °C21 January 2017	17.4 °C	920 mm	75	19
2016	38.0 °C27 July 2016	-8.8 °C24 January 2016	17.2 °C	1,794 mm	73	29
2015	36.8 °C3 August 2015	-4.5 °C18 December 2015	16.7 °C	1,661 mm	44	18
2014	35.8 °C4 August 2014	-4.7 °C22 January 2014	16.7 °C	1,202 mm	41	28
2013	39.1 °C6 August 2013	-4.2 °C28 December 2013	17.2 °C	917 mm	86	37
2012	36.7 °C5 July 2012	-4.9 °C24 December 2012	16.3 °C	1,112 mm	64	36
2011	36.4 °C25 July 2011	-6.9 °C16 January 2011	16.5 °C	936 mm	69	53
2010	38.3 °C14 August 2010	-6.0 °C14 January 2010	16.7 °C	981 mm	76	35
2009	36.5 °C17 July 2009	-7.1 °C24 January 2009	16.9 °C	1,254 mm	73	31
2008	37.4 °C6 July 2008	-6.3 °C22 December 2008	16.6 °C	1,245 mm	69	49
2007	36.9 °C1 August 2007	-2.5 °C10 January 2007	17.6 °C	1,035 mm	82	16
2006	37.0 °C13 August 2006	-4.7 °C8 January 2006	17.4 °C	1,017 mm	82	21
2005	39.7 °C3 July 2005	-6.3 °C2 January 2005	16.8 °C	938 mm	82	52
2004	36.7 °C24 July 2004	-6.0 °C25 January 2004	17.0 °C	1,134 mm	69	25
2003	37.7 °C2 August 2003	-6.1 °C5 January 2003	16.5 °C	1,013 mm	57	36
2002	37.3 °C15 July 2002	-4.3 °C28 December 2002	17.0 °C	1,550 mm	66	23
2001	36.8 °C22 July 2001	-4.9 °C15 January 2001	16.6 °C	1,356 mm	50	27
2000	35.8 °C22 July 2000	-5.6 °C26 January 2000	16.6 °C	1,163 mm	72	23
1999	35.2 °C11 September 1999	-6.1 °C22 December 1999	16.2 °C	1,789 mm	38	26
1998	37.2 °C10 August 1998	-6.3 °C19 January 1998	17.1 °C	1,521 mm	63	20
1997	36.7 °C5 June 1997	-5.1 °C25 January 1997	16.5 °C	1,043 mm	67	28
1996	34.6 °C7 August 1996	-5.0 °C10 February 1996	15.8 °C	1,445 mm	59	40
1995	36.7 °C7 September 1995	-4.2 °C5 February 1995	16.0 °C	1,090 mm	64	29
1994	36.0 °C1 July 1994	-3.4 °C19 January 1994	17.0 °C	933 mm	77	22
1993	35.4 °C12 July 1993	-7.0 °C17 January 1993	15.5 °C	1,679 mm	35	38
1992	36.7 °C30 July 1992	-4.9 °C15 January 1992	15.7 °C	1,117 mm	50	32
1991	34.7 °C22 July 1991	-9.3 °C30 December 1991	15.6 °C	1,770 mm	49	25
1990	36.4 °C24 July 1990	-7.5 °C1 February 1990	16.5 °C	1,500 mm	72	31
1989	36.2 °C12 August 1989	-4.2 °C15 January 1989	15.7 °C	1,486 mm	34	20
1988	37.0 °C8 July 1988	-5.2 °C17 December 1988	15.6 °C	1,017 mm	54	34
1987	34.9 °C4 August 1987	-6.8 °C14 January 1987	15.6 °C	1,540 mm	49	41
1986	35.6 °C12 August 1986	-7.9 °C5 January 1986	15.4 °C	1,159 mm	57	45
1985	35.7 °C16 July 1985	-5.9 °C9 December 1985	15.5 °C	1,529 mm	64	42
1984	35.3 °C26 July 1984	-7.4 °C22 January 1984	15.3 °C	1,185 mm	56	56
1983	37.2 °C3 August 1983	-6.5 °C19 February 1983	15.7 °C	1,527 mm	44	41
1982	34.0 °C8 July 1982	-6.9 °C19 January 1982	15.7 °C	1,164 mm	45	36
1981	34.7 °C19 June 1981	-7.3 °C3 January 1981	15.3 °C	1,317 mm	60	48
1980	35.6 °C27 July 1980	-9.3 °C5 February 1980	14.7 °C	1,480 mm	32	50
1979	35.5 °C6 August 1979	-8.6 °C19 November 1979	16.0 °C	1,018 mm	54	35
1978	37.3 °C8 July 1978	-4.9 °C10 January 1978	16.0 °C	823 mm	79	47
1977	36.5 °C6 August 1977	-11.3 °C31 January 1977	15.5 °C	1,732 mm	41	48
1976	35.7 °C5 August 1976	-6.7 °C29 December 1976	15.1 °C	1,241 mm	42	42
1975	35.1 °C19 July 1975	-4.7 °C17 December 1975	15.9 °C	1,529 mm	67	42
1974	34.4 °C5 August 1974	-4.7 °C25 February 1974	15.5 °C	1,211 mm	40	42
1973	34.7 °C4 August 1973	-9.5 °C26 December 1973	15.8 °C	1,270 mm	58	32
1972	34.9 °C7 July 1972	-6.4 °C16 January 1972	15.1 °C	1,221 mm	47	45
1971	35.8 °C15 July 1971	-6.5 °C5 February 1971	15.6 °C	1,055 mm	70	55
1970	35.3 °C7 August 1970	-9.1 °C5 January 1970	15.3 °C	1,400 mm	49	44
1969	35.6 °C17 August 1969	-13.7 °C6 February 1969	15.1 °C	1,178 mm	55	65
1968	33.7 °C18 July 1968	-6.9 °C16 January 1968	15.6 °C	971 mm	55	59
1967	36.8 °C23 August 1967	-9.2 °C16 January 1967	15.5 °C	1,031 mm	76	76
1966	38.3 °C7 August 1966	-8.7 °C27 December 1966	16.2 °C	1,248 mm	58	30
1965	34.6 °C20 July 1965	-7.1 °C17 December 1965	15.5 °C	1,183 mm	46	41
1964	37.4 °C16 July 1964	-5.1 °C3 February 1964	16.2 °C	1,208 mm	74	40
1963	35.6 °C28 July 1963	-8.4 °C4 February 1963	15.6 °C	1,362 mm	62	56
1962	36.6 °C19 July 1962	-5.0 °C2 January 1962	15.7 °C	1,502 mm	49	45
1961	36.0 °C23 July 1961	-5.3 °C12 January 1961	16.5 °C	1,288 mm	74	29
1960	36.2 °C14 July 1960	-6.1 °C19 December 1960	16.1 °C	1,625 mm	57	37
1959	38.1 °C21 August 1959	-8.1 °C5 January 1959	16.1 °C	1,133 mm	69	33
1958	36.1 °C22 July 1958	-10.4 °C16 January 1958	15.5 °C	1,122 mm	65	42
1957	36.1 °C22 July 1957	-11.4 °C12 February 1957	15.1 °C	1,736 mm	42	48
1956	36.9 °C12 July 1956	-7.7 °C24 January 1956	15.5 °C	1,580 mm	68	57
1955	36.4 °C12 September 1955	-10.1 °C16 January 1955	16.2 °C	1,059 mm	74	35
1954	35.9 °C12 August 1954	-9.1 °C30 January 1954	15.8 °C	1,837 mm	55	43
1953	37.3 °C28 July 1953	-8.6 °C18 January 1953	16.6 °C	1,248 mm	69	30
1952	34.2 °C2 August 1952	-6.7 °C19 February 1952	15.9 °C	1,781 mm	53	33
1951	36.4 °C8 August 1951	-9.5 °C13 January 1951	15.8 °C	1,582 mm	51	38
1950	35.1 °C13 July 1950	-5.2 °C5 February 1950	16.1 °C	1,521 mm	53	34
1949	34.2 °C17 September 1949	-5.9 °C6 January 1949	16.3 °C	1,795 mm	48	33
1948	33.8 °C8 August 1948	-8.3 °C26 January 1948	16.7 °C	1,276 mm	60	30
1947	34.6 °C29 July 1947	-6.4 °C19 December 1947	16.0 °C	1,103 mm	63	40
1946	39.7 °C5 August 1946	-5.5 °C29 December 1946	17.3 °C	726 mm	111	47
1945	34.2 °C9 June 1945	-14.3 °C17 January 1945	15.7 °C	962 mm	78	64
1944	35.5 °C29 June 1944	-6.4 °C20 December 1944	16.2 °C	838 mm	79	56
1943	33.5 °C2 August 1943	-7.3 °C12 January 1943	15.7 °C	1,712 mm	15	50
1942	35.9 °C7 August 1942	-6.2 °C17 January 1942	15.9 °C	1,225 mm	57	53
1941	33.6 °C10 July 1941	-6.8 °C24 January 1941	16.2 °C	1,179 mm	45	33
1940	34.0 °C14 August 1940	-7.2 °C26 January 1940	15.9 °C	1,027 mm	62	46

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

22.6 °C

+2.6 °C

Hot days (≥ 30 °C)

109 d/yr

+47

Frost days (< 0 °C)

27 d/yr

-11

Annual rainfall

1166 mm

-112 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	10.6 °C	+3.3 °C	10 mm	-34 mm
Feb	9.8 °C	+0.9 °C	14 mm	-43 mm
Mar	16.8 °C	+3.3 °C	59 mm	-26 mm
Apr	24.8 °C	+5.2 °C	37 mm	-70 mm
May	27.0 °C	+2.5 °C	136 mm	+3 mm
Jun	29.0 °C	+1.1 °C	277 mm	+33 mm
Jul	33.5 °C	+1.8 °C	207 mm	+2 mm
Aug	34.0 °C	+2.5 °C	165 mm	+20 mm
Sep	30.4 °C	+3.2 °C	199 mm	+77 mm
Oct	24.3 °C	+2.2 °C	48 mm	-8 mm
Nov	17.6 °C	+1.3 °C	9 mm	-39 mm
Dec	13.0 °C	+3.1 °C	6 mm	-27 mm

The year's extremes

Hottest day

37.0 °C

6 Jul 2025

Coldest day

-6.9 °C

9 Feb 2025

Wettest day

126.4 mm

30 Jul 2025

Windiest day

41.6 km/h

30 Jul 2025

Strongest gust

77.0 km/h

8 May 2025

Hottest feels-like

45.1 °C

20 Aug 2025

Coldest feels-like

-11.8 °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 Zhangjiagang?

Zhangjiagang has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.1 °C and it receives 1,278 mm of precipitation per year.

What is the hottest day ever recorded in Zhangjiagang?

The hottest day measured in Zhangjiagang between 1940 and 2025 was 24 July 2017, reaching 41.4 °C.

What is the coldest day in Zhangjiagang?

The coldest day measured in Zhangjiagang between 1940 and 2025 was 17 January 1945, at -14.3 °C.

Does it snow in Zhangjiagang?

Yes. Zhangjiagang gets on average 9.4 cm of snow per year and has around 38 frost days.

Has the climate of Zhangjiagang warmed?

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

What is the wettest day in Zhangjiagang?

The wettest day measured in Zhangjiagang between 1940 and 2025 was 26 July 1949, with 217 mm of rain in 24 hours.

What was the windiest day in Zhangjiagang?

The windiest day measured in Zhangjiagang between 1940 and 2025 was 22 August 1951, with winds reaching 52.4 km/h.

What is the warmest month in Zhangjiagang?

The warmest month in Zhangjiagang is July (28.4 °C on average); the coldest is January (3.4 °C).

How much does it rain in Zhangjiagang?

Zhangjiagang receives on average 1,278 mm of precipitation per year, spread over about 121 rainy days.

Is it sunny in Zhangjiagang?

Zhangjiagang 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 Zhangjiagang?

The heaviest 24-hour snowfall measured in Zhangjiagang between 1940 and 2025 was 18 January 1984, with 24.4 cm.

Are there tropical nights in Zhangjiagang?

Yes: Zhangjiagang has on average 104 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Zhangjiagang?

In Zhangjiagang, between 1940 and 2025, the highest apparent temperature reached 48.0 °C on 26 July 2016, and the lowest was -19.3 °C on 17 January 1945.

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