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Weather & Climate in Sanmenpo, China
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sanmenpo has a warm climate with an average annual temperature of 76°F (24°C). Winters average 64°F in January while summers reach 84°F in July. The area gets 268 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 65.7 inches (wetter than the 38-inch national average). The city sits at an elevation of 367 feet.
Temperature
64°F Jan (18°C)
84°F Jul (29°C)
| Annual Average | 76.0°F |
| 41% above US avg | |
| January Average | 64°F (18°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 268 days/yr |
Geography
| Elevation | 367 ft (112 m) |
| Area | 949.5 sq mi (2,459.2 km²) |
| Population Density | 0/sq mi |
| Coordinates | 19.7166°N, 110.5581°W |
| Timezone | Asia/Shanghai |
Precipitation & Snow
Air Quality
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.4.
| Mar 23, 1995 | 60 km NNW of Lincheng, China | M4.4 | 139 km | 33 km |
| Apr 15, 1995 | 68 km NNW of Lincheng, China | M4.3 | 146 km | 33 km |
| May 7, 1995 | 63 km NNW of Lincheng, China | M4.2 | 143 km | 10 km |
| May 17, 1999 | Hainan, China | M4.2 | 147 km | 33 km |
| Feb 25, 1996 | 49 km WNW of Lincheng, China | M4.1 | 143 km | 20 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
74 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Ragasa | Category 3 | — | 238 km |
| 2025 | Matmo | Category 2 | — | 99 km |
| 2025 | Kajiki | Category 2 | — | 238 km |
| 2025 | Wutip | Category 1 | — | 166 km |
| 2024 | Yagi | Category 5 | 121 mph | 33 km |
| 2024 | Yinxing | Category 3 | 98 mph | 257 km |
| 2023 | Saola | Category 2 | 69 mph | 279 km |
| 2023 | Talim | Category 1 | 69 mph | 164 km |
| 2022 | Chaba | Category 1 | 81 mph | 150 km |
| 2021 | Rai | Category 1 | 81 mph | 292 km |
| 2021 | Cempaka | Category 1 | 81 mph | 261 km |
| 2018 | Mangkhut | Category 1 | 75 mph | 286 km |
| 2017 | Khanun | Category 2 | 81 mph | 138 km |
| 2016 | Sarika | Category 1 | 69 mph | 105 km |
| 2015 | Mujigae | Category 4 | 98 mph | 131 km |
| 2014 | Rammasun | Category 5 | 104 mph | 50 km |
| 2014 | Kalmaegi | Category 1 | 86 mph | 54 km |
| 2013 | Haiyan | Category 2 | 81 mph | 249 km |
| 2013 | Utor | Category 2 | 81 mph | 207 km |
| 2013 | Rumbia | Category 1 | 58 mph | 71 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Nearby Volcanoes
1 volcano within 200 km. Closest: Hainan Volcanic Field (40 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Hainan Volcanic Field | Pyroclastic cone(s) | 196 m (643 ft) | 1933 | 40 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 64°F (18°C) | 0.9 in | Coldest, Driest |
| February | 67°F (19°C) | 1.3 in | |
| March | 72°F (22°C) | 1.8 in | |
| April | 78°F (25°C) | 3.7 in | |
| May | 82°F (28°C) | 7.3 in | |
| June | 84°F (29°C) | 9.6 in | |
| July | 84°F (29°C) | 9.6 in | Warmest |
| August | 83°F (28°C) | 10.7 in | Wettest |
| September | 81°F (27°C) | 10.0 in | |
| October | 78°F (25°C) | 8.2 in | |
| November | 72°F (22°C) | 3.0 in | |
| December | 67°F (19°C) | 1.3 in |
Sanmenpo has a seasonal temperature swing of 20°F / from 64°F in January to 84°F in July. Total annual precipitation is 67.4 inches, with August being the wettest month (10.7") and January the driest (0.9").