Last updated: August 28, 2025
In January, Hanoi experiences a mild climate characterized by an average temperature of 18°C (65°F), with daily highs reaching up to 29°C (84°F) and lows dipping to 8°C (46°F). This month, the city receives approximately 58 mm (2.3 in) of rainfall over 8 days, contributing to a relative humidity of 66%. Visitors can anticipate a refreshing atmosphere that balances cool mornings and warmer afternoons, making it an ideal time to explore the vibrant culture and scenic landscapes of Vietnam's capital.
In Hanoi, January brings a delightful blend of cool and mild weather, making it one of the most pleasant months to visit this bustling city. With nighttime temperatures dipping to a brisk 8°C (46°F) and daytime averages around 18°C (65°F), visitors can enjoy the crisp air while exploring the stunning scenery. The temperature can peak at 29°C (84°F), offering a taste of warmth amidst the fresh winter air. As the month progresses towards February, temperatures gradually climb, hinting at the imminent transition into the warmer months ahead. However, January's mix of cooler nights and moderate days creates an ideal atmosphere for strolling through Hanoi's vibrant streets, sipping on hot coffee, and savoring local cuisine.
In January, Hanoi experiences a modest precipitation of 58 mm (2.3 in) over the course of 8 days, marking the beginning of the year with relatively light rainfall. This sets the stage for a gradual increase in moisture as winter gives way to early spring. In contrast to the heavier rains of the following months, January's precipitation is a mere prelude to the wet season that peaks from July to August, where rainfall can soar to an impressive 378 mm (14.9 in). The trend reflects a clear progression towards higher precipitation levels, indicating that while January may be relatively dry, the city's climate soon transitions into a much wetter pattern, emphasizing the seasonal contrasts that define Hanoi's weather throughout the year.
In January, Hanoi experiences a moderate humidity level of 66%, setting the stage for a gradually increasing trend as the year progresses. As the weeks pass, February sees a rise to 71%, continuing the upward trajectory towards the 69% mark in March. By April, humidity dips slightly to 64%, but the warmth of May returns the level to a higher 73%. The humidity continues to escalate dramatically from June onwards, peaking at a sweltering 90% in July. This high level remains almost unchanged into August, creating a humid atmosphere that characterizes the summer months. As the year moves into September, humidity begins to decline to 82%, with gradual decreases continuing into autumn—dropping to 77% in October and stabilizing around 72% to 71% during November and December. Overall, January serves as the starting point of this humid ascent, foreshadowing the sticky summer ahead for residents and visitors alike.
In January, Hanoi experiences a UV Index of 8, categorized as very high, with a burn time of just 15 minutes. This month marks the beginning of a trend where the UV Index steadily increases, peaking at UV Index 13 in May and August, both categorized as extreme. The intensity remains high through the summer months, with consistent burn times of only 10 minutes. As the year progresses into the fall, the UV Index gradually decreases, culminating in a 7 in December, providing some respite with a longer burn time of 25 minutes. It's essential to stay informed and protected during these months of high UV exposure—learn more at Hanoi UV Index.
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In January, Hanoi welcomes the new year with a modest 130 hours of sunshine, setting a quiet stage for the months ahead. As winter fades and spring approaches, sunshine gradually increases, peaking in May with an impressive 280 hours. This trend continues, showcasing the vibrant warmth of summer, with July and August closely trailing at 274 and 259 hours, respectively. As the year progresses, sunshine starts to wane, with October offering 235 hours and December closing the year with 213 hours. This rhythmic dance of light not only reflects the changing seasons but also enriches the cultural tapestry of Hanoi, inviting locals and visitors alike to bask in its embrace.
January in Hanoi, Vietnam, brings a 32% chance of sunny weather, marking it as one of the more favorable winter months for sunshine. Following closely, February also boasts a 31% likelihood, maintaining a similar trend. However, as spring approaches, the chances of sunny days decrease significantly, dipping to 18% in March and April. Interestingly, the chances rise again in the late year, peaking in December at 45%, suggesting that while January offers a pleasant start to the year, visitors can expect fluctuations in sunny weather as the seasons change. Overall, January presents an inviting opportunity for sunshine seekers before the city's weather transitions toward a cooler, cloudier phase.
In Hanoi, Vietnam, the daylight duration experiences a remarkable transformation throughout the year. January kicks off with a modest 10 hours of daylight, gradually increasing to 12 hours by March and April, creating a refreshing sense of springtime. As May arrives, the days stretch to their peak, offering a generous 13 hours of daylight that continues through the summer months of June and July. As autumn approaches, the daylight begins to taper off, dropping back to 12 hours in August and September. The transition into the colder months sees daylight dwindle again, with October and November each providing 11 hours, before culminating in December and January with a return to 10 hours. This cyclical pattern not only reflects the rhythm of the seasons but also enhances the rich cultural and social tapestry of life in Hanoi.
As January rolls around in Hanoi, the city experiences a gentle breeze with an average wind speed of 1.9 m/s (4 mph). This moderate wind sets the stage for the typically cool and crisp winter atmosphere, making it a pleasant time for outdoor exploration. Notably, the wind speed begins to pick up slightly as the months progress into February, reaching 2.0 m/s, and then significantly increases to 2.6 m/s in March and April. The gradual rise in wind intensity hints at a shift toward the warmth of spring, while the winds start to mellow again by mid-year, dipping to 1.7 m/s in August, before recovering in the fall. This natural ebb and flow of wind speed not only enhances the seasonal charm but also plays a subtle role in shaping Hanoi's unique climate throughout the year.
Weather in Hanoi varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Hanoi, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit a gradual warming trend in their weather patterns. In January, temperatures range from a minimum of 8°C (46°F) to a maximum of 29°C (84°F) with an average temperature of 18°C (65°F). The month experiences 58 mm (2.3 in) of precipitation over 8 days, accompanied by a humidity level of 66%. By contrast, February sees a slight increase in temperatures, with minimums at 9°C (48°F), average temperatures rising to 19°C (66°F), and maximums reaching 31°C (88°F). Precipitation decreases to 41 mm (1.6 in) over 7 days, and humidity rises to 71%. Overall, February is typically warmer and slightly more humid than January. For more details, check Hanoi weather in February.
In comparing the weather of January and March, we see a noticeable increase in temperatures and humidity. January features a minimum temperature of 8°C (46°F) and an average of 18°C (65°F), while by March, the minimum rises to 14°C (57°F) with an average of 22°C (73°F). Max temperatures also climb significantly, from 29°C (84°F) in January to a sizzling 34°C (94°F) in March. Although precipitation is slightly higher in March at 65 mm (2.5 in) over 14 days compared to January's 58 mm (2.3 in) over 8 days, the humidity remains relatively similar, with January at 66% and March at 69%. For more details on the weather trends, check this link: Hanoi weather in March.
In January, the weather is characterized by milder temperatures, with a minimum of 8°C (46°F) and an average of 18°C (65°F), peaking at a maximum of 29°C (84°F). The month experiences relatively low precipitation, totaling 58 mm (2.3 in) over 8 days, along with a humidity level of 66%. In contrast, April brings warmer conditions, with minimum temperatures rising to 15°C (59°F) and averages reaching 25°C (77°F), culminating in maximums of 36°C (97°F). This month also sees a significant increase in rainfall, with 147 mm (5.8 in) spread across 14 days, and slightly lower humidity at 64%. For more detailed insights into what to expect, check out Hanoi weather in April.
January and May present distinct differences in weather patterns. In January, temperatures range from a mild minimum of 8°C (46°F) to a maximum of 29°C (84°F), with an average of 18°C (65°F). During this month, Hanoi experiences precipitation of 58 mm (2.3 in) over about 8 days, accompanied by a humidity level of 66%. In contrast, May sees significantly warmer temperatures, with a minimum of 19°C (67°F) and soaring highs reaching up to 39°C (103°F), averaging 28°C (83°F). Additionally, May is much wetter, with 188 mm (7.4 in) of rain falling over 17 days and a higher humidity of 73%. For more specific details on Hanoi's weather during this month, refer to Hanoi weather in May.
In January, the weather is relatively mild with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 29°C (84°F), and an average of 18°C (65°F). The month experiences around 58 mm (2.3 in) of precipitation over approximately 8 days, coupled with a humidity level of 66%. In contrast, June is considerably hotter, with temperatures starting at a minimum of 23°C (74°F) and soaring to a maximum of 40°C (105°F), averaging 31°C (87°F). This month sees significantly more rainfall, totaling 189 mm (7.4 in) over 15 days, and the humidity rises to 81%. For more detailed insights into the climatic conditions, check out this link: Hanoi weather in June.
In January, the weather in Hanoi is relatively mild, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 29°C (84°F) and an average of 18°C (65°F). Precipitation is modest, averaging 58 mm (2.3 in) over about 8 days, and humidity sits around 66%. In contrast, July brings a dramatic shift, with temperatures soaring to a minimum of 25°C (78°F) and reaching up to 39°C (103°F), averaging 30°C (86°F). Rainfall significantly increases, totaling 260 mm (10.2 in) across approximately 21 days, and humidity skyrockets to 90%. For a detailed look at July weather, you can visit Hanoi weather in July.
In January, the weather is relatively mild, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 29°C (84°F) and an average of 18°C (65°F). With 58 mm (2.3 in) of precipitation over approximately 8 days, humidity hovers around 66%, creating a comfortable atmosphere. In stark contrast, August experiences a significant uptick in heat and humidity; temperatures soar from a minimum of 24°C (76°F) to a scorching maximum of 39°C (102°F), with an average of 29°C (85°F). The month is characterized by heavy rainfall, totaling 378 mm (14.9 in) across 22 days and a much higher humidity level of 89%. For more details, check out Hanoi weather in August.
In January, the weather tends to be milder, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 29°C (84°F) and an average of 18°C (65°F). The precipitation is relatively low at 58 mm (2.3 in) over about 8 days, accompanied by a humidity level of 66%. In contrast, September brings a significant increase in warmth and moisture, with temperatures ranging from a minimum of 21°C (71°F) to a maximum of 37°C (99°F), averaging 28°C (83°F). Rainfall becomes much more pronounced, reaching 222 mm (8.7 in) over 21 days, and humidity rises to 82%. For a more detailed look at September’s climate, check out Hanoi weather in September.
When comparing the weather in January and October, notable differences emerge. January typically experiences milder temperatures, with a minimum of 8°C (46°F) and a maximum of 29°C (84°F), while October sees warmer conditions, with minimums of 17°C (63°F) and maximums reaching 34°C (94°F). Additionally, October is significantly wetter, averaging 279 mm (11.0 in) of precipitation over 16 days, compared to January's 58 mm (2.3 in) over just 8 days. Humidity levels also rise in October, averaging 77% compared to January's 66%. For more details, you can explore Hanoi weather in October.
In January, the weather is relatively cooler with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 29°C (84°F), while November enjoys milder temperatures, with lows of 14°C (57°F) and highs reaching 33°C (92°F). January experiences slightly more precipitation, with 58 mm (2.3 in) falling over 8 days, compared to November's 48 mm (1.9 in) during the same number of days. Additionally, humidity levels are higher in November at 72%, compared to January's 66%, giving November a warmer and more humid feel overall. For a detailed look at the weather patterns, you can visit Hanoi weather in November.
In comparison to January, December exhibits slightly warmer maximum temperatures, peaking at 31°C (87°F) compared to January's 29°C (84°F). Both months share similar minimum temperatures and average readings around 18°C (65°F). However, December experiences less precipitation overall, with 41 mm (1.6 in) falling over 7 days, compared to 58 mm (2.3 in) over 8 days in January. Additionally, December has a higher humidity level at 71%, making it feel a bit more humid than January's 66%. For more details, you can check out Hanoi weather in December.
January in Hanoi ushers in a cooler, more temperate climate compared to the sweltering heat of summer months. With temperatures hovering around a pleasant average of 18°C (65°F), this time of year provides a refreshing escape, though it can dip to chilly lows. January also sees increased humidity and light precipitation, requiring an umbrella on about 8 days of the month. This unique weather pattern creates a serene atmosphere, ideal for exploring the city’s vibrant culture and stunning landscapes. For a deeper understanding of how January fits into the broader climatic trends, visit Hanoi Climate.