Climate averages 1991–2020
Sanya weather
in December.
A warm, fairly dry month: the 11th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Sanya: daytime highs average 24.6°C and nights cool to about 19.3°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 26 mm of rain on roughly 3 days, which makes December a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 03 min on an average December day.
The nearest other city in this atlas is Wuzhishan (59 km away). In December its highs average 22.9°C, 1.7°C cooler than Sanya, with 24 mm of rain.
Among the 884 cities listed in China, Sanya ranks 1st of 884 for the warmest December highs and joint 498th of 884 for the driest December (rainfall, lowest first). The mean December high of those 884 cities is 7.5°C; Sanya is 17.0°C warmer than that mean.
From December to January, average highs fall by 0.5°C to 24.1°C, and monthly rainfall falls from 26 mm to 12 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Wuzhishan in DecemberChina · 59 kmHigh 22.9°C · Low 15.9°C · 24 mm rain
- Wanning in DecemberChina · 110 kmHigh 22.7°C · Low 19.5°C · 110 mm rain
- Basuo in DecemberChina · 130 kmHigh 23.8°C · Low 18.4°C · 27 mm rain
- Yaxing in DecemberChina · 135 kmHigh 22.8°C · Low 15.9°C · 24 mm rain
- Dacheng in DecemberChina · 140 kmHigh 23.1°C · Low 16.0°C · 27 mm rain
- Nada in DecemberChina · 141 kmHigh 22.8°C · Low 16.0°C · 27 mm rain
- Qionghai in DecemberChina · 149 kmHigh 22.8°C · Low 18.8°C · 36 mm rain
- Sandu in DecemberChina · 173 kmHigh 22.4°C · Low 18.1°C · 41 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.