Heishui climate — normals and trends

Q: What is the climate of Heishui?

Heishui has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.1 °C and it receives 2,286 mm of precipitation per year.

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

The hottest day measured in Heishui between 1940 and 2025 was 16 July 2022, reaching 35.4 °C.

Q: What is the coldest day in Heishui?

The coldest day measured in Heishui between 1940 and 2025 was 20 December 1947, at -16.3 °C.

Q: Does it snow in Heishui?

Yes. Heishui gets on average 64.6 cm of snow per year and has around 34 frost days.

Q: Has the climate of Heishui warmed?

Yes: Heishui warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Heishui?

The wettest day measured in Heishui between 1940 and 2025 was 29 July 1982, with 146 mm of rain in 24 hours.

Q: What was the windiest day in Heishui?

The windiest day measured in Heishui between 1940 and 2025 was 2 July 1946, with winds reaching 31.0 km/h.

Q: What is the warmest month in Heishui?

The warmest month in Heishui is July (24.4 °C on average); the coldest is January (2.5 °C).

Q: How much does it rain in Heishui?

Heishui receives on average 2,286 mm of precipitation per year, spread over about 215 rainy days.

Q: Is it sunny in Heishui?

Heishui gets on average 5.0 hours of sunshine per day, roughly 1,825 hours per year over 1940-2025.

Heishui (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.1 °C and it receives 2,286 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 (24.4 °C on average) and the coldest is January (2.5 °C). Rainfall peaks in May.

Heishui averages 34 frost days, 22 hot days (≥ 30 °C) and 215 rainy days per year.

Heishui has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.

The number of frost days there went from about 47 to 21 per year over the period.

The hottest day of the period reached 35.4 °C (on 16 July 2022) and the coldest -16.3 °C (on 20 December 1947).

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

HeishuiChongqing Municipality

coords: 29.06°, 108.80°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthMayDriest monthDecember

Mean daily temperature

14.1°C

Average daily high

17.3°C

Average daily low

11.3°C

Annual rainfall

2,286mm

Sunshine / day

5.0h

Mean relative humidity

83%

Average peak wind

8.7km/h

Seasonal range

21.9°C

Frost days (< 0 °C)

34 d/yr

Hot days (≥ 30 °C)

22 d/yr

Rainy days (≥ 1 mm)

215 d/yr

Annual snowfall

64.6 cm

Average feels-like high

17.8 °C

Average feels-like low

11.1 °C

Average peak gust

27.2 km/h

Tropical nights (≥ 20 °C)

68 d/yr

Solar radiation

10.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.4 °C

since 1940

+0.2 °C per decade · r² = 0.47 · 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

35.4 °C

16 July 2022

Coldest day

-16.3 °C

20 December 1947

Wettest day

146 mm

29 July 1982

Windiest day

31.0 km/h

2 July 1946

Strongest gust

86.4 km/h

13 June 1946

Hottest feels-like

41.5 °C

23 July 1958

Coldest feels-like

-20.5 °C

20 December 1947

Snowiest day

21.1 cm

24 January 2001

Sunniest day

13.7 h

2 July 1973

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	34.9 °C16 July 2025	-3.5 °C9 February 2025	15.7 °C	2,093 mm	50	11
2024	34.1 °C21 July 2024	-7.9 °C23 January 2024	15.5 °C	2,111 mm	50	30
2023	33.4 °C17 August 2023	-4.1 °C18 December 2023	15.2 °C	2,084 mm	39	24
2022	35.4 °C16 July 2022	-3.7 °C8 February 2022	15.2 °C	1,669 mm	59	33
2021	34.9 °C2 August 2021	-4.3 °C7 January 2021	15.1 °C	1,960 mm	38	18
2020	32.7 °C4 August 2020	-2.3 °C20 December 2020	14.3 °C	2,556 mm	22	13
2019	34.3 °C16 August 2019	-3.6 °C1 January 2019	14.6 °C	1,759 mm	34	15
2018	33.6 °C20 July 2018	-7.4 °C29 January 2018	14.7 °C	2,038 mm	38	35
2017	34.0 °C27 July 2017	-2.6 °C20 December 2017	14.8 °C	1,760 mm	33	14
2016	34.9 °C25 August 2016	-5.6 °C23 January 2016	14.9 °C	2,131 mm	40	20
2015	32.2 °C13 July 2015	-2.8 °C1 February 2015	14.8 °C	2,043 mm	14	11
2014	34.5 °C23 July 2014	-4.5 °C10 February 2014	14.2 °C	2,125 mm	21	31
2013	33.7 °C13 August 2013	-5.4 °C4 January 2013	15.1 °C	1,576 mm	42	24
2012	32.7 °C12 August 2012	-4.3 °C23 January 2012	13.6 °C	2,070 mm	24	42
2011	34.4 °C16 August 2011	-6.8 °C2 January 2011	14.1 °C	1,387 mm	32	43
2010	33.9 °C4 August 2010	-3.6 °C17 December 2010	14.5 °C	1,994 mm	33	27
2009	33.7 °C18 July 2009	-2.9 °C24 January 2009	14.7 °C	1,713 mm	40	19
2008	32.2 °C21 August 2008	-6.4 °C27 January 2008	14.5 °C	1,823 mm	20	42
2007	32.6 °C10 August 2007	-2.8 °C9 January 2007	14.8 °C	2,200 mm	17	17
2006	33.8 °C15 July 2006	-3.7 °C18 February 2006	15.0 °C	1,615 mm	36	25
2005	33.6 °C13 August 2005	-7.7 °C22 January 2005	14.3 °C	1,875 mm	35	45
2004	32.9 °C30 June 2004	-2.8 °C29 December 2004	14.6 °C	2,062 mm	27	28
2003	33.2 °C31 July 2003	-3.5 °C5 January 2003	14.5 °C	2,324 mm	26	16
2002	34.6 °C16 July 2002	-4.6 °C26 December 2002	14.8 °C	2,739 mm	30	11
2001	33.0 °C7 August 2001	-1.8 °C25 January 2001	14.8 °C	1,983 mm	22	14
2000	32.8 °C27 July 2000	-4.9 °C31 January 2000	14.2 °C	2,316 mm	18	25
1999	32.7 °C8 August 1999	-3.3 °C22 December 1999	14.8 °C	2,106 mm	16	22
1998	32.5 °C22 August 1998	-4.1 °C19 January 1998	15.1 °C	2,492 mm	24	26
1997	34.1 °C31 August 1997	-4.1 °C3 December 1997	14.3 °C	2,389 mm	27	22
1996	32.2 °C22 August 1996	-4.6 °C19 January 1996	13.9 °C	2,530 mm	22	36
1995	33.2 °C30 July 1995	-3.1 °C29 December 1995	14.2 °C	2,790 mm	23	25
1994	33.6 °C13 August 1994	-3.1 °C19 January 1994	14.5 °C	2,230 mm	29	23
1993	30.9 °C15 July 1993	-4.6 °C15 January 1993	13.8 °C	2,566 mm	10	40
1992	33.9 °C4 August 1992	-3.9 °C16 January 1992	14.1 °C	2,121 mm	29	29
1991	33.5 °C19 July 1991	-11.6 °C5 January 1991	13.9 °C	2,487 mm	20	26
1990	33.8 °C6 August 1990	-6.1 °C1 February 1990	14.6 °C	2,052 mm	37	20
1989	34.3 °C22 July 1989	-9.8 °C23 January 1989	13.6 °C	2,477 mm	22	38
1988	34.4 °C19 July 1988	-5.0 °C17 February 1988	14.2 °C	1,770 mm	40	40
1987	32.1 °C5 August 1987	-3.9 °C16 December 1987	14.4 °C	2,566 mm	15	22
1986	32.8 °C6 August 1986	-2.5 °C9 January 1986	14.0 °C	2,190 mm	18	29
1985	32.3 °C9 August 1985	-5.9 °C10 December 1985	14.0 °C	2,117 mm	32	46
1984	32.7 °C31 July 1984	-9.4 °C22 January 1984	13.6 °C	2,188 mm	23	54
1983	32.5 °C6 August 1983	-11.8 °C12 January 1983	14.2 °C	2,689 mm	12	34
1982	33.1 °C2 August 1982	-6.0 °C31 January 1982	13.8 °C	3,037 mm	15	39
1981	33.9 °C7 August 1981	-5.6 °C27 January 1981	14.1 °C	1,903 mm	36	38
1980	33.2 °C27 July 1980	-9.2 °C31 January 1980	14.1 °C	2,618 mm	15	24
1979	32.0 °C30 July 1979	-7.1 °C29 December 1979	14.6 °C	2,080 mm	18	31
1978	33.6 °C11 July 1978	-4.2 °C5 January 1978	14.5 °C	2,040 mm	33	31
1977	33.9 °C9 August 1977	-15.6 °C30 January 1977	14.0 °C	2,389 mm	22	50
1976	32.6 °C8 August 1976	-9.1 °C28 December 1976	13.6 °C	2,270 mm	21	35
1975	34.1 °C6 August 1975	-15.3 °C16 December 1975	14.2 °C	2,351 mm	33	31
1974	31.8 °C16 July 1974	-9.1 °C19 January 1974	13.7 °C	2,161 mm	7	57
1973	32.6 °C21 August 1973	-9.3 °C18 January 1973	14.5 °C	2,175 mm	17	20
1972	33.6 °C26 August 1972	-10.9 °C8 February 1972	14.0 °C	2,203 mm	35	37
1971	35.1 °C27 July 1971	-5.6 °C14 February 1971	14.1 °C	2,196 mm	26	30
1970	33.3 °C2 August 1970	-10.8 °C7 January 1970	13.8 °C	2,331 mm	22	28
1969	34.0 °C28 July 1969	-10.5 °C31 January 1969	14.0 °C	2,000 mm	19	52
1968	32.8 °C30 July 1968	-7.5 °C10 February 1968	14.1 °C	2,480 mm	15	46
1967	34.5 °C19 July 1967	-12.7 °C2 January 1967	13.5 °C	3,075 mm	35	65
1966	31.7 °C15 August 1966	-11.5 °C29 January 1966	13.8 °C	2,024 mm	6	41
1965	30.8 °C20 July 1965	-10.9 °C20 December 1965	13.2 °C	2,582 mm	1	48
1964	33.2 °C7 August 1964	-10.0 °C27 February 1964	13.8 °C	2,613 mm	25	49
1963	32.8 °C30 August 1963	-4.0 °C14 January 1963	14.7 °C	2,739 mm	28	43
1962	33.6 °C19 July 1962	-3.5 °C26 January 1962	14.3 °C	2,272 mm	29	32
1961	34.8 °C23 June 1961	-4.7 °C17 January 1961	14.7 °C	2,322 mm	43	29
1960	32.5 °C2 August 1960	-10.3 °C26 January 1960	14.3 °C	2,547 mm	21	21
1959	32.9 °C13 July 1959	-5.2 °C23 February 1959	14.3 °C	1,871 mm	37	39
1958	33.0 °C23 July 1958	-11.5 °C2 February 1958	14.1 °C	2,334 mm	19	37
1957	33.1 °C24 August 1957	-10.1 °C11 February 1957	13.9 °C	2,453 mm	20	43
1956	30.4 °C8 July 1956	-14.7 °C24 January 1956	13.0 °C	2,382 mm	3	61
1955	28.7 °C10 September 1955	-14.4 °C12 January 1955	13.3 °C	2,598 mm	0	38
1954	29.9 °C2 September 1954	-12.2 °C7 February 1954	12.6 °C	3,461 mm	0	64
1953	33.6 °C17 August 1953	-7.9 °C19 January 1953	13.5 °C	2,841 mm	24	48
1952	29.5 °C4 July 1952	-11.9 °C14 January 1952	13.1 °C	3,184 mm	0	55
1951	30.0 °C8 August 1951	-12.4 °C13 January 1951	13.2 °C	2,925 mm	1	46
1950	31.3 °C23 July 1950	-8.9 °C19 February 1950	13.4 °C	2,563 mm	1	27
1949	29.5 °C1 September 1949	-12.0 °C9 January 1949	13.5 °C	2,670 mm	0	33
1948	30.6 °C2 July 1948	-12.3 °C10 February 1948	13.7 °C	2,715 mm	1	34
1947	30.4 °C19 May 1947	-16.3 °C20 December 1947	13.5 °C	2,412 mm	1	48
1946	32.2 °C10 August 1946	-6.7 °C21 December 1946	14.6 °C	1,908 mm	19	33
1945	29.9 °C2 August 1945	-13.3 °C26 December 1945	12.7 °C	2,081 mm	0	63
1944	31.3 °C4 August 1944	-11.3 °C7 February 1944	13.3 °C	2,067 mm	6	62
1943	29.0 °C11 July 1943	-9.7 °C23 January 1943	13.7 °C	3,424 mm	0	41
1942	28.5 °C24 July 1942	-7.9 °C14 February 1942	14.3 °C	2,322 mm	0	33
1941	30.6 °C1 June 1941	-9.2 °C31 December 1941	14.2 °C	2,345 mm	1	31
1940	31.1 °C13 July 1940	-14.4 °C3 February 1940	13.8 °C	1,819 mm	2	41

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

19.5 °C

+2.2 °C

Hot days (≥ 30 °C)

50 d/yr

+28

Frost days (< 0 °C)

11 d/yr

-23

Annual rainfall

2093 mm

-193 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	8.7 °C	+3.6 °C	67 mm	-22 mm
Feb	6.8 °C	+0.1 °C	103 mm	-12 mm
Mar	13.7 °C	+1.7 °C	129 mm	-66 mm
Apr	21.7 °C	+3.7 °C	161 mm	-90 mm
May	24.0 °C	+1.9 °C	286 mm	-17 mm
Jun	26.1 °C	+0.8 °C	344 mm	+47 mm
Jul	31.1 °C	+2.9 °C	169 mm	-116 mm
Aug	30.1 °C	+2.0 °C	224 mm	+8 mm
Sep	25.4 °C	+1.5 °C	257 mm	+85 mm
Oct	19.7 °C	+1.6 °C	201 mm	+29 mm
Nov	14.6 °C	+1.7 °C	92 mm	-25 mm
Dec	10.6 °C	+3.2 °C	62 mm	-13 mm

The year's extremes

Hottest day

34.9 °C

16 Jul 2025

Coldest day

-3.5 °C

9 Feb 2025

Wettest day

83.5 mm

26 Jun 2025

Windiest day

22.2 km/h

27 Mar 2025

Strongest gust

63.7 km/h

12 Apr 2025

Hottest feels-like

41.1 °C

5 Aug 2025

Coldest feels-like

-6.7 °C

9 Feb 2025

Snowiest day

12.5 cm

22 Feb 2025

Sunniest day

13.4 h

4 Jul 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 Heishui?

Heishui has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.1 °C and it receives 2,286 mm of precipitation per year.

What is the hottest day ever recorded in Heishui?

The hottest day measured in Heishui between 1940 and 2025 was 16 July 2022, reaching 35.4 °C.

What is the coldest day in Heishui?

The coldest day measured in Heishui between 1940 and 2025 was 20 December 1947, at -16.3 °C.

Does it snow in Heishui?

Yes. Heishui gets on average 64.6 cm of snow per year and has around 34 frost days.

Has the climate of Heishui warmed?

Yes: Heishui warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Heishui?

The wettest day measured in Heishui between 1940 and 2025 was 29 July 1982, with 146 mm of rain in 24 hours.

What was the windiest day in Heishui?

The windiest day measured in Heishui between 1940 and 2025 was 2 July 1946, with winds reaching 31.0 km/h.

What is the warmest month in Heishui?

The warmest month in Heishui is July (24.4 °C on average); the coldest is January (2.5 °C).

How much does it rain in Heishui?

Heishui receives on average 2,286 mm of precipitation per year, spread over about 215 rainy days.

Is it sunny in Heishui?

Heishui gets on average 5.0 hours of sunshine per day, roughly 1,825 hours per year over 1940-2025.

What is the biggest single-day snowfall in Heishui?

The heaviest 24-hour snowfall measured in Heishui between 1940 and 2025 was 24 January 2001, with 21.1 cm.

Are there tropical nights in Heishui?

Yes: Heishui has on average 68 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Heishui?

In Heishui, between 1940 and 2025, the highest apparent temperature reached 41.5 °C on 23 July 1958, and the lowest was -20.5 °C on 20 December 1947.

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