Hainan weather in October

In October, Hainan sees average daytime highs of 10°C and overnight lows near -0°C, with 37 mm of precipitation across 6.9 wet days and about 10.6 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 15°C in the first days to 5°C by the end. The sky is clear or mostly clear about 47% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of October to 9 h 48 min by month's end. Set against the rest of the year, October is Hainan's 4th-clearest and 3rd-windiest month. For the whole year in context, see Hainan's year-round climate.

Daytime high
10°
7th warmest
Overnight low
-0°
6th coldest
Precipitation
37 mm
6.9 wet days
Daylight
10 h 36 min
5:59 AM – 4:35 PM
Cloud cover
47%
4th clearest
Wind
12 km/h
3rd windiest
Solar energy
2.86 kWh/m²
Travel score
2.7
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 October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 15°C in the first days to 5°C by the end.

A typical October day in Hainan reaches about 10°C in the afternoon and slips back to -0°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 17°C. Set against its neighbours, October runs about 9°C cooler than September and about 13°C warmer than November.

-10°10°20°151015202531
Avg high (°C)Avg low (°C)
1164
2154
3154
4153
5143
6143
7142
8132
9132
10132
11121
12121
13121
14110
15110
16100
1710-1
1810-1
199-1
209-2
219-2
228-2
238-2
247-3
257-3
267-3
276-4
286-4
295-4
305-5
315-5

How October really feels in Hainan

Once humidity and wind are folded in, October averages 0 days that feel above 32°C and 27 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
27
1 feel bitter (≤ -10°C)

The story in October is cold — wind chill drags the overnight "feels like" below the raw low.

Hainan weather by month

How October compares with the rest of the year at a glance. October is the 7th-warmest and 6th-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 October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25842
35842
45842
55941
65941
75941
85941
96040
106040
116139
126139
136238
146238
156238
166238
176238
186238
196139
206139
216040
226040
236040
246040
256040
266040
276040
286040
296040
306040
316040

Chance of precipitation in October

Any precipitationSnow

Hainan gets around 37 mm of rain and snow over 6.9 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 21% and peaks near 28% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1281
2281
3271
4271
5271
6261
7261
8261
9251
10251
11242
12232
13232
14222
15222
16222
17212
18213
19203
20203
21194
22194
23184
24185
25175
26175
27166
28156
29156
30147
31147

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1982
2982
3991
4991
5991
6991
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in October

Winds average 12 km/h in October.

Across October, daily wind ranges from about 12 km/h on the calmest days to 12 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
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
3112light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 30 min at the start of October to 9 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over October. Sunrise moves from 5:37 AM to 6:21 AM, and sunset from 5:05 PM to 4:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.55:375:05
211.45:395:03
311.35:405:01
411.35:414:59
511.25:434:57
611.25:444:55
711.15:464:53
811.15:474:51
911.05:494:49
1010.95:504:47
1110.95:514:45
1210.85:534:43
1310.85:544:41
1410.75:564:39
1510.75:574:37
1610.65:594:35
1710.66:004:34
1810.56:024:32
1910.46:034:30
2010.46:054:28
2110.36:064:26
2210.36:084:25
2310.26:094:23
2410.26:114:21
2510.16:124:19
2610.16:144:18
2710.06:154:16
2810.06:174:15
299.96:184:13
309.96:204:11
319.86:214:10

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.86 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 — October's 2.86 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.4Moderate
23.4Moderate
33.4Moderate
43.3Moderate
53.3Moderate
63.3Moderate
73.2Moderate
83.2Moderate
93.1Moderate
103.1Moderate
113.1Moderate
123.0Moderate
133.0Moderate
143.0Moderate
152.9Moderate
162.9Moderate
172.9Moderate
182.8Moderate
192.8Moderate
202.7Moderate
212.7Moderate
222.7Moderate
232.6Moderate
242.6Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.4Moderate
302.4Moderate
312.4Moderate
Planning a trip in October

Hazard calendar for Hainan

In seasonPeak

None of Hainan's seasonal hazards are active in October. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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 October a good time to visit Hainan?

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

2.7
Sightseeing
7th-best month of the year
0.1
Beach & pool
7th-best month of the year

October is a weaker month for outdoor sightseeing in Hainan.

What to pack for Hainan in October

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

In October, Hainan sees daytime highs around 10°C and nights near -0°C. Pack a warm layer. About 7 days see rain.

a warm layer

UV index in Hainan in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 2. 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 October

GoodModeratePoorUnhealthyVery unhealthy

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