Sanya weather in July

In July, Sanya sees average daytime highs of 29°C and overnight lows near 26°C, with 280 mm of rain across 23 wet days and about 13 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 15% of the time in July, and the air most often feels miserable.

Daylight stretches from about 13 h 06 min at the start of July to 12 h 48 min by month's end. Set against the rest of the year, July is Sanya's 10th-clearest and 8th-windiest month. For the whole year in context, see Sanya's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
26°
11th coldest
Rainfall
280 mm
23 wet days
Daylight
13 hours
6:18 AM – 7:18 PM
Cloud cover
77%
10th clearest
Wind
12 km/h
8th windiest
Solar energy
5.37 kWh/m²
Travel score
3.6
out of 10

Sanya is prefecture-level city in Hainan, China.

Air quality
Elevated
PM2.5 15.5 µg/m³ · 2018
Density
537/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical July day in Sanya reaches about 29°C in the afternoon and slips back to 26°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, July runs on par with June and on par with August.

25°28°30°33°35°151015202531
Avg high (°C)Avg low (°C)
13027
23027
33027
43027
53027
63027
73027
83027
92927
102927
112927
122927
132927
142927
152927
162927
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272926
282926
292926
302926
312926

How July really feels in Sanya

Once humidity and wind are folded in, July averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sanya weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 19°122.3118.2
Feb24° / 19°102.511.48.2
Mar25° / 22°183.811.97.9
Apr28° / 24°538.612.46.6
May29° / 26°1391912.84.3
Jun30° / 27°21222.213.13.4
Jul29° / 26°28023133.6
Aug29° / 26°26124.412.63.5
Sep29° / 26°25822.312.13.8
Oct28° / 24°1821411.65.7
Nov26° / 22°545.611.17.5
Dec24° / 19°26310.98.2

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 11% of July, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12575
22674
32674
42773
52872
62872
72971
82971
92971
102971
113070
123070
133070
142971
152971
162872
172773
182674
192674
202575
212575
222575
232476
242476
252476
262377
272377
282476
292476
302476
312476

Chance of precipitation in July

Any precipitation

Sanya gets around 280 mm of rain over 23 wet days in July, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 74% and peaks near 78% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
175
274
374
474
574
673
773
873
972
1072
1172
1271
1371
1471
1572
1672
1773
1873
1973
2074
2174
2275
2375
2475
2576
2676
2777
2877
2977
3078
3178

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the miserable band about 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1298
2298
3397
4397
5397
6397
7397
8397
9397
10397
11397
12397
13397
14397
15397
16397
17496
18496
19496
20496
21496
22595
23595
24595
25595
26595
27595
28595
29595
30595
31595

Wind in July

Winds average 12 km/h in July.

Across July, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 h 06 min at the start of July to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over July. Sunrise moves from 6:13 AM to 6:23 AM, and sunset from 7:18 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.16:137:18
213.16:137:18
313.16:137:18
413.16:147:18
513.16:147:18
613.16:147:18
713.16:157:18
813.16:157:18
913.06:157:18
1013.06:167:18
1113.06:167:18
1213.06:167:18
1313.06:177:18
1413.06:177:18
1513.06:177:18
1613.06:187:18
1713.06:187:17
1813.06:187:17
1913.06:197:17
2013.06:197:17
2113.06:197:17
2212.96:207:16
2312.96:207:16
2412.96:207:16
2512.96:217:16
2612.96:217:15
2712.96:217:15
2812.96:227:15
2912.96:227:14
3012.96:227:14
3112.86:237:13

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.37 kWh/m².

For context, solar energy here swings from a low near 3.79 kWh/m² to a high of 5.82 kWh/m² in April across the year — July's 5.37 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.4Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.1Bright
315.1Bright
Planning a trip in July

Hazard calendar for Sanya

In seasonPeak

In July, Sanya sits inside its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.

Sanya sits in the Pacific typhoon belt; the season peaks July–October.

Sanya's monsoon runs May–October, when most of the year's rain falls.

Pacific typhoon
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Sanya?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.6
Sightseeing
10th-best month of the year
4.8
Beach & pool
10th-best month of the year

July is a weaker month for outdoor sightseeing in Sanya.

What to pack for Sanya in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Sanya sees daytime highs around 29°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Sanya in July

The nearest coast averages about 29°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 km away) is warmest in June at about 29°C and coldest in February near 23°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar24Warm
Apr26Warm
May28Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Warm
Nov26Warm
Dec25Warm

UV index in Sanya in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sanya peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighAug 11UV 13Dec 16UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar11Extreme
Apr11Extreme
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Sanya in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Sanya is worst in December — around 23 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (August, 11 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Sanya's WHO annual average of 15.5 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateDec 1922 µg/m³Aug 1411 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb19Moderate
Mar17Moderate
Apr15Moderate
May11Good
Jun12Good
Jul11Good
Aug11Good
Sep11Good
Oct18Moderate
Nov18Moderate
Dec23Moderate
Location & terrain

Where is Sanya?

Sanya sits at 18.3°N, 109.5°E, 1 m above sea level, in China. The nearest listed city is An Hải, 278 km away.

Topography around Sanya

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sanya.

Within 3 km, the terrain around Sanya has only modest variations in elevation — a maximum elevation change of 203 m around an average of 24 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 610 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,775 m.

The land around Sanya is covered by trees (42%), artificial surfaces (32%) and water (22%) within 3 km, water (45%) and trees (41%) within 16 km, and trees (50%) and water (45%) within 80 km.

3 km
203 m
16 km
610 m
80 km
1,775 m
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: An Hải 278 km · Da Nang 279 km · Sơn Trà 279 km · Thanh Khê 280 km · Hòa Cường 283 km · Hương Thủy 284 km · Hue 285 km · Cẩm Lệ 285 km

China travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / I
220 V · 50 Hz
Prices
≈ 47% of US
price level, 2025
GDP per capita
$13,862
2025
Happiness
6.1 / 10
World Happiness, 2025
Homicide rate
0.5
per 100k, 2020
Road deaths
17.4
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 464
Religion
unaffiliated 52%folk religion 22%Buddhist 18%Christian 5%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sanya (18.2543°, 109.5095°, elevation 1 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).