Cat Ba Weather in May
In Cat Ba, May brings high daytime temperatures around 29°C (84°F), with nights cooling to 26°C (79°F). This month falls within the rainy season, so expect frequent rainfall.
Rainfall in Cat Ba in May
As part of the rainy season, Cat Ba sees around 14 days of rain in May, with an average of 190 mm (7.5 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.
Temperature in Cat Ba in May
May in Cat Ba sees highs of 29°C (84°F) and lows of 26°C (79°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights stay warm at around 26°C (79°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Cat Ba in May
The days are predominantly sunny, with an estimated total of around 190 hours of sunshine. Rain is often only seen in the afternoon or evening, leaving clear skies for most of the day. This results in rainy months that still feel bright and are suitable for travel.If you prefer enjoying temperate temperatures and rain-free days, January, February, March, April, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Cat Ba's climate page.
Cat Ba Temperature in May
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Chance of Rain
45%
Precipitation
190 mm (7.5 in)
Rainy days
14 days
Humidity
84% *
Sunshine
190 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cat Ba typically stay consistent throughout May, with daily highs averaging around 29°C (84°F). Nights are warm, with lows typically ranging from 23°C (73°F) to 26°C (79°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Cat Ba in May
Browse day-by-day weather records for Cat Ba spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cat Ba historical weather extremes in May
Our historical data for Cat Ba spans 1994 to 2026, revealing these weather extremes.
- The warmest day in May was on May 21, 1998, with a maximum of 40°C (104°F).
- On May 5, 2004, Cat Ba saw its coldest May day with temperatures maxing out at 20°C (68°F).
- The lowest overnight temperature recorded in May was 17°C (63°F) (May 5, 1994).
Best Places in Vietnam in May
Find out more about the weather in Vietnam and which places have the best travel conditions in this month. See all of Vietnam in May →
perfect weather
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What to Wear in Cat Ba in May
Warm but pleasant conditions in Cat Ba in May. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Cat Ba in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Cat Ba's climate page.
Temperature Rainfall Sunshine Humidity
See the full Cat Ba climate overview or explore weather in Vietnam.
