Sanya weather in May
In May, Sanya sees average daytime highs of 29°C and overnight lows near 26°C, with 139 mm of rain across 19 wet days and about 12.8 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.
Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 24% of the time in May, and the air most often feels miserable.
Daylight stretches from about 12 h 42 min at the start of May to 13 hours by month's end. Set against the rest of the year, May is Sanya's 8th-clearest and 12th-windiest month. For the whole year in context, see Sanya's year-round climate.
- Daytime high
- 29°
- 3rd warmest
- Overnight low
- 26°
- 9th coldest
- Rainfall
- 139 mm
- 19 wet days
- Daylight
- 12 h 54 min
- 6:13 AM – 7:04 PM
- Cloud cover
- 68%
- 8th clearest
- Wind
- 11 km/h
- 12th windiest
- Solar energy
- 5.71 kWh/m²
- Travel score
- 4.3
- 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 May
Day-to-day highs hold fairly steady near 29°C through the month.
A typical May day in Sanya reaches about 29°C in the afternoon and slips back to 26°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, May runs about 2°C warmer than April and on par with June.
| 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) | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Avg low (°C) | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 29 | 25 |
| 2 | 29 | 25 |
| 3 | 29 | 25 |
| 4 | 29 | 26 |
| 5 | 29 | 26 |
| 6 | 29 | 26 |
| 7 | 29 | 26 |
| 8 | 29 | 26 |
| 9 | 29 | 26 |
| 10 | 29 | 26 |
| 11 | 29 | 26 |
| 12 | 29 | 26 |
| 13 | 29 | 26 |
| 14 | 29 | 26 |
| 15 | 29 | 26 |
| 16 | 29 | 26 |
| 17 | 29 | 26 |
| 18 | 29 | 26 |
| 19 | 29 | 26 |
| 20 | 29 | 26 |
| 21 | 30 | 26 |
| 22 | 30 | 26 |
| 23 | 30 | 26 |
| 24 | 30 | 26 |
| 25 | 30 | 26 |
| 26 | 30 | 26 |
| 27 | 30 | 26 |
| 28 | 30 | 26 |
| 29 | 30 | 26 |
| 30 | 30 | 26 |
| 31 | 30 | 27 |
How May really feels in Sanya
Once humidity and wind are folded in, May averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Sanya weather by month
How May compares with the rest of the year at a glance. May is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 23° / 19° | 12 | 2.3 | 11 | 8.2 |
| Feb | 24° / 19° | 10 | 2.5 | 11.4 | 8.2 |
| Mar | 25° / 22° | 18 | 3.8 | 11.9 | 7.9 |
| Apr | 28° / 24° | 53 | 8.6 | 12.4 | 6.6 |
| May | 29° / 26° | 139 | 19 | 12.8 | 4.3 |
| Jun | 30° / 27° | 212 | 22.2 | 13.1 | 3.4 |
| Jul | 29° / 26° | 280 | 23 | 13 | 3.6 |
| Aug | 29° / 26° | 261 | 24.4 | 12.6 | 3.5 |
| Sep | 29° / 26° | 258 | 22.3 | 12.1 | 3.8 |
| Oct | 28° / 24° | 182 | 14 | 11.6 | 5.7 |
| Nov | 26° / 22° | 54 | 5.6 | 11.1 | 7.5 |
| Dec | 24° / 19° | 26 | 3 | 10.9 | 8.2 |
Cloud cover in May
The sky is clear or mostly clear about 24% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to cloud over 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 (%) | 60 | 59 | 58 | 57 | 57 | 55 | 53 | 52 | 51 | 49 | 47 | 45 | 43 | 40 | 39 | 36 | 33 | 31 | 29 | 26 | 25 | 24 | 22 | 21 | 21 | 20 | 20 | 19 | 19 | 19 | 19 |
| Cloudier (%) | 40 | 41 | 42 | 43 | 43 | 45 | 47 | 48 | 49 | 51 | 53 | 55 | 57 | 60 | 61 | 64 | 67 | 69 | 71 | 74 | 75 | 76 | 78 | 79 | 79 | 80 | 80 | 81 | 81 | 81 | 81 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 60 | 40 |
| 2 | 59 | 41 |
| 3 | 58 | 42 |
| 4 | 57 | 43 |
| 5 | 57 | 43 |
| 6 | 55 | 45 |
| 7 | 53 | 47 |
| 8 | 52 | 48 |
| 9 | 51 | 49 |
| 10 | 49 | 51 |
| 11 | 47 | 53 |
| 12 | 45 | 55 |
| 13 | 43 | 57 |
| 14 | 40 | 60 |
| 15 | 39 | 61 |
| 16 | 36 | 64 |
| 17 | 33 | 67 |
| 18 | 31 | 69 |
| 19 | 29 | 71 |
| 20 | 26 | 74 |
| 21 | 25 | 75 |
| 22 | 24 | 76 |
| 23 | 22 | 78 |
| 24 | 21 | 79 |
| 25 | 21 | 79 |
| 26 | 20 | 80 |
| 27 | 20 | 80 |
| 28 | 19 | 81 |
| 29 | 19 | 81 |
| 30 | 19 | 81 |
| 31 | 19 | 81 |
Chance of precipitation in May
Sanya gets around 139 mm of rain over 19 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 60% and peaks near 73% on the wettest days. The odds climb 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 (%) | 43 | 44 | 46 | 47 | 48 | 50 | 51 | 52 | 53 | 54 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 69 | 70 | 70 | 71 | 72 | 73 | 73 | 73 | 73 |
| Rain chance (%) | |
|---|---|
| 1 | 43 |
| 2 | 44 |
| 3 | 46 |
| 4 | 47 |
| 5 | 48 |
| 6 | 50 |
| 7 | 51 |
| 8 | 52 |
| 9 | 53 |
| 10 | 54 |
| 11 | 56 |
| 12 | 57 |
| 13 | 58 |
| 14 | 59 |
| 15 | 60 |
| 16 | 61 |
| 17 | 62 |
| 18 | 63 |
| 19 | 64 |
| 20 | 65 |
| 21 | 66 |
| 22 | 67 |
| 23 | 69 |
| 24 | 70 |
| 25 | 70 |
| 26 | 71 |
| 27 | 72 |
| 28 | 73 |
| 29 | 73 |
| 30 | 73 |
| 31 | 73 |
Humidity in May
Most of May feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the miserable band about 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Oppressive (%) | 41 | 39 | 37 | 36 | 34 | 32 | 30 | 28 | 27 | 26 | 24 | 23 | 23 | 22 | 21 | 21 | 20 | 19 | 19 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 13 | 13 | 12 | 11 | 10 |
| Miserable (%) | 55 | 57 | 59 | 60 | 62 | 65 | 67 | 69 | 70 | 71 | 73 | 74 | 74 | 75 | 76 | 76 | 77 | 78 | 79 | 80 | 81 | 81 | 83 | 84 | 84 | 85 | 86 | 87 | 88 | 89 | 90 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 4 | 41 | 55 |
| 2 | 4 | 39 | 57 |
| 3 | 4 | 37 | 59 |
| 4 | 4 | 36 | 60 |
| 5 | 4 | 34 | 62 |
| 6 | 3 | 32 | 65 |
| 7 | 3 | 30 | 67 |
| 8 | 3 | 28 | 69 |
| 9 | 3 | 27 | 70 |
| 10 | 3 | 26 | 71 |
| 11 | 3 | 24 | 73 |
| 12 | 3 | 23 | 74 |
| 13 | 3 | 23 | 74 |
| 14 | 3 | 22 | 75 |
| 15 | 3 | 21 | 76 |
| 16 | 3 | 21 | 76 |
| 17 | 3 | 20 | 77 |
| 18 | 3 | 19 | 78 |
| 19 | 2 | 19 | 79 |
| 20 | 2 | 18 | 80 |
| 21 | 2 | 17 | 81 |
| 22 | 2 | 17 | 81 |
| 23 | 1 | 16 | 83 |
| 24 | 1 | 15 | 84 |
| 25 | 1 | 15 | 84 |
| 26 | 1 | 14 | 85 |
| 27 | 1 | 13 | 86 |
| 28 | 0 | 13 | 87 |
| 29 | 0 | 12 | 88 |
| 30 | 0 | 11 | 89 |
| 31 | 0 | 10 | 90 |
Wind in May
Winds average 11 km/h in May, the calmest month.
Across May, daily wind ranges from about 10 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| 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 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 12 | calm |
| 8 | 11 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | 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 | 10 | calm |
| 30 | 10 | calm |
| 31 | 10 | calm |
Sunrise & sunset in May
Daylight runs from about 12 h 42 min at the start of May to 13 hours by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 18 minutes over May. Sunrise moves from 6:20 AM to 6:09 AM, and sunset from 6:59 PM to 7:10 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) | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 |
| Sunrise (AM) | 6:20 | 6:19 | 6:18 | 6:18 | 6:17 | 6:17 | 6:16 | 6:16 | 6:15 | 6:15 | 6:14 | 6:14 | 6:14 | 6:13 | 6:13 | 6:13 | 6:12 | 6:12 | 6:12 | 6:11 | 6:11 | 6:11 | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:09 | 6:09 | 6:09 |
| Sunset (PM) | 6:59 | 6:59 | 6:59 | 7:00 | 7:00 | 7:00 | 7:01 | 7:01 | 7:01 | 7:02 | 7:02 | 7:02 | 7:03 | 7:03 | 7:04 | 7:04 | 7:04 | 7:05 | 7:05 | 7:05 | 7:06 | 7:06 | 7:07 | 7:07 | 7:07 | 7:08 | 7:08 | 7:08 | 7:09 | 7:09 | 7:10 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.7 | 6:20 | 6:59 |
| 2 | 12.7 | 6:19 | 6:59 |
| 3 | 12.7 | 6:18 | 6:59 |
| 4 | 12.7 | 6:18 | 7:00 |
| 5 | 12.7 | 6:17 | 7:00 |
| 6 | 12.7 | 6:17 | 7:00 |
| 7 | 12.7 | 6:16 | 7:01 |
| 8 | 12.8 | 6:16 | 7:01 |
| 9 | 12.8 | 6:15 | 7:01 |
| 10 | 12.8 | 6:15 | 7:02 |
| 11 | 12.8 | 6:14 | 7:02 |
| 12 | 12.8 | 6:14 | 7:02 |
| 13 | 12.8 | 6:14 | 7:03 |
| 14 | 12.8 | 6:13 | 7:03 |
| 15 | 12.8 | 6:13 | 7:04 |
| 16 | 12.9 | 6:13 | 7:04 |
| 17 | 12.9 | 6:12 | 7:04 |
| 18 | 12.9 | 6:12 | 7:05 |
| 19 | 12.9 | 6:12 | 7:05 |
| 20 | 12.9 | 6:11 | 7:05 |
| 21 | 12.9 | 6:11 | 7:06 |
| 22 | 12.9 | 6:11 | 7:06 |
| 23 | 12.9 | 6:10 | 7:07 |
| 24 | 12.9 | 6:10 | 7:07 |
| 25 | 13.0 | 6:10 | 7:07 |
| 26 | 13.0 | 6:10 | 7:08 |
| 27 | 13.0 | 6:10 | 7:08 |
| 28 | 13.0 | 6:10 | 7:08 |
| 29 | 13.0 | 6:09 | 7:09 |
| 30 | 13.0 | 6:09 | 7:09 |
| 31 | 13.0 | 6:09 | 7:10 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 5.71 kWh/m².
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 — May's 5.71 kWh/m² sits near the top of that range.
| 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) | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 |
| 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 | 5.9 | Bright |
| 2 | 5.9 | Bright |
| 3 | 5.9 | Bright |
| 4 | 5.9 | Bright |
| 5 | 5.9 | Bright |
| 6 | 5.8 | Bright |
| 7 | 5.8 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.8 | Bright |
| 12 | 5.8 | Bright |
| 13 | 5.8 | Bright |
| 14 | 5.7 | Bright |
| 15 | 5.7 | Bright |
| 16 | 5.7 | Bright |
| 17 | 5.7 | Bright |
| 18 | 5.7 | Bright |
| 19 | 5.7 | Bright |
| 20 | 5.7 | Bright |
| 21 | 5.6 | Bright |
| 22 | 5.6 | Bright |
| 23 | 5.6 | Bright |
| 24 | 5.6 | Bright |
| 25 | 5.6 | Bright |
| 26 | 5.6 | Bright |
| 27 | 5.6 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.6 | Bright |
| 30 | 5.6 | Bright |
| 31 | 5.6 | Bright |
Hazard calendar for Sanya
In May, Sanya sits inside its pacific typhoon and monsoon 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.
Is May a good time to visit Sanya?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a reasonable time to visit Sanya for sightseeing.
What to pack for Sanya in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Sanya sees daytime highs around 29°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.
Sea temperature near Sanya in May
The nearest coast averages about 28°C in May — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 23 | 24 | 26 | 28 | 29 | 29 | 29 | 29 | 28 | 26 | 25 |
| Comfort | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 24 | Warm |
| Apr | 26 | Warm |
| May | 28 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Warm |
| Nov | 26 | Warm |
| Dec | 25 | Warm |
UV index in Sanya in May
Clear-sky midday UV in May 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 11 | 11 | 11 | 12 | 13 | 13 | 11 | 10 | 8 | 7 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 11 | Extreme |
| Apr | 11 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Sanya in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 20 | 19 | 17 | 15 | 11 | 12 | 11 | 11 | 11 | 18 | 18 | 23 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 19 | Moderate |
| Mar | 17 | Moderate |
| Apr | 15 | Moderate |
| May | 11 | Good |
| Jun | 12 | Good |
| Jul | 11 | Good |
| Aug | 11 | Good |
| Sep | 11 | Good |
| Oct | 18 | Moderate |
| Nov | 18 | Moderate |
| Dec | 23 | Moderate |
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.
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 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).