Heshan climate — normals and trends

Q: What is the climate of Heshan?

Heshan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.6 °C and it receives 1,776 mm of precipitation per year.

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

The hottest day measured in Heshan between 1940 and 2025 was 13 August 1953, reaching 42.1 °C.

Q: What is the coldest day in Heshan?

The coldest day measured in Heshan between 1940 and 2025 was 11 January 1955, at -18.0 °C.

Q: Does it snow in Heshan?

Yes. Heshan gets on average 19.8 cm of snow per year and has around 15 frost days.

Q: Has the climate of Heshan warmed?

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

Q: What is the wettest day in Heshan?

The wettest day measured in Heshan between 1940 and 2025 was 27 June 1979, with 160 mm of rain in 24 hours.

Q: What was the windiest day in Heshan?

The windiest day measured in Heshan between 1940 and 2025 was 14 June 1946, with winds reaching 47.7 km/h.

Q: What is the warmest month in Heshan?

The warmest month in Heshan is July (29.3 °C on average); the coldest is January (5.2 °C).

Q: How much does it rain in Heshan?

Heshan receives on average 1,776 mm of precipitation per year, spread over about 163 rainy days.

Q: Is it sunny in Heshan?

Heshan gets on average 6.8 hours of sunshine per day, roughly 2,482 hours per year over 1940-2025.

Heshan (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.6 °C and it receives 1,776 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 (29.3 °C on average) and the coldest is January (5.2 °C). Rainfall peaks in June.

Heshan averages 15 frost days, 86 hot days (≥ 30 °C) and 163 rainy days per year.

Heshan 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 22 to 8 per year over the period.

The hottest day of the period reached 42.1 °C (on 13 August 1953) and the coldest -18.0 °C (on 11 January 1955).

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

HeshanHunan

coords: 28.57°, 112.35°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthJuneDriest monthDecember

Mean daily temperature

17.6°C

Average daily high

21.3°C

Average daily low

14.3°C

Annual rainfall

1,776mm

Sunshine / day

6.8h

Mean relative humidity

78%

Average peak wind

13.5km/h

Seasonal range

24.1°C

Frost days (< 0 °C)

15 d/yr

Hot days (≥ 30 °C)

86 d/yr

Rainy days (≥ 1 mm)

163 d/yr

Annual snowfall

19.8 cm

Average feels-like high

22.4 °C

Average feels-like low

14.4 °C

Average peak gust

28.5 km/h

Tropical nights (≥ 20 °C)

122 d/yr

Solar radiation

12.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.0 °C

since 1940

+0.1 °C per decade · r² = 0.21 · 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

42.1 °C

13 August 1953

Coldest day

-18.0 °C

11 January 1955

Wettest day

160 mm

27 June 1979

Windiest day

47.7 km/h

14 June 1946

Strongest gust

95.8 km/h

14 June 1946

Hottest feels-like

47.3 °C

24 July 2024

Coldest feels-like

-23.2 °C

11 January 1955

Snowiest day

18.1 cm

22 January 1998

Sunniest day

13.1 h

4 July 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	38.0 °C5 July 2025	-3.2 °C9 February 2025	19.5 °C	1,491 mm	111	4
2024	40.0 °C22 July 2024	-7.4 °C23 January 2024	19.2 °C	1,699 mm	109	19
2023	37.8 °C5 August 2023	-3.1 °C23 December 2023	18.8 °C	1,502 mm	98	12
2022	39.4 °C18 August 2022	-2.8 °C18 December 2022	18.9 °C	1,380 mm	116	2
2021	37.6 °C2 August 2021	-3.7 °C9 January 2021	18.7 °C	1,596 mm	106	8
2020	36.7 °C24 August 2020	-1.4 °C31 December 2020	17.9 °C	1,800 mm	85	4
2019	38.7 °C13 September 2019	-1.6 °C1 January 2019	18.2 °C	1,287 mm	100	7
2018	37.5 °C31 July 2018	-6.3 °C30 January 2018	18.3 °C	1,262 mm	98	21
2017	39.2 °C26 July 2017	-1.1 °C18 December 2017	18.2 °C	1,622 mm	79	2
2016	38.2 °C26 July 2016	-5.1 °C25 January 2016	18.0 °C	1,913 mm	81	7
2015	36.4 °C13 July 2015	-1.8 °C6 February 2015	18.0 °C	1,526 mm	67	4
2014	37.6 °C22 July 2014	-3.5 °C11 February 2014	18.0 °C	1,630 mm	63	11
2013	38.7 °C31 July 2013	-2.7 °C4 January 2013	18.7 °C	1,296 mm	108	13
2012	39.4 °C11 July 2012	-3.4 °C25 January 2012	17.3 °C	1,712 mm	84	12
2011	40.2 °C25 July 2011	-2.4 °C8 January 2011	17.8 °C	982 mm	96	19
2010	39.7 °C4 August 2010	-1.7 °C5 January 2010	18.0 °C	1,698 mm	86	10
2009	38.8 °C18 July 2009	-3.2 °C14 January 2009	18.2 °C	1,271 mm	97	12
2008	37.5 °C27 July 2008	-4.4 °C29 January 2008	18.2 °C	1,238 mm	101	31
2007	37.2 °C6 August 2007	-0.2 °C9 January 2007	18.5 °C	1,243 mm	97	1
2006	37.6 °C15 August 2006	-2.6 °C7 January 2006	18.5 °C	1,280 mm	94	7
2005	37.0 °C17 July 2005	-3.3 °C1 January 2005	17.8 °C	1,665 mm	91	17
2004	37.1 °C30 June 2004	-2.5 °C31 December 2004	18.2 °C	1,642 mm	77	11
2003	38.6 °C1 August 2003	-3.7 °C8 January 2003	17.8 °C	1,409 mm	90	9
2002	38.4 °C16 July 2002	-2.1 °C27 December 2002	18.0 °C	2,268 mm	79	4
2001	39.4 °C7 August 2001	-2.6 °C26 December 2001	18.1 °C	1,523 mm	94	10
2000	38.2 °C17 July 2000	-2.9 °C27 January 2000	17.5 °C	1,958 mm	96	7
1999	36.6 °C8 August 1999	-4.6 °C23 December 1999	17.9 °C	2,173 mm	65	5
1998	38.5 °C24 August 1998	-1.8 °C26 January 1998	18.6 °C	2,271 mm	93	11
1997	35.8 °C30 July 1997	-2.9 °C9 January 1997	17.7 °C	1,969 mm	83	8
1996	36.2 °C25 July 1996	-2.9 °C19 February 1996	17.2 °C	1,935 mm	77	11
1995	39.1 °C22 July 1995	-2.2 °C6 January 1995	17.9 °C	2,112 mm	84	15
1994	38.5 °C3 July 1994	-2.7 °C22 January 1994	17.7 °C	2,117 mm	87	5
1993	36.5 °C17 July 1993	-4.1 °C25 January 1993	16.9 °C	2,155 mm	60	14
1992	39.0 °C30 July 1992	-3.9 °C15 January 1992	17.7 °C	1,527 mm	81	4
1991	37.6 °C29 July 1991	-6.4 °C29 December 1991	17.1 °C	2,062 mm	76	6
1990	39.7 °C25 July 1990	-4.8 °C1 February 1990	17.7 °C	2,031 mm	91	7
1989	39.2 °C22 July 1989	-6.4 °C14 January 1989	16.8 °C	1,948 mm	58	13
1988	38.2 °C10 July 1988	-1.7 °C20 February 1988	17.4 °C	1,749 mm	84	11
1987	36.0 °C5 August 1987	-1.8 °C7 December 1987	17.5 °C	1,862 mm	80	6
1986	37.6 °C14 August 1986	-1.1 °C6 February 1986	17.4 °C	1,751 mm	93	8
1985	37.2 °C16 July 1985	-6.1 °C13 December 1985	17.1 °C	1,597 mm	88	23
1984	37.0 °C16 July 1984	-5.1 °C26 January 1984	16.6 °C	1,714 mm	85	31
1983	38.3 °C5 August 1983	-7.8 °C12 January 1983	17.6 °C	1,600 mm	82	11
1982	37.7 °C15 July 1982	-4.9 °C16 February 1982	17.0 °C	2,080 mm	64	16
1981	38.6 °C20 August 1981	-1.8 °C26 January 1981	17.4 °C	1,623 mm	93	10
1980	37.0 °C27 July 1980	-8.0 °C31 January 1980	17.0 °C	1,829 mm	66	23
1979	37.5 °C9 August 1979	-8.0 °C31 January 1979	17.7 °C	1,859 mm	83	15
1978	37.7 °C12 July 1978	-3.3 °C19 January 1978	17.6 °C	1,499 mm	87	15
1977	38.1 °C7 August 1977	-8.4 °C11 February 1977	17.2 °C	1,889 mm	73	32
1976	38.2 °C5 August 1976	-4.2 °C28 December 1976	16.8 °C	1,858 mm	58	15
1975	37.2 °C20 July 1975	-8.5 °C15 December 1975	17.3 °C	1,832 mm	81	21
1974	37.2 °C9 August 1974	-6.5 °C25 February 1974	17.2 °C	1,567 mm	81	22
1973	36.3 °C7 August 1973	-3.1 °C25 December 1973	17.5 °C	2,028 mm	72	6
1972	40.2 °C13 August 1972	-7.0 °C9 February 1972	17.2 °C	1,608 mm	79	18
1971	38.8 °C26 July 1971	-3.9 °C8 December 1971	17.1 °C	1,671 mm	74	15
1970	38.1 °C11 August 1970	-10.6 °C7 January 1970	16.9 °C	2,064 mm	74	15
1969	37.6 °C2 August 1969	-10.0 °C6 February 1969	17.0 °C	2,354 mm	88	38
1968	38.1 °C30 July 1968	-3.5 °C3 February 1968	17.5 °C	1,516 mm	86	20
1967	37.7 °C29 August 1967	-9.2 °C2 January 1967	16.9 °C	2,177 mm	93	38
1966	39.0 °C12 August 1966	-7.3 °C28 December 1966	18.1 °C	1,781 mm	94	20
1965	36.2 °C21 July 1965	-4.6 °C19 December 1965	17.0 °C	2,108 mm	69	14
1964	38.2 °C22 July 1964	-5.3 °C27 February 1964	17.1 °C	2,061 mm	85	24
1963	39.4 °C6 August 1963	-3.0 °C13 January 1963	18.2 °C	1,560 mm	107	16
1962	37.6 °C28 July 1962	-3.6 °C2 January 1962	17.5 °C	1,812 mm	79	15
1961	42.0 °C24 July 1961	-3.2 °C13 January 1961	18.2 °C	2,003 mm	98	11
1960	37.0 °C2 August 1960	-9.9 °C26 January 1960	17.3 °C	1,642 mm	87	19
1959	37.6 °C24 July 1959	-3.6 °C11 January 1959	17.7 °C	1,457 mm	100	12
1958	36.9 °C23 July 1958	-7.9 °C2 February 1958	17.1 °C	1,609 mm	79	17
1957	37.5 °C16 July 1957	-11.7 °C7 February 1957	16.8 °C	1,756 mm	69	26
1956	36.9 °C9 July 1956	-12.8 °C23 January 1956	17.0 °C	1,847 mm	101	33
1955	34.8 °C21 September 1955	-18.0 °C11 January 1955	16.9 °C	1,972 mm	82	30
1954	34.7 °C15 August 1954	-8.4 °C8 February 1954	16.3 °C	2,765 mm	86	38
1953	42.1 °C13 August 1953	-4.8 °C19 January 1953	18.0 °C	1,763 mm	103	17
1952	35.2 °C5 July 1952	-7.2 °C19 February 1952	16.8 °C	2,317 mm	75	18
1951	38.6 °C7 September 1951	-14.6 °C14 January 1951	17.0 °C	2,196 mm	86	31
1950	36.2 °C18 July 1950	-7.9 °C18 February 1950	17.2 °C	2,007 mm	57	17
1949	34.2 °C22 July 1949	-11.7 °C9 January 1949	17.5 °C	2,435 mm	80	15
1948	34.8 °C11 August 1948	-7.9 °C9 February 1948	17.3 °C	2,549 mm	76	17
1947	36.5 °C27 August 1947	-10.3 °C20 December 1947	17.5 °C	2,034 mm	86	20
1946	41.1 °C9 August 1946	-4.0 °C22 December 1946	20.0 °C	1,104 mm	133	14
1945	35.4 °C27 July 1945	-8.8 °C26 December 1945	16.8 °C	1,171 mm	94	40
1944	35.5 °C15 July 1944	-5.4 °C21 December 1944	17.7 °C	1,683 mm	98	22
1943	32.9 °C1 August 1943	-3.2 °C8 February 1943	17.7 °C	2,106 mm	59	7
1942	35.5 °C4 August 1942	-2.7 °C12 January 1942	18.4 °C	1,650 mm	83	10
1941	33.8 °C11 July 1941	-8.3 °C29 December 1941	17.9 °C	2,000 mm	63	14
1940	36.1 °C17 August 1940	-10.8 °C25 January 1940	18.0 °C	1,418 mm	102	15

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

+2.3 °C

Hot days (≥ 30 °C)

111 d/yr

+25

Frost days (< 0 °C)

4 d/yr

-11

Annual rainfall

1492 mm

-285 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	13.9 °C	+5.4 °C	49 mm	-22 mm
Feb	10.7 °C	+0.5 °C	61 mm	-39 mm
Mar	17.8 °C	+2.5 °C	114 mm	-51 mm
Apr	25.9 °C	+4.4 °C	253 mm	+34 mm
May	28.0 °C	+2.0 °C	191 mm	-70 mm
Jun	30.0 °C	+0.6 °C	320 mm	+22 mm
Jul	34.8 °C	+1.8 °C	169 mm	-18 mm
Aug	34.7 °C	+2.3 °C	56 mm	-97 mm
Sep	28.6 °C	+0.4 °C	144 mm	+49 mm
Oct	23.3 °C	+0.7 °C	37 mm	-59 mm
Nov	18.9 °C	+2.0 °C	64 mm	-16 mm
Dec	15.0 °C	+3.9 °C	35 mm	-19 mm

The year's extremes

Hottest day

38.0 °C

5 Jul 2025

Coldest day

-3.2 °C

9 Feb 2025

Wettest day

109.6 mm

22 Apr 2025

Windiest day

35.7 km/h

12 Apr 2025

Strongest gust

74.2 km/h

12 Apr 2025

Hottest feels-like

46.2 °C

6 Jul 2025

Coldest feels-like

-7.0 °C

9 Feb 2025

Snowiest day

0.1 cm

29 Mar 2025

Sunniest day

13.0 h

1 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 Heshan?

Heshan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.6 °C and it receives 1,776 mm of precipitation per year.

What is the hottest day ever recorded in Heshan?

The hottest day measured in Heshan between 1940 and 2025 was 13 August 1953, reaching 42.1 °C.

What is the coldest day in Heshan?

The coldest day measured in Heshan between 1940 and 2025 was 11 January 1955, at -18.0 °C.

Does it snow in Heshan?

Yes. Heshan gets on average 19.8 cm of snow per year and has around 15 frost days.

Has the climate of Heshan warmed?

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

What is the wettest day in Heshan?

The wettest day measured in Heshan between 1940 and 2025 was 27 June 1979, with 160 mm of rain in 24 hours.

What was the windiest day in Heshan?

The windiest day measured in Heshan between 1940 and 2025 was 14 June 1946, with winds reaching 47.7 km/h.

What is the warmest month in Heshan?

The warmest month in Heshan is July (29.3 °C on average); the coldest is January (5.2 °C).

How much does it rain in Heshan?

Heshan receives on average 1,776 mm of precipitation per year, spread over about 163 rainy days.

Is it sunny in Heshan?

Heshan gets on average 6.8 hours of sunshine per day, roughly 2,482 hours per year over 1940-2025.

What is the biggest single-day snowfall in Heshan?

The heaviest 24-hour snowfall measured in Heshan between 1940 and 2025 was 22 January 1998, with 18.1 cm.

Are there tropical nights in Heshan?

Yes: Heshan has on average 122 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Heshan?

In Heshan, between 1940 and 2025, the highest apparent temperature reached 47.3 °C on 24 July 2024, and the lowest was -23.2 °C on 11 January 1955.

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