Sanya climate

Name: Sanya
Address: CN

Sanya is warmest in June, with average highs of 30 °C, and coldest in January, when nights average 18 °C. July is the wettest month (268 mm) and February the driest (9.5 mm). Figures are 1991–2020 climate normals.

Across a full year Sanya averages 1,456 mm of rain and 310 days above 25 °C.

China · population 1,031,396 · 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 June 30 °C
Coldest month January 18 °C
Driest month February 9 mm
Wettest month July 268 mm
Least cloud November 47 % cloud
Hottest on record May 34 °C
Coldest on record January 9.1 °C
Warmest sea June 29 °C

What to expectSanya through the year

Sanya has a clear annual cycle: average daily highs run from 24 °C in January to 30 °C in June, a swing of 7.5 °C in mean temperature across the year.

Counted across a normal year, 310 days a year reach 25 °C, 92 of them reach 30 °C. The warmest reading in the 1991–2020 record is 34 °C, in May.

Rain is strongly seasonal. July averages 268 mm against 9 mm in February — 28 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Sanya is warmest in June at 29 °C and coldest in February at 23 °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	24.0 °C	12 mm	50 %
February	25.1 °C	9 mm	52 %
March	27.1 °C	18 mm	54 %
April	29.1 °C	52 mm	55 %
May	30.3 °C	132 mm	70 %
June	30.4 °C	207 mm	82 %
July	30.0 °C	268 mm	77 %
August	29.9 °C	248 mm	78 %
September	29.4 °C	253 mm	73 %
October	28.4 °C	177 mm	57 %
November	26.9 °C	51 mm	47 %
December	24.6 °C	27 mm	50 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	24.0 °C	18.2 °C	20.9 °C	28.7 °C	9.1 °C	11	0
February	25.1 °C	19.4 °C	21.9 °C	29.4 °C	12.2 °C	16	0
March	27.1 °C	21.9 °C	24.1 °C	30.6 °C	13.8 °C	28	0
April	29.1 °C	24.4 °C	26.4 °C	32.7 °C	17.7 °C	30	8
May	30.3 °C	26.0 °C	27.9 °C	34.1 °C	21.5 °C	31	19
June	30.4 °C	26.7 °C	28.4 °C	33.0 °C	23.7 °C	30	21
July	30.0 °C	26.4 °C	28.1 °C	33.3 °C	23.3 °C	31	17
August	29.9 °C	26.1 °C	27.8 °C	33.0 °C	24.3 °C	31	16
September	29.4 °C	25.4 °C	27.2 °C	32.1 °C	21.6 °C	30	10
October	28.4 °C	23.9 °C	25.9 °C	31.4 °C	15.9 °C	31	2
November	26.9 °C	21.9 °C	24.1 °C	30.3 °C	14.2 °C	26	0
December	24.6 °C	19.1 °C	21.6 °C	28.5 °C	10.1 °C	15	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	12 mm	2	11 h/day	50 %	77 %	21 km/h	23.3 °C
February	9 mm	2	12 h/day	52 %	80 %	19 km/h	23.0 °C
March	18 mm	4	12 h/day	54 %	82 %	18 km/h	24.1 °C
April	52 mm	8	13 h/day	55 %	83 %	17 km/h	26.3 °C
May	132 mm	19	13 h/day	70 %	85 %	15 km/h	28.3 °C
June	207 mm	22	13 h/day	82 %	85 %	18 km/h	29.0 °C
July	268 mm	23	13 h/day	77 %	85 %	19 km/h	28.7 °C
August	248 mm	24	13 h/day	78 %	86 %	18 km/h	28.6 °C
September	253 mm	22	12 h/day	73 %	85 %	17 km/h	28.7 °C
October	177 mm	13	12 h/day	57 %	81 %	21 km/h	27.7 °C
November	51 mm	5	11 h/day	47 %	78 %	22 km/h	26.4 °C
December	27 mm	3	11 h/day	50 %	75 %	22 km/h	24.8 °C

How Sanya 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
Sanya	30 °C	18 °C	1,456 mm	310
Wanning · China	30 °C	18 °C	1,603 mm	258
Basuo · China	31 °C	17 °C	1,434 mm	299
Nada · China	32 °C	15 °C	1,390 mm	287
Qionghai · China	31 °C	17 °C	1,469 mm	268
Wenchang · China	31 °C	17 °C	1,472 mm	275
Haikou · China	31 °C	17 °C	1,353 mm	250

Where Sanya ranks

Ranking	Position	Value
Best beach destinations in Asia in March	10th of 50	97/100
Best beach destinations in Asia year-round	14th of 50	81/100
Best beach destinations in the world in March	16th of 50	97/100
Best beach destinations in Asia in November	20th of 50	95/100
Best beach destinations in Asia in April	24th of 50	87/100
Best beach destinations in the world in November	32nd of 50	95/100

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

QuestionsCommon questions about Sanya’s climate

When is the best time to visit Sanya?

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

How hot does Sanya get?

In June, the warmest month, daily highs average 30 °C. About 92 days a year pass 30 °C. The highest value in the 1991–2020 record is 34 °C.

How cold does it get in winter?

Nights average 18 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Sanya?

July, averaging 268 mm over 23 days with rain. The driest month is February with 9 mm. The year as a whole averages 1,456 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 Sanya 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: 18.254°, 109.509° (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.