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Weather & Climate in Sanya, China
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sanya has a warm climate with an average annual temperature of 78°F (25°C). Winters average 70°F in January while summers reach 83°F in July / relatively mild seasonal variation. The area gets 232 sunny days per year, above the national average. Annual precipitation totals 57.4 inches (wetter than the 38-inch national average). The city sits at an elevation of 3 feet.
Temperature
70°F Jan (21°C)
83°F Jul (28°C)
| Annual Average | 77.6°F |
| 44% above US avg | |
| January Average | 70°F (21°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 232 days/yr |
Geography
| Elevation | 3 ft (1 m) |
| Area | 741.2 sq mi (1,919.6 km²) |
| Population Density | 1,392/sq mi |
| Coordinates | 18.2544°N, 109.5095°W |
| Timezone | Asia/Shanghai |
Precipitation & Snow
Air Quality
Earthquake History
3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.4.
| Jun 5, 1995 | 122 km NW of Sanya, China | M4.4 | 122 km | 10 km |
| May 17, 1999 | Hainan, China | M4.2 | 92 km | 33 km |
| Oct 16, 2002 | 104 km SE of Dadonghai, China | M4.1 | 107 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
65 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Matmo | Category 2 | — | 295 km |
| 2025 | Kajiki | Category 2 | — | 45 km |
| 2025 | Bualoi | Category 1 | — | 193 km |
| 2025 | Wutip | Category 1 | — | 232 km |
| 2024 | Yagi | Category 4 | 121 mph | 207 km |
| 2022 | Noru | Category 4 | 98 mph | 273 km |
| 2022 | Nesat | Category 1 | — | 290 km |
| 2021 | Rai | Category 1 | 92 mph | 188 km |
| 2020 | Vamco | Category 3 | 98 mph | 200 km |
| 2017 | Doksuri | Category 2 | 92 mph | 119 km |
| 2016 | Sarika | Category 1 | 69 mph | 93 km |
| 2014 | Rammasun | Category 5 | 104 mph | 242 km |
| 2014 | Kalmaegi | Category 1 | 86 mph | 245 km |
| 2013 | Wutip | Category 3 | 75 mph | 141 km |
| 2013 | Haiyan | Category 2 | 86 mph | 59 km |
| 2013 | Rumbia | Category 1 | 58 mph | 265 km |
| 2013 | Nari | Category 1 | 86 mph | 240 km |
| 2012 | Son-tinh | Category 3 | 98 mph | 106 km |
| 2011 | Nesat | Category 1 | 75 mph | 240 km |
| 2010 | Mindulle | Category 1 | 52 mph | 234 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Nearby Volcanoes
1 volcano within 200 km. Closest: Hainan Volcanic Field (199 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Hainan Volcanic Field | Pyroclastic cone(s) | 196 m (643 ft) | 1933 | 199 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 70°F (21°C) | 1.0 in | Coldest |
| February | 71°F (22°C) | 0.9 in | Driest |
| March | 75°F (24°C) | 1.1 in | |
| April | 80°F (27°C) | 1.9 in | |
| May | 83°F (28°C) | 4.1 in | |
| June | 83°F (29°C) | 6.2 in | Warmest |
| July | 83°F (28°C) | 5.4 in | |
| August | 82°F (28°C) | 7.5 in | |
| September | 81°F (27°C) | 10.9 in | |
| October | 78°F (26°C) | 11.5 in | Wettest |
| November | 75°F (24°C) | 5.1 in | |
| December | 71°F (21°C) | 1.7 in |
Sanya has a seasonal temperature swing of 14°F / from 70°F in January to 83°F in June. Total annual precipitation is 57.4 inches, with October being the wettest month (11.5") and February the driest (0.9").