Huai'an climate

Name: Huai'an
Address: CN

Huai'an is warmest in July, with average highs of 31 °C, and coldest in January, when nights average -2.7 °C. July is the wettest month (245 mm) and December the driest (25 mm). Figures are 1991–2020 climate normals.

Across a full year Huai'an averages 1,015 mm of rain, 135 days above 25 °C and 66 days below freezing.

China · population 2,494,013 · 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 31 °C
Coldest month January -2.7 °C
Driest month December 25 mm
Wettest month July 245 mm
Least cloud December 46 % cloud
Hottest on record June 37 °C
Coldest on record December -15 °C

What to expectHuai'an through the year

Huai'an has a clear annual cycle: average daily highs run from 6.4 °C in January to 31 °C in July, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 135 days a year reach 25 °C, 55 of them reach 30 °C, 66 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in June.

Rain is strongly seasonal. July averages 245 mm against 25 mm in December — 9.7 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	6.4 °C	31 mm	52 %
February	9.2 °C	32 mm	58 %
March	14.1 °C	51 mm	61 %
April	20.4 °C	54 mm	60 %
May	25.6 °C	85 mm	64 %
June	29.2 °C	141 mm	67 %
July	30.8 °C	245 mm	70 %
August	30.1 °C	181 mm	63 %
September	26.4 °C	87 mm	56 %
October	21.7 °C	41 mm	51 %
November	15.1 °C	42 mm	48 %
December	8.5 °C	25 mm	46 %

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	6.4 °C	-2.7 °C	1.7 °C	18.6 °C	-14.5 °C	0	0	25
February	9.2 °C	-0.6 °C	4.2 °C	25.5 °C	-13.0 °C	0	0	17
March	14.1 °C	4.1 °C	8.9 °C	27.6 °C	-5.9 °C	0	0	4
April	20.4 °C	10.2 °C	15.1 °C	33.4 °C	0.0 °C	5	0	0
May	25.6 °C	15.9 °C	20.6 °C	35.0 °C	5.8 °C	18	4	0
June	29.2 °C	20.3 °C	24.6 °C	37.4 °C	13.9 °C	27	13	0
July	30.8 °C	24.2 °C	27.2 °C	37.4 °C	16.6 °C	30	19	0
August	30.1 °C	23.5 °C	26.5 °C	37.2 °C	15.1 °C	29	17	0
September	26.4 °C	18.6 °C	22.2 °C	34.4 °C	10.5 °C	21	2	0
October	21.7 °C	12.5 °C	16.8 °C	31.4 °C	2.3 °C	5	0	0
November	15.1 °C	5.9 °C	10.3 °C	26.6 °C	-8.2 °C	0	0	2
December	8.5 °C	-0.7 °C	3.7 °C	19.5 °C	-14.8 °C	0	0	18

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	31 mm	5	10 h/day	52 %	68 %	15 km/h
February	32 mm	6	11 h/day	58 %	68 %	16 km/h
March	51 mm	7	12 h/day	61 %	67 %	18 km/h
April	54 mm	7	13 h/day	60 %	67 %	18 km/h
May	85 mm	7	14 h/day	64 %	68 %	17 km/h
June	141 mm	9	14 h/day	67 %	73 %	16 km/h
July	245 mm	16	14 h/day	70 %	82 %	15 km/h
August	181 mm	15	13 h/day	63 %	83 %	15 km/h
September	87 mm	8	12 h/day	56 %	77 %	14 km/h
October	41 mm	5	11 h/day	51 %	70 %	14 km/h
November	42 mm	5	10 h/day	48 %	70 %	15 km/h
December	25 mm	4	9.9 h/day	46 %	68 %	15 km/h

How Huai'an 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
Huai'an	31 °C	-2.7 °C	1,015 mm	135
Suqian · China	31 °C	-3.4 °C	951 mm	138
Yancheng · China	31 °C	-2.0 °C	1,104 mm	129
Lianyungang · China	30 °C	-2.9 °C	931 mm	128
Pizhou · China	31 °C	-3.7 °C	914 mm	138

Where Huai'an ranks

Ranking	Position	Value
Places with the best weather in Asia in October	33rd of 50	96/100
Places with the best weather in the world in October	38th of 50	96/100

Planning a trip? See the best time to visit Huai'an.

QuestionsCommon questions about Huai'an’s climate

When is the best time to visit Huai'an?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, September, 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 Huai'an get?

In July, the warmest month, daily highs average 31 °C. About 55 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.

How cold does it get in winter?

Nights average -2.7 °C in January, the coldest month. A normal year has 66 nights below freezing.

Which month is wettest in Huai'an?

July, averaging 245 mm over 16 days with rain. The driest month is December with 25 mm. The year as a whole averages 1,015 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 Huai'an 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: 33.589°, 119.019° (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.