| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 24.3° | 16.3° | 12.5mm | 4.6 | 91 |
| February | 25.2° | 17.9° | 14.7mm | 4.5 | 91 |
| March | 27.3° | 21° | 19.1mm | 3.5 | 92 |
| April | 29.4° | 22.6° | 54mm | 5.5 | 79 |
| May | 30.9° | 24° | 132.2mm | 9.7 | 65 |
| June | 31.2° | 24.9° | 155.2mm | 13.2 | 57 |
| July | 30.7° | 24.3° | 305.4mm | 16.5 | 55 |
| August | 30.6° | 24.1° | 303.2mm | 16.2 | 56 |
| September | 30.3° | 23.6° | 340.9mm | 18.6 | 57 |
| October | 29.2° | 21.5° | 321.8mm | 13.9 | 63 |
| November | 27.7° | 20.1° | 100.6mm | 6.5 | 84 |
| December | 25.1° | 16.7° | 17.3mm | 4.3 | 91 |
January in Sanya averages a daily high of 24.3°C with nights around 16.3°C. Expect roughly 4.6 wet days totalling 12.5mm. Comfortable conditions for being outdoors all day.
February in Sanya averages a daily high of 25.2°C with nights around 17.9°C. Expect roughly 4.5 wet days totalling 14.7mm. Comfortable conditions for being outdoors all day.
March in Sanya averages a daily high of 27.3°C with nights around 21°C. Expect roughly 3.5 wet days totalling 19.1mm. Comfortable conditions for being outdoors all day.
April in Sanya averages a daily high of 29.4°C with nights around 22.6°C. Expect roughly 5.5 wet days totalling 54mm. Comfortable conditions for being outdoors all day.
May in Sanya averages a daily high of 30.9°C with nights around 24°C. Expect roughly 9.7 wet days totalling 132.2mm. Generally workable, with some weather to plan around.
June in Sanya averages a daily high of 31.2°C with nights around 24.9°C. Expect roughly 13.2 wet days totalling 155.2mm. Generally workable, with some weather to plan around.
July in Sanya averages a daily high of 30.7°C with nights around 24.3°C. Expect roughly 16.5 wet days totalling 305.4mm. Generally workable, with some weather to plan around.
August in Sanya averages a daily high of 30.6°C with nights around 24.1°C. Expect roughly 16.2 wet days totalling 303.2mm. Generally workable, with some weather to plan around.
September in Sanya averages a daily high of 30.3°C with nights around 23.6°C. Expect roughly 18.6 wet days totalling 340.9mm. Generally workable, with some weather to plan around.
October in Sanya averages a daily high of 29.2°C with nights around 21.5°C. Expect roughly 13.9 wet days totalling 321.8mm. Generally workable, with some weather to plan around.
November in Sanya averages a daily high of 27.7°C with nights around 20.1°C. Expect roughly 6.5 wet days totalling 100.6mm. Comfortable conditions for being outdoors all day.
December in Sanya averages a daily high of 25.1°C with nights around 16.7°C. Expect roughly 4.3 wet days totalling 17.3mm. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Sanya peaks at 92.
Based on 30 years of records, November–March scores highest for comfort in Sanya, balancing daytime temperature against rainfall.
June is the warmest, averaging a daily high of 31.2°C.
September is the wettest, averaging 340.9mm of rain across roughly 18.6 wet days.
January is the coolest month, with average daily highs around 24.3°C.