Hainan weather in July

In July, Hainan sees average daytime highs of 27°C and overnight lows near 18°C, with 162 mm of rain across 14.7 wet days and about 15.3 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 23% of the time in July, and the air most often feels muggy.

Daylight stretches from about 15 h 42 min at the start of July to 14 h 48 min by month's end. Set against the rest of the year, July is Hainan's 12th-clearest and 11th-windiest month. For the whole year in context, see Hainan's year-round climate.

Daytime high
27°
1st warmest
Overnight low
18°
12th coldest
Rainfall
162 mm
14.7 wet days
Daylight
15 h 24 min
3:57 AM – 7:19 PM
Cloud cover
66%
12th clearest
Wind
10 km/h
11th windiest
Solar energy
5.13 kWh/m²
Travel score
5.8
out of 10
Air quality
Elevated
PM2.5 25 µg/m³ · 2018

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 27°C through the month.

A typical July day in Hainan reaches about 27°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, July runs about 2°C warmer than June and about 2°C warmer than August.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12617
22717
32718
42718
52718
62718
72718
82718
92718
102718
112718
122718
132718
142718
152718
162718
172718
182718
192718
202718
212718
222718
232718
242718
252718
262718
272618
282618
292618
302618
312618

How July really feels in Hainan

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

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Hainan weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-15° / -26°41.11.68.70.0
Feb-9° / -22°61.61.9100.0
Mar / -11°163.63.311.60.1
Apr12° / 335.61.213.33.2
May20° / 629.90.114.86.2
Jun25° / 15°10113.3015.66.1
Jul27° / 18°16214.7015.35.8
Aug25° / 16°14313.60146.2
Sep20° / 739.1012.46.4
Oct10° / -0°376.90.910.62.7
Nov-3° / -12°143.22.99.10.0
Dec-13° / -23°82.63.48.30.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in July, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of July, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33961
43862
53862
63961
73961
83961
94060
103961
113961
123961
133961
143763
153862
163862
173862
183862
193862
203862
213862
223862
233862
243862
253862
263862
273862
283862
293862
303862
313862

Chance of precipitation in July

Any precipitation

Hainan gets around 162 mm of rain over 14.7 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 47% and peaks near 48% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
148
248
348
448
548
647
747
846
946
1045
1145
1245
1345
1445
1545
1645
1745
1845
1945
2046
2146
2247
2347
2448
2548
2648
2748
2848
2948
3048
3148

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the muggy band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11124392420
2923402620
3822402820
4721403030
5620403230
6519403330
7418403540
8317393650
9217393750
10216383860
11215373970
12215363980
13214354090
142133440100
152133241110
162123141121
173123041131
183122941141
193122841151
203122842151
213112742151
223112743151
233112743151
243112743151
253102743151
263112843141
273112843141
283112943131
293112943131
302123043120
312123043120

Wind in July

Winds average 10 km/h in July.

Across July, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 42 min at the start of July to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over July. Sunrise moves from 3:45 AM to 4:13 AM, and sunset from 7:26 PM to 7:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.73:457:26
215.73:467:26
315.73:467:25
415.63:477:25
515.63:477:25
615.63:487:24
715.63:497:24
815.63:507:24
915.53:507:23
1015.53:517:23
1115.53:527:22
1215.53:537:22
1315.53:547:21
1415.43:557:20
1515.43:567:20
1615.43:577:19
1715.33:587:18
1815.33:597:17
1915.34:007:16
2015.24:017:15
2115.24:027:14
2215.24:037:13
2315.14:047:12
2415.14:057:11
2515.14:067:10
2615.04:077:09
2715.04:097:08
2814.94:107:07
2914.94:117:05
3014.94:127:04
3114.84:137:03

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.13 kWh/m².

For context, solar energy here swings from a low near 1.53 kWh/m² to a high of 5.78 kWh/m² in May across the year — July's 5.13 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.2Bright
185.1Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.7Bright
Planning a trip in July

Hazard calendar for Hainan

In seasonPeak

In July, Hainan sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Hainan's rainy season runs June–September, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Hainan?

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

5.8
Sightseeing
5th-best month of the year
5.8
Beach & pool
1st-best month of the year

July is a reasonable time to visit Hainan for sightseeing.

What to pack for Hainan in July

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

In July, Hainan sees daytime highs around 27°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

UV index in Hainan in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hainan peaks around August 17 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighModerateLowAug 17UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5High
Jun6High
Jul5Moderate
Aug7Very high
Sep5Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Hainan 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 Hainan is worst in March — around 37 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (August, 16 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Hainan's WHO annual average of 25 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateMar 1636 µg/m³Aug 2016 µg/m³
PM2.5 (µg/m³)Level
Jan31Moderate
Feb31Moderate
Mar37Poor
Apr30Moderate
May21Moderate
Jun19Moderate
Jul20Moderate
Aug16Moderate
Sep17Moderate
Oct22Moderate
Nov28Moderate
Dec27Moderate
Location & terrain

Where is Hainan?

Hainan sits at 47.2°N, 127.0°E, 0 m above sea level, in China. The nearest listed city is Harbin, 167 km away.

RaychikhinskBlagoveshchenskChigiriBelogorskSvobodnyyBirobidzhanNamyang-nodongjagu

Topography around Hainan

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

Within 3 km, the terrain around Hainan has only modest variations in elevation — a maximum elevation change of 73 m around an average of 214 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 91 m; within 80 km, significant variations in elevation — a maximum elevation change of 538 m.

The land around Hainan is covered by cropland (87%) within 3 km, cropland (89%) within 16 km, and cropland (82%) within 80 km.

3 km
73 m
16 km
91 m
80 km
538 m
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Harbin 167 km · Raychikhinsk 336 km · Blagoveshchensk 341 km · Chigiri 347 km · Belogorsk 424 km · Svobodnyy 468 km · Birobidzhan 475 km · Namyang-nodongjagu 526 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 Hainan (47.2322°, 126.9809°, elevation 0 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. 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).