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Weather & Climate in Cát Bà, Vietnam
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cát Bà has a warm climate with an average annual temperature of 74°F (23°C). Winters average 61°F in January while summers reach 83°F in July. The area gets 221 sunny days per year, above the national average. Annual precipitation totals 72.4 inches (wetter than the 38-inch national average). The city sits at an elevation of 79 feet.
Temperature
61°F Jan (16°C)
83°F Jul (28°C)
| Annual Average | 73.5°F |
| 36% above US avg | |
| January Average | 61°F (16°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 221 days/yr |
Geography
| Elevation | 79 ft (24 m) |
| Area | 293.6 sq mi (760.3 km²) |
| Population Density | 102/sq mi |
| Coordinates | 20.7278°N, 107.0482°W |
| Timezone | Asia/Ho_Chi_Minh |
Precipitation & Snow
Air Quality
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Sep 23, 1994 | 49 km W of Móng Cái, Vietnam | M4.6 | 101 km | 33 km |
| Apr 3, 2006 | 111 km SSE of Cát Bà, Vietnam | M4.0 | 112 km | 25 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
42 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Kajiki | Category 2 | — | 263 km |
| 2025 | Matmo | Category 1 | — | 199 km |
| 2025 | Bualoi | Category 1 | — | 295 km |
| 2025 | Wutip | Category 1 | — | 219 km |
| 2024 | Yagi | Category 3 | 104 mph | 20 km |
| 2023 | Talim | Category 1 | 63 mph | 249 km |
| 2016 | Mirinae | Category 1 | 52 mph | 106 km |
| 2015 | Mujigae | Category 1 | 81 mph | 276 km |
| 2014 | Rammasun | Category 4 | 81 mph | 157 km |
| 2014 | Kalmaegi | Category 1 | 86 mph | 83 km |
| 2013 | Haiyan | Category 1 | 75 mph | 40 km |
| 2012 | Son-tinh | Category 3 | 92 mph | 40 km |
| 2012 | Kai-tak | Category 1 | 69 mph | 299 km |
| 2010 | Mindulle | Category 1 | 52 mph | 293 km |
| 2008 | Hagupit | Category 1 | 69 mph | 215 km |
| 2005 | Damrey | Category 1 | 81 mph | 296 km |
| 2003 | Krovanh | Category 2 | 75 mph | 83 km |
| 2003 | Nepartak | Category 1 | 63 mph | 272 km |
| 2001 | Durian | Category 1 | 58 mph | 211 km |
| 2000 | Wukong | Category 1 | 69 mph | 271 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 61°F (16°C) | 0.5 in | Coldest, Driest |
| February | 63°F (17°C) | 1.3 in | |
| March | 67°F (19°C) | 1.3 in | |
| April | 73°F (23°C) | 2.9 in | |
| May | 79°F (26°C) | 6.3 in | |
| June | 83°F (28°C) | 8.0 in | |
| July | 83°F (28°C) | 16.5 in | Warmest, Wettest |
| August | 82°F (28°C) | 16.2 in | |
| September | 81°F (27°C) | 14.2 in | |
| October | 77°F (25°C) | 3.2 in | |
| November | 70°F (21°C) | 1.3 in | |
| December | 64°F (18°C) | 0.7 in |
Cát Bà has a seasonal temperature swing of 22°F / from 61°F in January to 83°F in July. Total annual precipitation is 72.4 inches, with July being the wettest month (16.5") and January the driest (0.5").