Hainan weather in September
In September, Hainan sees average daytime highs of 20°C and overnight lows near 8°C, with 73 mm of rain across 9.1 wet days and about 12.4 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.
Highs ease over the month, from about 22°C in the first days to 17°C by the end. The sky is clear or mostly clear about 40% of the time in September, and the air most often feels dry.
Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Hainan's 6th-clearest and 6th-windiest month. For the whole year in context, see Hainan's year-round climate.
- Daytime high
- 20°
- 5th warmest
- Overnight low
- 8°
- 9th coldest
- Rainfall
- 73 mm
- 9.1 wet days
- Daylight
- 12 h 18 min
- 5:16 AM – 5:36 PM
- Cloud cover
- 51%
- 6th clearest
- Wind
- 11 km/h
- 6th windiest
- Solar energy
- 4.05 kWh/m²
- Travel score
- 6.4
- 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 September
Highs ease over the month, from about 22°C in the first days to 17°C by the end.
A typical September day in Hainan reaches about 20°C in the afternoon and slips back to 8°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 25°C. Set against its neighbours, September runs about 5°C cooler than August and about 9°C warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 |
| Avg low (°C) | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 4 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 23 | 12 |
| 2 | 22 | 12 |
| 3 | 22 | 12 |
| 4 | 22 | 12 |
| 5 | 22 | 11 |
| 6 | 22 | 11 |
| 7 | 21 | 11 |
| 8 | 21 | 10 |
| 9 | 21 | 10 |
| 10 | 21 | 10 |
| 11 | 21 | 10 |
| 12 | 20 | 9 |
| 13 | 20 | 9 |
| 14 | 20 | 9 |
| 15 | 20 | 8 |
| 16 | 20 | 8 |
| 17 | 19 | 8 |
| 18 | 19 | 8 |
| 19 | 19 | 7 |
| 20 | 19 | 7 |
| 21 | 19 | 7 |
| 22 | 18 | 7 |
| 23 | 18 | 6 |
| 24 | 18 | 6 |
| 25 | 18 | 6 |
| 26 | 17 | 6 |
| 27 | 17 | 5 |
| 28 | 17 | 5 |
| 29 | 16 | 5 |
| 30 | 16 | 4 |
How September really feels in Hainan
Once humidity and wind are folded in, September 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.
September 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 September compares with the rest of the year at a glance. September is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -15° / -26° | 4 | 1.1 | 1.6 | 8.7 | 0.0 |
| Feb | -9° / -22° | 6 | 1.6 | 1.9 | 10 | 0.0 |
| Mar | 1° / -11° | 16 | 3.6 | 3.3 | 11.6 | 0.1 |
| Apr | 12° / 0° | 33 | 5.6 | 1.2 | 13.3 | 3.2 |
| May | 20° / 8° | 62 | 9.9 | 0.1 | 14.8 | 6.2 |
| Jun | 25° / 15° | 101 | 13.3 | 0 | 15.6 | 6.1 |
| Jul | 27° / 18° | 162 | 14.7 | 0 | 15.3 | 5.8 |
| Aug | 25° / 16° | 143 | 13.6 | 0 | 14 | 6.2 |
| Sep | 20° / 8° | 73 | 9.1 | 0 | 12.4 | 6.4 |
| Oct | 10° / -0° | 37 | 6.9 | 0.9 | 10.6 | 2.7 |
| Nov | -3° / -12° | 14 | 3.2 | 2.9 | 9.1 | 0.0 |
| Dec | -13° / -23° | 8 | 2.6 | 3.4 | 8.3 | 0.0 |
Cloud cover in September
The sky is clear or mostly clear about 40% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 51 | 52 | 52 | 53 | 54 | 54 | 55 | 56 | 56 | 57 | 57 | 58 | 58 | 59 | 59 | 59 | 59 | 59 | 59 | 60 | 60 | 60 | 59 | 59 | 59 | 58 | 58 | 57 | 57 | 57 |
| Cloudier (%) | 49 | 48 | 48 | 47 | 46 | 46 | 45 | 44 | 44 | 43 | 43 | 42 | 42 | 41 | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 43 | 43 | 43 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 51 | 49 |
| 2 | 52 | 48 |
| 3 | 52 | 48 |
| 4 | 53 | 47 |
| 5 | 54 | 46 |
| 6 | 54 | 46 |
| 7 | 55 | 45 |
| 8 | 56 | 44 |
| 9 | 56 | 44 |
| 10 | 57 | 43 |
| 11 | 57 | 43 |
| 12 | 58 | 42 |
| 13 | 58 | 42 |
| 14 | 59 | 41 |
| 15 | 59 | 41 |
| 16 | 59 | 41 |
| 17 | 59 | 41 |
| 18 | 59 | 41 |
| 19 | 59 | 41 |
| 20 | 60 | 40 |
| 21 | 60 | 40 |
| 22 | 60 | 40 |
| 23 | 59 | 41 |
| 24 | 59 | 41 |
| 25 | 59 | 41 |
| 26 | 58 | 42 |
| 27 | 58 | 42 |
| 28 | 57 | 43 |
| 29 | 57 | 43 |
| 30 | 57 | 43 |
Chance of precipitation in September
Hainan gets around 73 mm of rain over 9.1 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 31% and peaks near 40% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 40 | 40 | 39 | 38 | 37 | 37 | 36 | 35 | 34 | 33 | 32 | 31 | 30 | 29 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 |
| Rain chance (%) | |
|---|---|
| 1 | 40 |
| 2 | 40 |
| 3 | 39 |
| 4 | 38 |
| 5 | 37 |
| 6 | 37 |
| 7 | 36 |
| 8 | 35 |
| 9 | 34 |
| 10 | 33 |
| 11 | 32 |
| 12 | 31 |
| 13 | 30 |
| 14 | 29 |
| 15 | 28 |
| 16 | 28 |
| 17 | 27 |
| 18 | 27 |
| 19 | 27 |
| 20 | 27 |
| 21 | 27 |
| 22 | 27 |
| 23 | 27 |
| 24 | 27 |
| 25 | 27 |
| 26 | 28 |
| 27 | 28 |
| 28 | 28 |
| 29 | 28 |
| 30 | 28 |
Humidity in September
Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the dry band about 80% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 44 | 47 | 51 | 55 | 58 | 61 | 64 | 68 | 71 | 74 | 77 | 79 | 81 | 84 | 85 | 87 | 88 | 89 | 90 | 91 | 93 | 94 | 95 | 95 | 96 | 96 | 97 | 97 | 98 | 98 |
| Comfortable (%) | 25 | 25 | 24 | 23 | 22 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 |
| Humid (%) | 26 | 23 | 21 | 18 | 16 | 14 | 12 | 10 | 8 | 7 | 5 | 4 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Muggy (%) | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 44 | 25 | 26 | 5 |
| 2 | 47 | 25 | 23 | 5 |
| 3 | 51 | 24 | 21 | 4 |
| 4 | 55 | 23 | 18 | 4 |
| 5 | 58 | 22 | 16 | 4 |
| 6 | 61 | 22 | 14 | 3 |
| 7 | 64 | 21 | 12 | 3 |
| 8 | 68 | 20 | 10 | 2 |
| 9 | 71 | 19 | 8 | 2 |
| 10 | 74 | 18 | 7 | 1 |
| 11 | 77 | 17 | 5 | 1 |
| 12 | 79 | 16 | 4 | 1 |
| 13 | 81 | 15 | 3 | 1 |
| 14 | 84 | 14 | 2 | 0 |
| 15 | 85 | 13 | 2 | 0 |
| 16 | 87 | 12 | 1 | 0 |
| 17 | 88 | 11 | 1 | 0 |
| 18 | 89 | 10 | 1 | 0 |
| 19 | 90 | 9 | 1 | 0 |
| 20 | 91 | 8 | 1 | 0 |
| 21 | 93 | 7 | 0 | 0 |
| 22 | 94 | 6 | 0 | 0 |
| 23 | 95 | 5 | 0 | 0 |
| 24 | 95 | 5 | 0 | 0 |
| 25 | 96 | 4 | 0 | 0 |
| 26 | 96 | 4 | 0 | 0 |
| 27 | 97 | 3 | 0 | 0 |
| 28 | 97 | 3 | 0 | 0 |
| 29 | 98 | 2 | 0 | 0 |
| 30 | 98 | 2 | 0 | 0 |
Wind in September
Winds average 11 km/h in September.
Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 11 | calm |
| 2 | 11 | calm |
| 3 | 11 | calm |
| 4 | 11 | calm |
| 5 | 11 | calm |
| 6 | 11 | calm |
| 7 | 11 | calm |
| 8 | 11 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 12 | calm |
| 15 | 12 | calm |
| 16 | 12 | calm |
| 17 | 12 | calm |
| 18 | 12 | calm |
| 19 | 12 | calm |
| 20 | 12 | calm |
| 21 | 12 | calm |
| 22 | 12 | calm |
| 23 | 12 | calm |
| 24 | 12 | calm |
| 25 | 12 | calm |
| 26 | 12 | calm |
| 27 | 12 | calm |
| 28 | 12 | calm |
| 29 | 12 | calm |
| 30 | 12 | light breeze |
Sunrise & sunset in September
Daylight runs from about 13 h 12 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 102 minutes over September. Sunrise moves from 4:56 AM to 5:36 AM, and sunset from 6:08 PM to 5:07 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.2 | 13.1 | 13.1 | 13.0 | 13.0 | 12.9 | 12.9 | 12.8 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.8 | 11.8 | 11.7 | 11.6 | 11.6 | 11.5 |
| Sunrise (AM) | 4:56 | 4:57 | 4:59 | 5:00 | 5:01 | 5:03 | 5:04 | 5:05 | 5:07 | 5:08 | 5:10 | 5:11 | 5:12 | 5:14 | 5:15 | 5:16 | 5:18 | 5:19 | 5:20 | 5:22 | 5:23 | 5:25 | 5:26 | 5:27 | 5:29 | 5:30 | 5:32 | 5:33 | 5:34 | 5:36 |
| Sunset (PM) | 6:08 | 6:06 | 6:04 | 6:02 | 5:59 | 5:57 | 5:55 | 5:53 | 5:51 | 5:49 | 5:47 | 5:45 | 5:43 | 5:41 | 5:39 | 5:36 | 5:34 | 5:32 | 5:30 | 5:28 | 5:26 | 5:24 | 5:22 | 5:20 | 5:17 | 5:15 | 5:13 | 5:11 | 5:09 | 5:07 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.2 | 4:56 | 6:08 |
| 2 | 13.1 | 4:57 | 6:06 |
| 3 | 13.1 | 4:59 | 6:04 |
| 4 | 13.0 | 5:00 | 6:02 |
| 5 | 13.0 | 5:01 | 5:59 |
| 6 | 12.9 | 5:03 | 5:57 |
| 7 | 12.9 | 5:04 | 5:55 |
| 8 | 12.8 | 5:05 | 5:53 |
| 9 | 12.7 | 5:07 | 5:51 |
| 10 | 12.7 | 5:08 | 5:49 |
| 11 | 12.6 | 5:10 | 5:47 |
| 12 | 12.6 | 5:11 | 5:45 |
| 13 | 12.5 | 5:12 | 5:43 |
| 14 | 12.5 | 5:14 | 5:41 |
| 15 | 12.4 | 5:15 | 5:39 |
| 16 | 12.3 | 5:16 | 5:36 |
| 17 | 12.3 | 5:18 | 5:34 |
| 18 | 12.2 | 5:19 | 5:32 |
| 19 | 12.2 | 5:20 | 5:30 |
| 20 | 12.1 | 5:22 | 5:28 |
| 21 | 12.0 | 5:23 | 5:26 |
| 22 | 12.0 | 5:25 | 5:24 |
| 23 | 11.9 | 5:26 | 5:22 |
| 24 | 11.9 | 5:27 | 5:20 |
| 25 | 11.8 | 5:29 | 5:17 |
| 26 | 11.8 | 5:30 | 5:15 |
| 27 | 11.7 | 5:32 | 5:13 |
| 28 | 11.6 | 5:33 | 5:11 |
| 29 | 11.6 | 5:34 | 5:09 |
| 30 | 11.5 | 5:36 | 5:07 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.05 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 — September's 4.05 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.1 | 4.1 | 4.1 | 4.0 | 4.0 | 4.0 | 3.9 | 3.9 | 3.8 | 3.8 | 3.8 | 3.7 | 3.7 | 3.6 | 3.6 | 3.5 | 3.5 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.4 | Bright |
| 2 | 4.4 | Bright |
| 3 | 4.3 | Bright |
| 4 | 4.3 | Bright |
| 5 | 4.3 | Bright |
| 6 | 4.3 | Bright |
| 7 | 4.3 | Bright |
| 8 | 4.3 | Bright |
| 9 | 4.2 | Bright |
| 10 | 4.2 | Bright |
| 11 | 4.2 | Bright |
| 12 | 4.2 | Bright |
| 13 | 4.2 | Bright |
| 14 | 4.1 | Bright |
| 15 | 4.1 | Bright |
| 16 | 4.1 | Bright |
| 17 | 4.0 | Bright |
| 18 | 4.0 | Bright |
| 19 | 4.0 | Moderate |
| 20 | 3.9 | Moderate |
| 21 | 3.9 | Moderate |
| 22 | 3.8 | Moderate |
| 23 | 3.8 | Moderate |
| 24 | 3.8 | Moderate |
| 25 | 3.7 | Moderate |
| 26 | 3.7 | Moderate |
| 27 | 3.6 | Moderate |
| 28 | 3.6 | Moderate |
| 29 | 3.5 | Moderate |
| 30 | 3.5 | Moderate |
Hazard calendar for Hainan
In September, 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.
Is September a good time to visit Hainan?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Hainan for sightseeing.
What to pack for Hainan in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Hainan sees daytime highs around 20°C and nights near 8°C. Worth packing: rain gear. About 9 days see rain.
UV index in Hainan in September
Clear-sky midday UV in September 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 3 | 4 | 5 | 6 | 5 | 7 | 5 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | Moderate | Very high | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 3 | Moderate |
| Apr | 4 | Moderate |
| May | 5 | High |
| Jun | 6 | High |
| Jul | 5 | Moderate |
| Aug | 7 | Very high |
| Sep | 5 | Moderate |
| Oct | 2 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Hainan in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 31 | 31 | 37 | 30 | 21 | 19 | 20 | 16 | 17 | 22 | 28 | 27 |
| Level | Moderate | Moderate | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 31 | Moderate |
| Feb | 31 | Moderate |
| Mar | 37 | Poor |
| Apr | 30 | Moderate |
| May | 21 | Moderate |
| Jun | 19 | Moderate |
| Jul | 20 | Moderate |
| Aug | 16 | Moderate |
| Sep | 17 | Moderate |
| Oct | 22 | Moderate |
| Nov | 28 | Moderate |
| Dec | 27 | Moderate |
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.
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.
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
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).