Last updated: August 28, 2025
In April, Ha Long, Vietnam, experiences a warm climate that showcases the region's vibrant allure. With maximum temperatures reaching a sultry 33°C (91°F) and an average of 24°C (75°F), visitors can expect pleasant days marked by occasional respite from the coolest lows of 14°C (58°F). Humidity levels hover around 64%, creating an inviting atmosphere despite the backdrop of fluctuating weather. Rainfall is a defining factor this month, with 91 mm (3.6 in) of precipitation across an average of 15 days, adding a refreshing touch to the lush landscapes. Embrace the unique beauty of Ha Long this month, where every rainy moment contributes to its enchanting scenery.
In April, Ha Long, Vietnam, showcases a delightful transition into warmer weather, making it a captivating time to visit. With minimum temperatures around 14°C (58°F) and average highs reaching 33°C (91°F), the month offers a pleasant mix of warmth without the uncomfortable heat of the summer months ahead. This is a significant rise from the cooler temperatures of March, where daily averages hovered around 21°C (71°F). As the sea breeze flows through the iconic limestone karsts, visitors can expect to enjoy activities ranging from cruising to hiking in more temperate conditions. With April's average temperature settling at a comfortable 24°C (75°F), it's an ideal time to explore Ha Long’s stunning natural beauty before the peak summer warmth takes hold in May.
April marks a significant uptick in precipitation in Ha Long, Vietnam, with rainfall soaring to 91 mm (3.6 in) over 15 days. This rise from the previous months indicates a transition into the wetter season, setting the stage for even heavier rainfall in May and June, which typically see 184 mm (7.2 in) and 240 mm (9.4 in) respectively. Interestingly, while April's rainfall may seem abundant compared to the earlier months, it foreshadows an intensifying pattern, as subsequent months like July and August often experience peak precipitation levels that can soar above 500 mm (20.5 in). This trend reflects the tropical climate's rhythm, where April serves as a prelude to the lush and vibrant landscapes that follow, with increased rainfall fostering the region's renowned natural beauty.
April in Ha Long, Vietnam experiences a moderate humidity level of 64%, offering a pleasant transition towards the more humid summer months. As temperatures begin to rise in the spring, April marks a slight dip from the higher levels noted in the previous months, such as February's 71% and March's 69%. This decrease sets the stage for the approaching wet season, with humidity steadily increasing from May onwards, reaching a peak of 90% in July. The gradual rise in humidity as the year progresses highlights Ha Long's characteristic tropical climate, making April an ideal time for visitors to enjoy the scenic beauty without the overwhelming stickiness of midsummer.
In April, Ha Long, Vietnam, experiences an extreme UV Index of 13, indicating a significant risk of harm from unprotected sun exposure, with a burn time of just 10 minutes. This marks a continuation of the trend established in the preceding months, where the UV Index steadily rose from 8 in January to 12 in March. Following April, the UV levels remain high through May and into the summer months, emphasizing the importance of sun protection during this period. As temperatures rise and clear skies dominate, it's essential for residents and visitors alike to take precautions against the intense sun. For a detailed guide, visit Ha Long UV Index.
UV Risk Categories
As April unfolds in Ha Long, Vietnam, residents and visitors alike are greeted by a generous 248 hours of sunshine, making it a delightful time to enjoy the region's stunning vistas. This remarkable increase in daylight follows a promising trend from March's 201 hours, signaling the advent of warmer, brighter days. April's sunshine paves the way for the peak of spring, where outdoor adventures beckon amidst the breathtaking limestone karsts. Looking ahead, the month of May is poised to escalate the sun-kissed experience even further with an impressive 307 hours of sunlight, promising vibrant days ahead for all who venture into this picturesque coastal paradise.
In Ha Long, Vietnam, April sees a noticeable dip in the likelihood of sunny weather, with only a 20% chance of sun. This trend marks a significant decrease from the previous months, especially compared to the higher probabilities in January (43%) and February (51%). As spring unfolds, the sunny disposition begins to wane, leading into the rainier months ahead. Interestingly, the weather patterns indicate a gradual rise in sunshine again by November (46%) and December (53%), suggesting that while April may not be the sunniest month, the year eventually bounces back to brighter days.
As April unfolds in Ha Long, Vietnam, the region enjoys a delightful 12 hours of daylight, continuing the steady trend established over the previous month. This balance of light heralds the transition toward the longer days of summer, with daylight hours gradually increasing to 13 hours in May and extending through the heart of the summer months. Each passing month from January’s 10 hours to April’s consistent 12 indicates a gradual approach to the sun-drenched days ahead, enhancing the vibrant landscapes and inviting outdoor adventures. As the year progresses, Ha Long emerges from its winter slumber, inviting both residents and visitors to bask in the natural beauty illuminated by the elongated daylight.
In Ha Long, Vietnam, the April winds herald a subtle shift in the coastal breeze. With an average wind speed of 3.0 m/s (7 mph), April stands as a gentle transition from the cooler months of winter and early spring. While January through March flirt with similar speeds, it’s in April that a noticeable uptick occurs, setting the stage for the breezier months ahead. As temperatures rise, the winds continue to strengthen into May and June, both reaching 3.7 m/s (8 mph), before tapering off again in the warm summer heat. This mild April breeze not only enhances the gem-like beauty of Ha Long's limestone karsts but also invites both locals and travelers to revel in outdoor adventures before the summer peaks.
Weather in Ha Long varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Ha Long, focusing on differences in temperature, rainfall, humidity, and UV levels.
April weather is significantly warmer than January, with minimum temperatures starting at 14°C (58°F) compared to January's cooler 8°C (46°F). The average temperature in April reaches 24°C (75°F), while January's average is only 18°C (64°F). Maximum temperatures in April can soar up to 33°C (91°F), whereas January peaks at a milder 26°C (80°F). Additionally, April experiences much more precipitation, totaling 91 mm (3.6 in) over 15 days, in contrast to January's 28 mm (1.1 in) during just 5 days. Humidity levels are slightly lower in January at 66%, compared to April's 64%. For a more detailed look at January weather, visit Ha Long weather in January.
In February, the weather is milder, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 27°C (80°F), averaging at 18°C (65°F). The month experiences less precipitation, with only 36 mm (1.4 in) falling over about 7 days and an average humidity of 71%. In contrast, April is significantly warmer, with temperatures ranging from 14°C (58°F) to 33°C (91°F) and an average of 24°C (75°F). However, April is wetter, receiving 91 mm (3.6 in) of rain over approximately 15 days and boasts a slightly lower humidity level of 64%. For those interested in exploring February's climate details, you can check Ha Long weather in February.
In comparing the weather between March and April in Ha Long, we see a noticeable warming trend. While both months feature a minimum temperature of around 14°C (57-58°F), April boasts a higher average temperature of 24°C (75°F) and a peak of 33°C (91°F), compared to March’s average of 21°C (71°F) and maximum of 31°C (88°F). Additionally, April experiences more precipitation, with 91 mm (3.6 in) over 15 days, while March has only 52 mm (2.0 in) during the same number of days. Humidity levels are slightly lower in April at 64%, compared to March's 69%. For more detailed weather insights, visit Ha Long weather in March.
April and May offer distinct weather characteristics, showcasing the transition into hotter conditions. In April, temperatures range from a minimum of 14°C (58°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F). The month experiences 91 mm (3.6 in) of precipitation over 15 days and maintains a humidity level of 64%. In contrast, May sees warmer temperatures, with a minimum of 19°C (66°F) and a maximum reaching 36°C (98°F), averaging at 27°C (81°F). Rainfall increases significantly to 184 mm (7.2 in) over 19 days, accompanied by a higher humidity of 73%. For more details on the weather conditions in May, you can visit Ha Long weather in May.
April and June showcase distinct weather patterns, highlighting the transition from spring to the early summer months. In April, temperatures range from a minimum of 14°C (58°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F). The month experiences around 91 mm (3.6 in) of precipitation over approximately 15 days, accompanied by a humidity level of 64%. In contrast, June sees warmer conditions, with temperatures ranging from 23°C (74°F) at night to soaring to 38°C (100°F) during the day, yielding an average of 30°C (86°F). The month is also significantly wetter, accumulating 240 mm (9.4 in) of rainfall over 20 days and a higher humidity of 81%. This marked difference in climate makes June notably more humid and rainy compared to the milder April weather. For more details, check Ha Long weather in June.
April and July present distinctly different weather conditions. In April, temperatures range from a minimum of 14°C (58°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F). Precipitation is moderate at 91 mm (3.6 in) over approximately 15 days, accompanied by a humidity level of 64%. In stark contrast, July experiences significantly warmer temperatures, with a minimum of 25°C (77°F), an average of 29°C (85°F), and a peak of 36°C (98°F). Rainfall also surges in July, totaling 287 mm (11.3 in) across 24 days, and humidity spikes to a high 90%. For further details on weather specifics, you can check Ha Long weather in July.
April and August present distinct contrasts in weather. In April, temperatures range from a mild 14°C (58°F) at night to a warm maximum of 33°C (91°F) during the day, with an average of 24°C (75°F). The month experiences an average of 91 mm (3.6 in) of precipitation over 15 days, accompanied by a moderate humidity level of 64%. In contrast, August sees much warmer conditions, with nighttime temperatures starting at 24°C (76°F) and soaring to highs of 36°C (97°F), averaging around 28°C (83°F). However, this warmth comes with significantly increased rainfall, totaling 521 mm (20.5 in) across 28 days, along with high humidity at 89%. For more detailed information, you can check Ha Long weather in August.
April and September present distinct weather patterns that significantly affect daily life and activities. In April, temperatures range from a comfortable minimum of 14°C (58°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F). The month experiences moderate precipitation of 91 mm (3.6 in) over about 15 days, along with a humidity level of 64%.
In contrast, September tends to be warmer and wetter. The minimum temperature rises to 22°C (72°F), while the maximum reaches 35°C (95°F), generating a higher average of 28°C (83°F). This month also sees a substantial increase in rainfall, totaling 256 mm (10.1 in) over 23 days, and humidity climbs to 82%.
For more details on the specific weather patterns during this month, you can refer to Ha Long weather in September.
April and October present contrasting weather patterns, with both months featuring warm temperatures but differing in humidity and precipitation. In April, temperatures range from a minimum of 14°C (58°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F). The month experiences 91 mm (3.6 in) of precipitation over 15 days and a humidity level of 64%. In contrast, October sees slightly warmer temperatures, starting at a minimum of 17°C (63°F) and reaching up to 34°C (94°F), with an average of 25°C (77°F). However, October is significantly wetter, receiving 204 mm (8.0 in) of rain across 16 days, along with a higher humidity of 77%. For a closer look at the specifics, you can check here: Ha Long weather in October.
In comparing the weather of April and November, it is evident that April tends to be warmer, with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 33°C (91°F), averaging 24°C (75°F). This month also sees higher precipitation levels, with 91 mm (3.6 in) falling over 15 days, contributing to a humidity level of 64%. In contrast, November experiences slightly cooler temperatures, with a minimum of 12°C (54°F) and a maximum of 30°C (86°F), averaging 22°C (73°F). The precipitation in November is significantly less, at 43 mm (1.7 in) over just 9 days, and humidity rises to 72%. For more detailed insights, check out Ha Long weather in November.
In April, the weather tends to be warmer with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 33°C (91°F), creating a pleasant average of 24°C (75°F). This month also experiences significant rainfall, with around 91 mm (3.6 in) of precipitation over 15 days, contributing to a humidity level of 64%.
In contrast, December brings cooler temperatures, with a minimum of 8°C (46°F) and a maximum of 28°C (82°F), leading to a more moderate average of 18°C (66°F). The month sees substantially less rainfall, totaling 31 mm (1.2 in) across just 6 days, although humidity remains slightly higher at 71%.
For a detailed look at December conditions in Ha Long, you can refer to Ha Long weather in December.
April in Ha Long marks a delightful transition into warmer weather, characterized by pleasant temperatures that encourage exploration and outdoor activities. With an average temperature of around 24°C, it’s notably warmer than the cooler months preceding it, yet still comfortable compared to the peak heat of summer. Humidity levels hover at 64%, providing a refreshing feel, even as the city sees an increase in precipitation, with the month averaging 91 mm over approximately 15 rainy days. This makes April a unique time to appreciate the lush, vibrant landscapes that emerge after the showers. For more detailed insights, check out Ha Long Climate.