Last updated: January 18, 2025
Haiphong, Vietnam, features a Cwa climate classification, characterized by its distinct seasonal variations. The region experiences a minimum temperature of 7°C (45°F) in February, rising to an average of 25°C (77°F) throughout the year. The hottest month, June, sees temperatures peak at 39°C (102°F), emphasizing the warm conditions prevalent during the summer. This climate profile highlights both the cooler winter months and the sweltering heat of mid-year, revealing the dynamic weather patterns that shape life in Haiphong.
Haiphong, Vietnam, exhibits a distinct seasonal temperature pattern marked by mild winters and hot summers. The year begins with cooler temperatures in January and February, where minimums drop to 7°C (45°F) and average highs reach around 28°C (83°F). As spring unfolds in March and April, temperatures gradually increase, with averages climbing to 24°C (76°F) and peaks nearing 35°C (95°F). The summer months of May through August bring the most intense heat, characterized by minimums from 18°C (65°F) to 25°C (78°F) and maximums soaring to 39°C (102°F) in June. As autumn approaches in September and October, temperatures begin to moderate, with averages around 26°C (78°F) and maximums decreasing from 36°C (97°F) to 34°C (94°F). The year concludes with a return to cooler conditions in December, reminiscent of the winter months, solidifying Haiphong's rhythm of warm summers and temperate winters.
In Haiphong, February temperatures range from a minimum of 9°C (48°F) to a maximum of 36°C (96°F) in June, while Cat Ba experiences similar February lows of 9°C (49°F) and slightly lower June highs of 34°C (94°F). For more detailed temperature information, visit monthly temperatures in Haiphong and monthly temperatures in Cat Ba.
Haiphong, Vietnam, presents a varied precipitation pattern throughout the year, with distinct wet and dry seasons. The cooler months of January and February receive relatively low rainfall, averaging 29 mm (1.2 in) and 31 mm (1.2 in), respectively, and typically experiencing around six rainy days each month. Precipitation begins to increase in March, reaching 49 mm (1.9 in) over 12 days, and continues to rise into April with 84 mm (3.3 in). However, it is during the summer months from May to August that Haiphong faces its heaviest rainfall, with May recording 160 mm (6.3 in), peaking in August with a staggering 482 mm (19.0 in) over approximately 25 days.
The wettest period corresponds to the monsoon season, where the intensity and frequency of rainfall challenge residents and local infrastructure. July and August are particularly pronounced, with July experiencing 287 mm (11.3 in) and August maintaining the highest precipitation levels. Following this peak, September and October also see significant rainfall, measuring 288 mm (11.3 in) and 256 mm (10.1 in), respectively. As the year comes to a close, precipitation decreases sharply in November and December, dropping to 51 mm (2.0 in) and 37 mm (1.5 in), indicating a transition towards drier conditions typical of the winter months.
Haiphong, Vietnam, experiences a notable increase in sunshine duration as the year progresses, with winter months yielding fewer hours of sunlight and a distinct peak during the summer. In January, residents enjoy around 172 hours of sunshine, which gradually increases to 219 hours in February. By March, the hours remain consistent at 203 hours, setting the stage for the more radiant months ahead. The arrival of spring ushers in longer days, culminating in April, where sunshine durations reach 253 hours, marking a significant transition towards brighter days.
The zenith of sunshine occurs in the summer, specifically in May, when Haiphong basks in an impressive 309 hours of sunlight, making it the sunniest month of the year. This high level of solar exposure is maintained into June and July, with 299 hours and 296 hours, respectively, highlighting the region's favorable summer climate. As the summer wanes, August still retains a generous 263 hours, but a gradual decline is evident moving into September and October, where hours decrease to 283 hours and 257 hours. By November, the sunshine hours taper off to 251 hours, and December sees a further reduction to 236 hours. Overall, the seasonal trends illustrate a clear pattern of increasing sunlight leading into summer, followed by a gradual decline, indicating the dynamic nature of Haiphong’s climate.
The UV Index in Haiphong, Vietnam, exhibits significant variability throughout the year, with notably high levels during the peak summer months. Starting in January, the UV Index registers at 8, categorizing it as "very high" with a burn time of just 15 minutes. This trend continues into February, with an increase to 10. However, the most dramatic rise occurs in March, where the UV Index reaches 12, transitioning to the "extreme" exposure category, indicating the need for heightened sun protection. Notably, this extreme level persists through April and maintains its peak throughout the summer months of May to September, all registering a consistent UV Index of 13 and a burn time of only 10 minutes.
As fall approaches, there is a noticeable decline in UV radiation, beginning with October at an Index of 11, still in the "extreme" category. November sees a further decrease to 9, placing it back in the "very high" range, while December brings the lowest UV Index of the year at 7. This reduction corresponds with a longer burn time of 25 minutes, reflecting the seasonal shift towards cooler and less intense sun exposure. Overall, the data underscores the importance of sun safety precautions during the late winter and summer months when UV levels pose a greater risk to skin health.
UV Risk Categories
In Haiphong, Vietnam, daylight duration follows a predictable seasonal pattern, beginning with shorter days in winter and gradually extending into the longer days of summer. January and February each feature 11 hours of daylight, maintaining a consistent level as the year begins. As spring arrives, daylight begins to increase, with March and April each providing 12 hours of light. This trend culminates in the summer months of May, June, and July, where daylight peaks at 13 hours, offering ample time for outdoor activities and sunlight exposure.
As summer transitions to fall, daylight duration begins to decrease once again, returning to 12 hours in August and September. By October and November, daylight shortens slightly to 11 hours, marking the onset of cooler conditions. December presents the shortest daylight duration of the year at 10 hours, indicating the winter solstice's influence on sunlight availability. This clear seasonal variation highlights the ebb and flow of daylight in Haiphong, fostering a rhythm that accompanies the climatic changes throughout the year.
The climate in Cat Ba, Vietnam features a temperate pattern with distinct seasons. Winter months (January to March) are mild, with temperatures ranging from 9°C to 27°C (49°F to 80°F), while summer (June to August) sees higher temperatures between 24°C and 34°C (76°F to 94°F), accompanied by significant rainfall, peaking in August at 567 mm (22.3 in). The region experiences the most sunshine in May, with an impressive 312 hours, while precipitation is notably high during the summer months. For more information, visit Cat Ba climate.
Haiphong, Vietnam experiences a tropical climate characterized by distinct wet and dry seasons. Temperatures range from a cool 9°C (49°F) in January to a hot 35°C (95°F) during the summer months of May to August. Precipitation peaks in July and August, averaging over 500 mm (19.7 in), while sunshine is abundant, especially from May to October. The city enjoys a moderate amount of sunlight, with over 300 hours in May and June. For a detailed look at the climate, visit Haiphong climate.
In conclusion, Haiphong, Vietnam, showcases a dynamic climate characterized by significant seasonal variations in temperature, precipitation, sunshine duration, UV Index, and daylight hours. The region experiences mild winters and hot summers, with temperatures peaking in June at 39°C (102°F) and a substantial increase in rainfall during the monsoon months from May to August. Sunshine duration reaches its zenith in late spring and summer, fostering a vibrant atmosphere ideal for outdoor activities. The UV Index also underscores the necessity for sun protection during the extreme summer months, where careful attention is warranted due to elevated radiation levels. Overall, understanding these climatic patterns is essential for both residents and visitors to navigate and enjoy the unique environmental conditions that Haiphong has to offer throughout the year.