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.
Cat Ba Monthly Temperatures
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:
Daily Historical Temperatures
49-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in June
Historical Cat Ba Temperatures: 1976-2026
Browse day-by-day temperature records for Cat Ba spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Cat Ba vs Vietnam
The map below shows the annual temperature across Vietnam. You can also select individual months if you want to compare a specific time of year.
very warm
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moderate
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Cat Ba vs World: Temperature Compared
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.
What Does the Temperature Feel Like in Cat Ba?
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.
