Cat Ba Temperature by Month

Cat Ba in Hai Phong Municipality, Vietnam sees significant seasonal temperature differences, with daytime highs between 20°C (68°F) in January and 32°C (90°F) in June, averaging 27°C (81°F) annually. Explore the full monthly breakdown below.

The climate in Cat Ba is known for significant temperature differences throughout the year. At night, this contrast is just as clear, with lows ranging from 28°C (82°F) in June to 16°C (61°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Cat Ba by month:

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. June, the warmest month, sees 173 hours of sunshine.

The chart below shows the average temperature throughout the year:

Cat Ba's average annual maximum temperature is 27°C (81°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

Queenstown, New Zealand averages 10°C (50°F) annually, remember seasons are flipped, so its coldest months fall in June and July.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Cat Ba, January is the coolest month, with average highs of 20°C (68°F) and humidity around 80%, considered very high. In June, the warmest month, temperatures average 32°C (90°F) with 84% humidity, conditions that feel very high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Cat Ba's weather, including monthly rainfall, sunshine hours, and humidity, visit our Cat Ba climate page.