Sanya weather in April

In April, Sanya sees average daytime highs of 28°C and overnight lows near 24°C, with 53 mm of rain across 8.6 wet days and about 12.4 hours of daylight. It is the 7th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 28°C by the end. The sky is clear or mostly clear about 42% of the time in April, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of April to 12 h 36 min by month's end. Set against the rest of the year, April is Sanya's 5th-clearest and 7th-windiest month. For the whole year in context, see Sanya's year-round climate.

Daytime high
28°
7th warmest
Overnight low
24°
7th coldest
Rainfall
53 mm
8.6 wet days
Daylight
12 h 24 min
6:30 AM – 6:55 PM
Cloud cover
49%
5th clearest
Wind
13 km/h
7th windiest
Solar energy
5.82 kWh/m²
Travel score
6.6
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 April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 27°C in the first days to 28°C by the end.

A typical April day in Sanya reaches about 28°C in the afternoon and slips back to 24°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, April runs about 2°C warmer than March and about 2°C cooler than May.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12723
22723
32723
42723
52723
62723
72724
82724
92724
102724
112724
122724
132724
142724
152824
162824
172824
182824
192825
202825
212825
222825
232825
242825
252825
262825
272825
282825
292825
302925

How April really feels in Sanya

Once humidity and wind are folded in, April averages 6 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
6
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Sanya weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 8th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 23% of April, with mostly cloudy or overcast conditions the remaining 34%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16535
26535
36634
46634
56634
66634
76634
86634
96634
106634
116733
126634
136634
146634
156733
166733
176733
186733
196634
206733
216733
226733
236634
246634
256634
266535
276436
286337
296238
306238

Chance of precipitation in April

Any precipitation

Sanya gets around 53 mm of rain over 8.6 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
120
220
321
421
521
622
722
823
924
1025
1125
1226
1327
1428
1528
1629
1730
1831
1931
2032
2133
2234
2335
2435
2536
2637
2738
2839
2940
3041

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the oppressive band about 57% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12518687
22417698
32417689
414166910
514166712
614156713
714156515
813146616
913146418
1013136320
1113136221
1213126123
1313115926
1412115828
1512105730
1612105532
170295534
180285535
190285436
200275338
210275239
220265240
230265141
240165043
250154944
260154846
270154747
280154549
290154450
300044254

Wind in April

Winds average 13 km/h in April.

Across April, 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.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 12 min at the start of April to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over April. Sunrise moves from 6:42 AM to 6:20 AM, and sunset from 6:51 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:426:51
212.26:416:51
312.26:406:52
412.26:396:52
512.26:396:52
612.26:386:52
712.36:376:53
812.36:366:53
912.36:356:53
1012.36:346:53
1112.36:346:53
1212.36:336:54
1312.46:326:54
1412.46:316:54
1512.46:316:54
1612.46:306:55
1712.46:296:55
1812.46:286:55
1912.56:286:55
2012.56:276:56
2112.56:266:56
2212.56:256:56
2312.56:256:56
2412.56:246:57
2512.66:236:57
2612.66:236:57
2712.66:226:58
2812.66:216:58
2912.66:216:58
3012.66:206:58

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.82 kWh/m² — the sunniest month for solar.

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 — April's 5.82 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in April

Hazard calendar for Sanya

In seasonPeak

In April, Sanya sits inside its pacific typhoon 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 April a good time to visit Sanya?

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

6.6
Sightseeing
6th-best month of the year
7.0
Beach & pool
3rd-best month of the year

April is a reasonable time to visit Sanya for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sanya in April

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

In April, Sanya sees daytime highs around 28°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Sanya in April

The nearest coast averages about 26°C in April — 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 April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 11 (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 April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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
April 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).