Weihai climate

Name: Weihai
Address: CN

Weihai is warmest in August, with average highs of 27 °C, and coldest in January, when nights average -1.8 °C. July is the wettest month (155 mm) and January the driest (18 mm). Figures are 1991–2020 climate normals.

Across a full year Weihai averages 700 mm of rain, 67 days above 25 °C and 60 days below freezing.

China · population 844,310 · 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 August 27 °C
Coldest month January -1.8 °C
Driest month January 18 mm
Wettest month July 155 mm
Least cloud October 43 % cloud
Hottest on record July 36 °C
Coldest on record January -12 °C
Warmest sea August 24 °C

What to expectWeihai through the year

Weihai has a clear annual cycle: average daily highs run from 1.8 °C in January to 27 °C in August, a swing of 25 °C in mean temperature across the year.

Counted across a normal year, 67 days a year reach 25 °C, 7 of them reach 30 °C, 60 nights drop below freezing. The warmest reading in the 1991–2020 record is 36 °C, in July.

Rain is strongly seasonal. July averages 155 mm against 18 mm in January — 8.6 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Weihai is warmest in August at 24 °C and coldest in February at 4.1 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	1.8 °C	18 mm	60 %
February	3.1 °C	19 mm	51 %
March	7.2 °C	22 mm	44 %
April	13.2 °C	43 mm	46 %
May	19.0 °C	69 mm	49 %
June	23.6 °C	70 mm	56 %
July	26.6 °C	155 mm	61 %
August	26.9 °C	136 mm	55 %
September	23.6 °C	58 mm	47 %
October	18.1 °C	36 mm	43 %
November	11.2 °C	43 mm	49 %
December	4.6 °C	34 mm	59 %

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	1.8 °C	-1.8 °C	0.1 °C	10.2 °C	-11.9 °C	0	0	24
February	3.1 °C	-1.1 °C	1.1 °C	14.6 °C	-9.8 °C	0	0	18
March	7.2 °C	2.5 °C	4.8 °C	22.1 °C	-4.6 °C	0	0	6
April	13.2 °C	7.8 °C	10.2 °C	26.4 °C	-0.4 °C	0	0	0
May	19.0 °C	13.5 °C	16.0 °C	34.6 °C	6.5 °C	3	0	0
June	23.6 °C	18.6 °C	20.9 °C	33.5 °C	12.2 °C	10	1	0
July	26.6 °C	22.6 °C	24.5 °C	35.7 °C	17.1 °C	22	4	0
August	26.9 °C	23.4 °C	25.0 °C	34.0 °C	17.1 °C	26	3	0
September	23.6 °C	19.7 °C	21.7 °C	31.1 °C	13.1 °C	7	0	0
October	18.1 °C	14.0 °C	16.0 °C	27.5 °C	4.7 °C	0	0	0
November	11.2 °C	6.9 °C	9.2 °C	22.5 °C	-3.1 °C	0	0	1
December	4.6 °C	0.8 °C	2.8 °C	14.2 °C	-7.8 °C	0	0	12

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	18 mm	4	9.9 h/day	60 %	65 %	30 km/h	5.5 °C
February	19 mm	3	11 h/day	51 %	66 %	29 km/h	4.1 °C
March	22 mm	4	12 h/day	44 %	68 %	29 km/h	4.8 °C
April	43 mm	5	13 h/day	46 %	69 %	29 km/h	8.2 °C
May	69 mm	6	14 h/day	49 %	72 %	27 km/h	13.1 °C
June	70 mm	6	15 h/day	56 %	79 %	24 km/h	18.0 °C
July	155 mm	10	15 h/day	61 %	86 %	22 km/h	22.1 °C
August	136 mm	9	14 h/day	55 %	84 %	22 km/h	24.4 °C
September	58 mm	5	12 h/day	47 %	73 %	24 km/h	23.0 °C
October	36 mm	5	11 h/day	43 %	65 %	27 km/h	19.5 °C
November	43 mm	7	10 h/day	49 %	66 %	30 km/h	14.3 °C
December	34 mm	7	9.6 h/day	59 %	65 %	31 km/h	9.2 °C

How Weihai 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
Weihai	27 °C	-1.8 °C	700 mm	67
Yantai · China	29 °C	-3.6 °C	656 mm	101
Laixi · China	30 °C	-5.1 °C	711 mm	122
Dalian · China	27 °C	-4.8 °C	621 mm	54
Laizhou · China	30 °C	-4.0 °C	629 mm	120
Pingdu · China	31 °C	-5.4 °C	711 mm	131
Qingdao · China	27 °C	-1.9 °C	722 mm	65

Where Weihai ranks

Ranking	Position	Value
Best beach destinations in Asia in August	40th of 50	86/100
Best beach destinations in Asia in September	41st of 50	85/100
The coolest places in Asia in May	42nd of 50	19 °C
The coolest places in Asia in April	50th of 50	13 °C

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

QuestionsCommon questions about Weihai’s climate

When is the best time to visit Weihai?

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

How hot does Weihai get?

In August, the warmest month, daily highs average 27 °C. About 7 days a year pass 30 °C. The highest value in the 1991–2020 record is 36 °C.

How cold does it get in winter?

Nights average -1.8 °C in January, the coldest month. A normal year has 60 nights below freezing.

Which month is wettest in Weihai?

July, averaging 155 mm over 10 days with rain. The driest month is January with 18 mm. The year as a whole averages 700 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 Weihai 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: 37.509°, 122.114° (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.