Heshan climate

Name: Heshan
Address: CN

Heshan is warmest in July, with average highs of 32 °C, and coldest in January, when nights average 1.7 °C. June is the wettest month (296 mm) and December the driest (51 mm). Figures are 1991–2020 climate normals.

Across a full year Heshan averages 1,679 mm of rain, 148 days above 25 °C and 17 days below freezing.

China · population 1,249,807 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 32 °C
Coldest month January 1.7 °C
Driest month December 51 mm
Wettest month June 296 mm
Least cloud December 55 % cloud
Hottest on record July 39 °C
Coldest on record January -9.8 °C

What to expectHeshan through the year

Heshan has a clear annual cycle: average daily highs run from 8.9 °C in January to 32 °C in July, a swing of 23 °C in mean temperature across the year.

Counted across a normal year, 148 days a year reach 25 °C, 75 of them reach 30 °C, 17 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in July.

Rain is strongly seasonal. June averages 296 mm against 51 mm in December — 5.8 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	8.9 °C	76 mm	65 %
February	11.5 °C	90 mm	70 %
March	15.9 °C	150 mm	73 %
April	21.8 °C	181 mm	72 %
May	26.1 °C	228 mm	71 %
June	29.0 °C	296 mm	76 %
July	32.0 °C	214 mm	72 %
August	31.5 °C	154 mm	65 %
September	27.6 °C	90 mm	59 %
October	22.6 °C	74 mm	57 %
November	16.9 °C	76 mm	56 %
December	11.3 °C	51 mm	55 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	8.9 °C	1.7 °C	5.5 °C	25.6 °C	-9.8 °C	0	0	10
February	11.5 °C	4.1 °C	8.0 °C	27.3 °C	-5.2 °C	0	0	4
March	15.9 °C	8.2 °C	12.1 °C	31.3 °C	-3.2 °C	2	0	0
April	21.8 °C	14.1 °C	17.9 °C	33.6 °C	2.4 °C	9	1	0
May	26.1 °C	18.7 °C	22.3 °C	35.3 °C	9.6 °C	19	5	0
June	29.0 °C	22.8 °C	25.7 °C	35.5 °C	15.0 °C	26	13	0
July	32.0 °C	25.7 °C	28.7 °C	39.4 °C	18.4 °C	30	24	0
August	31.5 °C	24.9 °C	28.0 °C	39.1 °C	17.0 °C	29	22	0
September	27.6 °C	20.8 °C	24.0 °C	38.3 °C	12.1 °C	23	9	0
October	22.6 °C	15.2 °C	18.8 °C	35.2 °C	6.1 °C	9	1	0
November	16.9 °C	9.3 °C	13.1 °C	30.2 °C	-1.4 °C	1	0	0
December	11.3 °C	3.7 °C	7.5 °C	23.2 °C	-7.2 °C	0	0	4

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	76 mm	11	11 h/day	65 %	76 %	13 km/h
February	90 mm	12	11 h/day	70 %	77 %	14 km/h
March	150 mm	16	12 h/day	73 %	78 %	14 km/h
April	181 mm	16	13 h/day	72 %	79 %	14 km/h
May	228 mm	15	14 h/day	71 %	79 %	14 km/h
June	296 mm	17	14 h/day	76 %	82 %	13 km/h
July	214 mm	15	14 h/day	72 %	78 %	14 km/h
August	154 mm	15	13 h/day	65 %	79 %	13 km/h
September	90 mm	10	12 h/day	59 %	77 %	13 km/h
October	74 mm	9	12 h/day	57 %	75 %	13 km/h
November	76 mm	9	11 h/day	56 %	75 %	13 km/h
December	51 mm	8	10 h/day	55 %	74 %	13 km/h

How Heshan compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Heshan	32 °C	1.7 °C	1,679 mm	148
Changsha · China	33 °C	2.2 °C	1,730 mm	161
Changde · China	32 °C	1.4 °C	1,497 mm	150
Xiangtan · China	33 °C	2.5 °C	1,775 mm	164
Loudi · China	32 °C	1.8 °C	1,578 mm	151
Zhuzhou · China	33 °C	2.8 °C	1,852 mm	167
Yueyang · China	32 °C	1.6 °C	1,668 mm	151

Planning a trip? See the best time to visit Heshan.

QuestionsCommon questions about Heshan’s climate

When is the best time to visit Heshan?

That depends on what you want, so the honest answer is a comparison rather than a single month. April, May, October sit closest to 20 °C on average, July is the warmest month and December the driest. The month-by-month table above has the full picture.

How hot does Heshan get?

In July, the warmest month, daily highs average 32 °C. About 75 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average 1.7 °C in January, the coldest month. A normal year has 17 nights below freezing.

Which month is wettest in Heshan?

June, averaging 296 mm over 17 days with rain. The driest month is December with 51 mm. The year as a whole averages 1,679 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Heshan rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 28.569°, 112.347° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.