Climate averages 1991–2020
Sanya weather
in May.
A hot, wet month: the 2nd warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Sanya: daytime highs average 30.3°C and nights cool to about 26.0°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 139 mm of rain on roughly 19 days, which makes May a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 59 min on an average May day.
The nearest other city in this atlas is Wuzhishan (59 km away). In May its highs average 30.2°C, about as warm as Sanya, with 186 mm of rain.
Among the 884 cities listed in China, Sanya ranks joint 10th of 884 for the warmest May highs and joint 566th of 884 for the driest May (rainfall, lowest first). The mean May high of those 884 cities is 25.2°C; Sanya is 5.1°C warmer than that mean.
From May to June, average highs rise by 0.1°C to 30.4°C, and monthly rainfall rises from 139 mm to 212 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sanya climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.1°C18.5°C | 18.5°C | 12 | 2.4 | 11.211 h |
| February | 25.1°C19.5°C | 19.5°C | 9.9 | 2.5 | 11.512 h |
| March | 27.2°C21.9°C | 21.9°C | 18 | 3.8 | 12.012 h |
| April | 29.2°C24.4°C | 24.4°C | 53 | 8.6 | 12.513 h |
| May, selected | 30.3°C26.0°C | 26.0°C | 139 | 18.9 | 13.013 h |
| June | 30.4°C26.7°C | 26.7°C | 212 | 22.2 | 13.213 h |
| July | 30.0°C26.4°C | 26.4°C | 280 | 23.0 | 13.113 h |
| August | 29.9°C26.1°C | 26.1°C | 261 | 24.3 | 12.713 h |
| September | 29.5°C25.4°C | 25.4°C | 258 | 22.3 | 12.312 h |
| October | 28.4°C24.0°C | 24.0°C | 182 | 14.0 | 11.712 h |
| November | 26.9°C22.0°C | 22.0°C | 54 | 5.6 | 11.311 h |
| December | 24.6°C19.3°C | 19.3°C | 26 | 3.0 | 11.111 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Wuzhishan in MayChina · 59 kmHigh 30.2°C · Low 23.8°C · 186 mm rain
- Wanning in MayChina · 110 kmHigh 29.5°C · Low 26.1°C · 87 mm rain
- Basuo in MayChina · 130 kmHigh 30.8°C · Low 26.2°C · 125 mm rain
- Yaxing in MayChina · 135 kmHigh 31.4°C · Low 23.9°C · 156 mm rain
- Dacheng in MayChina · 140 kmHigh 31.9°C · Low 24.0°C · 185 mm rain
- Nada in MayChina · 141 kmHigh 31.7°C · Low 24.0°C · 185 mm rain
- Qionghai in MayChina · 149 kmHigh 30.2°C · Low 25.8°C · 149 mm rain
- Sandu in MayChina · 173 kmHigh 30.8°C · Low 25.7°C · 108 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sanya) is explained once on the Sanya year overview and on the Sources, method and limits page.