Hainan weather in August
In August, Hainan sees average daytime highs of 25°C and overnight lows near 16°C, with 143 mm of rain across 13.6 wet days and about 14 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.
Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 28% of the time in August, and the air most often feels humid.
Daylight stretches from about 14 h 48 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Hainan's 9th-clearest and 10th-windiest month. For the whole year in context, see Hainan's year-round climate.
- Daytime high
- 25°
- 3rd warmest
- Overnight low
- 16°
- 11th coldest
- Rainfall
- 143 mm
- 13.6 wet days
- Daylight
- 14 h 06 min
- 4:34 AM – 6:38 PM
- Cloud cover
- 62%
- 9th clearest
- Wind
- 10 km/h
- 10th windiest
- Solar energy
- 4.6 kWh/m²
- Travel score
- 6.2
- 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 August
Highs ease over the month, from about 26°C in the first days to 23°C by the end.
A typical August day in Hainan reaches about 25°C in the afternoon and slips back to 16°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 28°C. Set against its neighbours, August runs about 2°C cooler than July and about 5°C warmer than September.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 26 | 18 |
| 2 | 26 | 18 |
| 3 | 26 | 18 |
| 4 | 26 | 18 |
| 5 | 26 | 17 |
| 6 | 26 | 17 |
| 7 | 26 | 17 |
| 8 | 26 | 17 |
| 9 | 26 | 17 |
| 10 | 26 | 17 |
| 11 | 25 | 17 |
| 12 | 25 | 17 |
| 13 | 25 | 16 |
| 14 | 25 | 16 |
| 15 | 25 | 16 |
| 16 | 25 | 16 |
| 17 | 25 | 16 |
| 18 | 25 | 15 |
| 19 | 25 | 15 |
| 20 | 25 | 15 |
| 21 | 24 | 15 |
| 22 | 24 | 15 |
| 23 | 24 | 15 |
| 24 | 24 | 14 |
| 25 | 24 | 14 |
| 26 | 24 | 14 |
| 27 | 24 | 14 |
| 28 | 23 | 13 |
| 29 | 23 | 13 |
| 30 | 23 | 13 |
| 31 | 23 | 13 |
How August really feels in Hainan
Once humidity and wind are folded in, August 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.
August 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 August compares with the rest of the year at a glance. August is the 3rd-warmest and 2nd-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 August
The sky is clear or mostly clear about 28% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 56%. 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 38 | 37 | 37 | 37 | 37 | 37 | 37 | 38 | 39 | 40 | 40 | 41 | 42 | 43 | 44 | 44 | 46 | 46 | 46 | 48 | 48 | 48 | 48 | 48 | 48 | 49 | 49 | 50 | 50 | 50 | 51 |
| Cloudier (%) | 62 | 63 | 63 | 63 | 63 | 63 | 63 | 62 | 61 | 60 | 60 | 59 | 58 | 57 | 56 | 56 | 54 | 54 | 54 | 52 | 52 | 52 | 52 | 52 | 52 | 51 | 51 | 50 | 50 | 50 | 49 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 38 | 62 |
| 2 | 37 | 63 |
| 3 | 37 | 63 |
| 4 | 37 | 63 |
| 5 | 37 | 63 |
| 6 | 37 | 63 |
| 7 | 37 | 63 |
| 8 | 38 | 62 |
| 9 | 39 | 61 |
| 10 | 40 | 60 |
| 11 | 40 | 60 |
| 12 | 41 | 59 |
| 13 | 42 | 58 |
| 14 | 43 | 57 |
| 15 | 44 | 56 |
| 16 | 44 | 56 |
| 17 | 46 | 54 |
| 18 | 46 | 54 |
| 19 | 46 | 54 |
| 20 | 48 | 52 |
| 21 | 48 | 52 |
| 22 | 48 | 52 |
| 23 | 48 | 52 |
| 24 | 48 | 52 |
| 25 | 48 | 52 |
| 26 | 49 | 51 |
| 27 | 49 | 51 |
| 28 | 50 | 50 |
| 29 | 50 | 50 |
| 30 | 50 | 50 |
| 31 | 51 | 49 |
Chance of precipitation in August
Hainan gets around 143 mm of rain over 13.6 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 44% and peaks near 49% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 48 | 49 | 49 | 49 | 49 | 48 | 48 | 48 | 47 | 47 | 46 | 46 | 45 | 45 | 44 | 44 | 43 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 40 |
| Rain chance (%) | |
|---|---|
| 1 | 48 |
| 2 | 49 |
| 3 | 49 |
| 4 | 49 |
| 5 | 49 |
| 6 | 48 |
| 7 | 48 |
| 8 | 48 |
| 9 | 47 |
| 10 | 47 |
| 11 | 46 |
| 12 | 46 |
| 13 | 45 |
| 14 | 45 |
| 15 | 44 |
| 16 | 44 |
| 17 | 43 |
| 18 | 42 |
| 19 | 42 |
| 20 | 42 |
| 21 | 41 |
| 22 | 41 |
| 23 | 41 |
| 24 | 41 |
| 25 | 41 |
| 26 | 41 |
| 27 | 41 |
| 28 | 41 |
| 29 | 41 |
| 30 | 41 |
| 31 | 40 |
Humidity in August
Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the humid band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 4 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 13 | 14 | 15 | 17 | 18 | 20 | 22 | 24 | 26 | 29 | 31 | 34 | 37 | 40 |
| Comfortable (%) | 13 | 13 | 14 | 14 | 15 | 15 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 26 | 27 | 28 | 28 | 29 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 26 |
| Humid (%) | 31 | 31 | 32 | 32 | 32 | 33 | 33 | 34 | 34 | 35 | 35 | 35 | 35 | 36 | 37 | 37 | 38 | 38 | 39 | 39 | 39 | 39 | 38 | 38 | 37 | 36 | 35 | 34 | 32 | 30 | 28 |
| Muggy (%) | 43 | 42 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 34 | 33 | 31 | 30 | 28 | 26 | 24 | 22 | 20 | 18 | 17 | 15 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 7 | 6 | 6 |
| Oppressive (%) | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 7 | 6 | 5 | 5 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 2 | 13 | 31 | 43 | 12 |
| 2 | 2 | 13 | 31 | 42 | 11 |
| 3 | 2 | 14 | 32 | 42 | 11 |
| 4 | 2 | 14 | 32 | 41 | 11 |
| 5 | 2 | 15 | 32 | 40 | 10 |
| 6 | 2 | 15 | 33 | 39 | 10 |
| 7 | 3 | 15 | 33 | 38 | 10 |
| 8 | 3 | 16 | 34 | 37 | 10 |
| 9 | 4 | 17 | 34 | 36 | 9 |
| 10 | 5 | 18 | 35 | 34 | 9 |
| 11 | 5 | 19 | 35 | 33 | 8 |
| 12 | 6 | 20 | 35 | 31 | 8 |
| 13 | 7 | 21 | 35 | 30 | 7 |
| 14 | 8 | 22 | 36 | 28 | 6 |
| 15 | 9 | 23 | 37 | 26 | 5 |
| 16 | 10 | 24 | 37 | 24 | 5 |
| 17 | 11 | 25 | 38 | 22 | 4 |
| 18 | 13 | 26 | 38 | 20 | 3 |
| 19 | 14 | 26 | 39 | 18 | 3 |
| 20 | 15 | 27 | 39 | 17 | 2 |
| 21 | 17 | 28 | 39 | 15 | 1 |
| 22 | 18 | 28 | 39 | 13 | 1 |
| 23 | 20 | 29 | 38 | 12 | 1 |
| 24 | 22 | 29 | 38 | 11 | 0 |
| 25 | 24 | 29 | 37 | 10 | 0 |
| 26 | 26 | 29 | 36 | 9 | 0 |
| 27 | 29 | 28 | 35 | 8 | 0 |
| 28 | 31 | 28 | 34 | 7 | 0 |
| 29 | 34 | 27 | 32 | 7 | 0 |
| 30 | 37 | 27 | 30 | 6 | 0 |
| 31 | 40 | 26 | 28 | 6 | 0 |
Wind in August
Winds average 10 km/h in August.
Across August, daily wind ranges from about 10 km/h on the calmest days to 11 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 |
| 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 | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 10 | calm |
| 2 | 10 | calm |
| 3 | 10 | calm |
| 4 | 10 | calm |
| 5 | 10 | calm |
| 6 | 10 | calm |
| 7 | 10 | calm |
| 8 | 10 | calm |
| 9 | 10 | calm |
| 10 | 10 | calm |
| 11 | 10 | calm |
| 12 | 10 | calm |
| 13 | 10 | calm |
| 14 | 10 | calm |
| 15 | 10 | calm |
| 16 | 10 | calm |
| 17 | 10 | calm |
| 18 | 10 | calm |
| 19 | 10 | calm |
| 20 | 10 | calm |
| 21 | 10 | calm |
| 22 | 10 | calm |
| 23 | 10 | calm |
| 24 | 10 | calm |
| 25 | 10 | calm |
| 26 | 10 | calm |
| 27 | 10 | calm |
| 28 | 10 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
| 31 | 11 | calm |
Sunrise & sunset in August
Daylight runs from about 14 h 48 min at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 90 minutes over August. Sunrise moves from 4:15 AM to 4:55 AM, and sunset from 7:02 PM to 6:10 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.8 | 14.7 | 14.7 | 14.6 | 14.6 | 14.6 | 14.5 | 14.5 | 14.4 | 14.4 | 14.3 | 14.3 | 14.2 | 14.2 | 14.1 | 14.1 | 14.0 | 14.0 | 13.9 | 13.9 | 13.8 | 13.7 | 13.7 | 13.6 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.3 | 13.3 |
| Sunrise (AM) | 4:15 | 4:16 | 4:17 | 4:18 | 4:20 | 4:21 | 4:22 | 4:24 | 4:25 | 4:26 | 4:28 | 4:29 | 4:30 | 4:32 | 4:33 | 4:34 | 4:36 | 4:37 | 4:38 | 4:40 | 4:41 | 4:42 | 4:44 | 4:45 | 4:46 | 4:48 | 4:49 | 4:51 | 4:52 | 4:53 | 4:55 |
| Sunset (PM) | 7:02 | 7:00 | 6:59 | 6:57 | 6:56 | 6:54 | 6:53 | 6:51 | 6:50 | 6:48 | 6:47 | 6:45 | 6:43 | 6:42 | 6:40 | 6:38 | 6:36 | 6:34 | 6:33 | 6:31 | 6:29 | 6:27 | 6:25 | 6:23 | 6:21 | 6:20 | 6:18 | 6:16 | 6:14 | 6:12 | 6:10 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.8 | 4:15 | 7:02 |
| 2 | 14.7 | 4:16 | 7:00 |
| 3 | 14.7 | 4:17 | 6:59 |
| 4 | 14.6 | 4:18 | 6:57 |
| 5 | 14.6 | 4:20 | 6:56 |
| 6 | 14.6 | 4:21 | 6:54 |
| 7 | 14.5 | 4:22 | 6:53 |
| 8 | 14.5 | 4:24 | 6:51 |
| 9 | 14.4 | 4:25 | 6:50 |
| 10 | 14.4 | 4:26 | 6:48 |
| 11 | 14.3 | 4:28 | 6:47 |
| 12 | 14.3 | 4:29 | 6:45 |
| 13 | 14.2 | 4:30 | 6:43 |
| 14 | 14.2 | 4:32 | 6:42 |
| 15 | 14.1 | 4:33 | 6:40 |
| 16 | 14.1 | 4:34 | 6:38 |
| 17 | 14.0 | 4:36 | 6:36 |
| 18 | 14.0 | 4:37 | 6:34 |
| 19 | 13.9 | 4:38 | 6:33 |
| 20 | 13.9 | 4:40 | 6:31 |
| 21 | 13.8 | 4:41 | 6:29 |
| 22 | 13.7 | 4:42 | 6:27 |
| 23 | 13.7 | 4:44 | 6:25 |
| 24 | 13.6 | 4:45 | 6:23 |
| 25 | 13.6 | 4:46 | 6:21 |
| 26 | 13.5 | 4:48 | 6:20 |
| 27 | 13.5 | 4:49 | 6:18 |
| 28 | 13.4 | 4:51 | 6:16 |
| 29 | 13.4 | 4:52 | 6:14 |
| 30 | 13.3 | 4:53 | 6:12 |
| 31 | 13.3 | 4:55 | 6:10 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 4.6 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 — August's 4.6 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.4 | 4.4 | 4.4 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.7 | Bright |
| 2 | 4.7 | Bright |
| 3 | 4.7 | Bright |
| 4 | 4.7 | Bright |
| 5 | 4.7 | Bright |
| 6 | 4.7 | Bright |
| 7 | 4.6 | Bright |
| 8 | 4.6 | Bright |
| 9 | 4.6 | Bright |
| 10 | 4.6 | Bright |
| 11 | 4.6 | Bright |
| 12 | 4.6 | Bright |
| 13 | 4.7 | Bright |
| 14 | 4.7 | Bright |
| 15 | 4.7 | Bright |
| 16 | 4.7 | Bright |
| 17 | 4.6 | Bright |
| 18 | 4.6 | Bright |
| 19 | 4.6 | Bright |
| 20 | 4.6 | Bright |
| 21 | 4.6 | Bright |
| 22 | 4.6 | Bright |
| 23 | 4.6 | Bright |
| 24 | 4.5 | Bright |
| 25 | 4.5 | Bright |
| 26 | 4.5 | Bright |
| 27 | 4.5 | Bright |
| 28 | 4.5 | Bright |
| 29 | 4.4 | Bright |
| 30 | 4.4 | Bright |
| 31 | 4.4 | Bright |
Hazard calendar for Hainan
In August, 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 August a good time to visit Hainan?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Hainan for sightseeing.
What to pack for Hainan in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Hainan sees daytime highs around 25°C and nights near 16°C. Worth packing: light clothes, rain gear and sun protection. About 14 days see rain.
UV index in Hainan in August
Clear-sky midday UV in August peaks around 7 — 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 August
Average fine-particle pollution (PM2.5) through the year — so you can see where August 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).