Last updated: August 28, 2025
In January, Ha Long, Vietnam, offers a unique blend of moderate temperatures and refreshing humidity. With a maximum of 26°C (80°F) and an average of 18°C (64°F), visitors can enjoy mild days that are perfect for exploring the stunning landscapes. However, the month can see a minimum dip to 8°C (46°F), so layering is advisable. Rainfall is limited, with only 28 mm (1.1 in) of precipitation spread across five days, allowing for ample opportunities to soak in the breathtaking vistas. The humidity level stands at 66%, creating a pleasant atmosphere that enhances the beauty of this captivating destination.
In January, Ha Long, Vietnam, experiences a refreshing climate, with temperatures ranging from a brisk 8°C (46°F) at night to a comfortable 26°C (80°F) during the day, averaging around 18°C (64°F). This month marks the beginning of the year with cool breezes, making it ideal for exploring the region's stunning limestone karsts and emerald waters. As winter transitions into spring, February brings only a slight increase in nighttime temperatures, dropping to 7°C (45°F), yet the average remains stable at 18°C (65°F). By March, the warmth begins to increase significantly, with minimums rising to 14°C (57°F) and daytime highs soaring up to 31°C (88°F), signaling a shift towards the hotter months ahead. The gradual warming trend continues into April and May, with average temperatures climbing to 24°C (75°F) and 27°C (81°F), respectively, inviting visitors to enjoy longer, sun-filled days. As summer approaches, June through August showcases the region’s peak warmth, with evening lows around 23-25°C (74-77°F) and maximum temperatures nudging towards the 36°C (97°F) mark, perfect for indulging in water-based activities. By September and October, temperatures start to dip again, but still retain a pleasant warmth, offering a perfect backdrop for travelers seeking both adventure and relaxation.
In January, Ha Long experiences a relatively dry start to the year, with just 28 mm (1.1 in) of precipitation spread over 5 days. This modest rainfall serves as a precursor to the wetter months that follow; by February, precipitation increases slightly to 36 mm (1.4 in), and the number of rainy days rises to 7. The spring months see a gradual uptick, culminating in April when rainfall reaches 91 mm (3.6 in) over another 15 days. The onset of summer brings significant moisture, peaking in August with an astounding 521 mm (20.5 in) across 28 days, marking the wettest period of the year. As the landscape transitions into autumn, the rainfall starts to decrease, tapering back to 43 mm (1.7 in) in November. This trend illustrates Ha Long's climate pattern, where a drier January paves the way for increasingly wet months, leading to the impressive monsoon season that defines its summer.
In Ha Long, Vietnam, January experiences a moderate humidity level of 66%, setting the stage for the gradual increase in moisture that characterizes the following months. As winter gives way to spring, humidity rises to 71% in February and slightly dips to 69% in March. This fluctuation continues into April with a drop to 64%, but by May, the humidity climbs again, peaking at a steamy 81% in June. The summer months see the highest levels, with July and August reaching an impressive 90% and 89%, respectively. As the year progresses towards autumn, humidity begins to taper off, settling at 82% in September, 77% in October, and 71% in December. This trend highlights Ha Long’s tropical climate, where humidity reigns supreme during the warmer months, creating a lush and vibrant environment.
In January, Ha Long, Vietnam experiences a very high UV Index of 8, which means sun safety is crucial as unprotected skin can burn in just 15 minutes. This trend of high UV exposure continues into February, with the index rising to 10, remaining in the very high category. As we move into March and April, prepare for an intense increase, with the UV Index soaring to 12 and 13 respectively, entering the extreme range, where just 10 minutes of sun exposure can lead to burns. This extreme UV level persists through the summer months of May to September, before tapering off in October and November. December provides a slight reprieve with a high UV Index of 7, allowing for longer exposure times of 25 minutes. With such fluctuations, it's essential to keep informed and protect your skin while enjoying the beautiful beaches of Ha Long. For more details, visit Ha Long UV Index.
UV Risk Categories
January in Ha Long, Vietnam, welcomes the year with a moderate embrace of sunshine, offering around 170 hours of bright moments. While the initial chill of winter still lingers, the days gradually lengthen as the month transitions into February, where delightful rays increase to 217 hours. This upward trend continues into March, with 201 hours basking in sweet anticipation for the warmer days ahead. As spring unfolds, Ha Long shines brilliantly in April, showcasing 248 hours of sun, hinting at the vibrant summer ahead. May, with 307 hours of sunshine, marks the peak of radiance, laying the foundation for the summer months. Even as June and July sustain the sunny spirit with 297 and 299 hours respectively, August begins to dip slightly with 266 hours. The gentle descent continues into September and October, where 286 and 259 hours reflect a subtle transition towards tranquility. By November and December, the days remain pleasantly sunny, offering 252 and 238 hours, inviting visitors to enjoy Ha Long's enchanting beauty amidst the shifting light. Thus, January's modest sunshine serves as the opening chapter to a vibrant seasonal story filled with increasing brightness and warmth.
In Ha Long, Vietnam, January presents a relatively moderate chance of sunny weather, with a 43% likelihood of sunshine. This marks it as a transition month, where the chances gradually start to improve compared to the following months. As February rolls in with 51% sunshine probability, you can begin to feel the shift towards brighter days, leading to a peak in sun exposure by December at a healthy 53%. However, after these initial winter months, sunshine dwindles again by spring and summer, hitting a low of just 14% in June. Thus, while January is far from the sunniest, it signals the gradual return of clearer skies, making it an ideal time for travelers who enjoy mild, yet promising weather.
In Ha Long, Vietnam, January brings approximately 10 hours of daylight, marking the beginning of a gradual increase as the year unfolds. By February, the sunshine extends to 11 hours, inviting more opportunities to explore the stunning landscapes. As spring approaches in March, daylight reaches a pleasant 12 hours, remaining consistent through April. The long days peak in the summer months of May through July, where residents and tourists enjoy a generous 13 hours of sunlight, perfect for beach outings and outdoor adventures. As the year transitions into the cooler months, daylight gradually tapers off, returning to 12 hours in August and September, before settling back to 11 hours in October and November, and once again to 10 hours by December. This rhythmic pattern of daylight hours beautifully complements the vibrant seasonal changes, enhancing the charm of Ha Long throughout the year.
In January, Ha Long experiences a gentle breeze with an average wind speed of 2.9 m/s (6 mph), setting a serene tone for the month. This moderate wind continues into February at 2.5 m/s, offering a calm atmosphere perfect for exploring the stunning limestone islands and emerald waters. As spring approaches in March, the wind picks up slightly again to 2.9 m/s, maintaining that pleasant ambiance. By April, the winds begin to strengthen further, averaging 3.0 m/s, heralding the arrival of warmer days. Throughout May and June, wind speeds peak at 3.7 m/s (8 mph), contributing to the vibrant nautical activities in the bay. The summer months see a slight dip in windiness, with July and August returning to a softer 2.7 m/s. As autumn arrives in September, the winds mellow further to 2.2 m/s, before picking up again to 4.0 m/s in October, invigorating the air just in time for the bustling tourist season. November and December bring a return to the milder breezes, averaging 3.0 m/s and 2.7 m/s, respectively, creating a cozy atmosphere as the year winds down. This pattern reveals a dynamic yet soothing climatic rhythm, with Ha Long’s winds enhancing its enchanting allure throughout the year.
Weather in Ha Long varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Ha Long, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, the weather features mild temperatures with a minimum of 8°C (46°F), an average of 18°C (64°F), and a maximum reaching 26°C (80°F). This month sees about 28 mm (1.1 in) of precipitation over approximately 5 days, accompanied by a humidity level of 66%. In contrast, February offers slightly cooler nights with a minimum temperature of 7°C (45°F) while maintaining a similar average of 18°C (65°F) and a peak temperature of 27°C (80°F). The month experiences increased precipitation at 36 mm (1.4 in) spread over 7 days, along with higher humidity at 71%. For more detailed information, visit Ha Long weather in February.
In January, the weather typically features a milder temperature range with a minimum of 8°C (46°F), an average of 18°C (64°F), and a maximum of 26°C (80°F). The month experiences relatively low precipitation at 28 mm (1.1 in) over approximately five days, contributing to a humidity level of 66%.
By contrast, March sees a significant rise in temperatures, with minimums of 14°C (57°F), averages of 21°C (71°F), and maximums reaching 31°C (88°F). However, it also brings increased precipitation, totaling 52 mm (2.0 in) over about 15 days, and slightly higher humidity at 69%. This shift marks the transition into warmer weather, making March quite different from the cooler January climate. For more details on March weather in this region, check out Ha Long weather in March.
In January, the weather is milder, with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 26°C (80°F), accompanied by moderate humidity at 66%. The month experiences less precipitation, totaling 28 mm (1.1 in) over about 5 days. In contrast, April sees a notable increase in warmth, with temperatures spanning from 14°C (58°F) at night to a high of 33°C (91°F) during the day. However, it is also a wetter month, receiving 91 mm (3.6 in) of rainfall across 15 days. The humidity remains relatively stable at 64%. For more specific details, you can check Ha Long weather in April.
In comparing the weather between January and May, January enjoys milder temperatures, with a minimum of 8°C (46°F) and an average of 18°C (64°F), peaking at 26°C (80°F). The month sees relatively low precipitation of 28 mm (1.1 in) over just 5 days, alongside a humidity level of 66%. Conversely, May experiences significantly warmer conditions, with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 36°C (98°F), and an average of 27°C (81°F). However, it is also a wetter month, with total precipitation reaching 184 mm (7.2 in) over 19 days and a higher humidity of 73%. For more detailed information about May weather, please visit Ha Long weather in May.
The weather in January presents mild temperatures, with minimums around 8°C (46°F) and maximums reaching up to 26°C (80°F), creating a pleasant average of 18°C (64°F). Light precipitation of 28 mm (1.1 in) falls over just five days, resulting in a relatively dry and comfortable atmosphere with a humidity level of 66%. In stark contrast, June brings much warmer conditions, with temperatures soaring from a minimum of 23°C (74°F) to a scorching maximum of 38°C (100°F), averaging 30°C (86°F). This month also experiences significantly higher rainfall, totaling 240 mm (9.4 in) over 20 days, coupled with increased humidity at 81%. For more details on the distinct conditions during this month, see Ha Long weather in June.
January and July present stark contrasts in weather conditions. In January, temperatures are milder, with a minimum of 8°C (46°F), an average of 18°C (64°F), and a maximum of 26°C (80°F). The month experiences relatively low precipitation, totaling 28 mm (1.1 inches) over just 5 days, alongside a moderate humidity level of 66%. In contrast, July brings significantly warmer temperatures, with a minimum of 25°C (77°F), an average of 29°C (85°F), and highs reaching 36°C (98°F). This month is also characterized by much heavier rainfall, totaling 287 mm (11.3 inches) across 24 days, and higher humidity at 90%. For more detailed information, you can explore Ha Long weather in July.
January and August exhibit stark contrasts in weather conditions. January typically sees milder temperatures with a minimum of 8°C (46°F), an average of 18°C (64°F), and a maximum of 26°C (80°F). The month experiences relatively low precipitation at 28 mm (1.1 in) spread over about 5 days, along with a humidity level of 66%. In contrast, August is characterized by significantly warmer temperatures, with a minimum of 24°C (76°F), an average of 28°C (83°F), and a peak of 36°C (97°F). It also brings much higher precipitation, totaling 521 mm (20.5 in) over 28 days, and an increased humidity level of 89%. For a closer look at August weather specifics, you can find more information here: Ha Long weather in August.
In January, the weather is much cooler with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 26°C (80°F), and an average of 18°C (64°F). The month sees relatively low precipitation at 28 mm (1.1 in) over about 5 days, along with humidity levels around 66%. In contrast, September experiences significantly warmer temperatures, with a minimum of 22°C (72°F) and reaching highs of 35°C (95°F), averaging 28°C (83°F). However, it is also a notably wetter month, with 256 mm (10.1 in) of rain spread across 23 days and higher humidity at 82%. For more detailed insights, you can visit Ha Long weather in September.
In January, the weather is generally mild with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 26°C (80°F) and an average of 18°C (64°F). The month experiences relatively low precipitation of 28 mm (1.1 in) over just 5 days, and humidity levels stand at 66%. In contrast, October sees significantly warmer temperatures, with a minimum of 17°C (63°F), an average of 25°C (77°F), and a maximum reaching 34°C (94°F). However, the month is much wetter, receiving 204 mm (8.0 in) of rainfall spread over 16 days, along with higher humidity at 77%. For more detailed insights into the October weather, you can check Ha Long weather in October.
In comparing the weather between January and November, January generally presents cooler temperatures, with minimums around 8°C (46°F) and maximums peaking at 26°C (80°F). In contrast, November experiences milder conditions, with minimum temperatures of 12°C (54°F) and maximums reaching as high as 30°C (86°F). Additionally, November sees more precipitation, averaging 43 mm (1.7 in) over about 9 days, compared to January's 28 mm (1.1 in) over just 5 days. Humidity levels are also slightly higher in November at 72%, compared to 66% in January. For a detailed look at the climate specifics, you can visit Ha Long weather in November.
In December, the weather in Ha Long is characterized by slightly higher maximum temperatures compared to January, reaching up to 28°C (82°F) against January's peak of 26°C (80°F). Both months have the same minimum temperature of 8°C (46°F) and average temperatures that remain comfortable at 18°C (66°F). However, December experiences a bit more precipitation, totaling 31 mm (1.2 in) over 6 days, while January sees 28 mm (1.1 in) spread across 5 days, making January slightly drier. Furthermore, December's humidity is higher at 71%, compared to January's 66%. For more insights into the December weather, you can visit Ha Long weather in December.
January in Ha Long offers a refreshing retreat as it ushers in cooler temperatures compared to the warmer months. With average highs around 18°C, this month stands out for its mild vibes, while the humidity remains moderately comfortable at 66%. While you might encounter a few rainy days, with a total precipitation of 28 mm, it's a delightful time for exploration without the sweltering heat or heavy tourist crowds. For those seeking to understand the nuances of Ha Long's climate, exploring the details can enhance your travel experience—check out Ha Long Climate for more insights.