Last updated: August 28, 2025
December in Hanoi, Vietnam brings a delightful mix of cool and mild weather, with average temperatures hovering around 18°C (65°F). Daytime highs can reach a warm 31°C (87°F), while nights can dip to a cozy 8°C (47°F), offering a refreshing respite. This month sees about 41 mm (1.6 in) of rainfall spread over 7 days, contributing to a humidity level of 71%. Overall, December presents an inviting atmosphere for exploration, blending comfortable temperatures with occasional showers that rejuvenate the vibrant city.
As December rolls into Hanoi, temperatures drop, bringing a crispness to the air that's markedly different from the sultry summer months. With minimums averaging around 8°C (47°F) and averages hovering at 18°C (65°F), the city experiences a refreshing chill. Daytime could still see highs reaching 31°C (87°F), but the cool mornings and evenings invite cozy layers, turning Hanoi into a picturesque winter landscape. This shift sets the stage for a blend of local cultural festivities and a newfound vibrancy in the streets, making December a unique time to explore the city.
In December, Hanoi experiences a brief respite from the heavy rains typical of the summer months, with precipitation averaging just 41 mm (1.6 in) over 7 rainy days. This marks a significant reduction compared to the peak, which occurs in July and August, where rainfall can exceed 250 mm per month. As the city transitions away from the deluge of the wet season, December’s mild precipitation can bring a refreshing coolness, making the atmosphere pleasant for both locals and visitors alike. Although still wetter than early winter months like January and February, December confirms the trend of decreasing rainfall, perfectly setting the stage for the drier months ahead.
As December arrives in Hanoi, the city's humidity levels maintain a relatively moderate profile, resting at 71%. This marks a slight decrease from the preceding months, where the summer peak reached a steamy 90% in July and remained high in August and September. The cooler months of October and November saw a gradual decline, hinting at a transition towards drier conditions. Despite this reduction, December's humidity remains above January's 66%, suggesting that the wetness of the earlier months lingers. This trend reflects Hanoi's tropical climate, where humidity remains a notable characteristic throughout the year, with December offering a brief respite before the cycle begins anew.
In December, Hanoi experiences a notable shift in its UV Index, dropping to 7, classified as high with a burn time of 25 minutes. This is a welcome change after months of extreme UV exposure, particularly from March to September, when the Index consistently peaked at 12 to 13. The transition to December reflects a trend towards milder sun intensity, making it more suitable for outdoor activities. As daylight hours shorten and temperatures cool, it's essential to remain aware of the sun's strength to enjoy the fresh, crisp outdoors safely. For more detailed information on daily fluctuations, check out Hanoi UV Index.
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As the year draws to a close, December in Hanoi shines with a delightful 213 hours of sunshine, marking a radiant end to the year. This month may not boast the highest totals—May takes the crown with 280 hours—but it stands out for its steady warmth, transitioning from the cooler, cloudier months of January and November. Notably, December enjoys more sun than the beginning of the year, surpassing the dreary 130 hours seen in January. The consistent sunshine throughout the latter half of the year, typically ranging from 250 to 280 hours, indicates that while winter blankets the city, the sun continues to peek through, offering moments of brightness to be cherished before welcoming the New Year.
In December, Hanoi experiences a noticeable increase in sunny weather with a 45% chance of sunshine, making it one of the sunniest months of the year. This uplift follows a pattern of rising sunlight as the year winds down; from a relatively gloomy summer when the chance of sun drops to as low as 13% in June and August, there’s a steady climb through the later months. November sets the stage for this transition with a 36% likelihood of sun, but it’s in December that residents and visitors alike can truly bask in brighter days. The pleasant conditions of this month provide a delightful backdrop for exploring the vibrant culture of Hanoi before the winter chill fully sets in.
As December unfolds in Hanoi, the city experiences a return to shorter days, with just 10 hours of daylight. This marks a notable trend: daylight duration reaches its peak in May, with 13 hours, before gradually tapering off as the year winds down. From the brightness of spring to the subtle dimming of winter, Hanoi enjoys a smooth transition of light, with 12 hours in March and April, gradually decreasing to 11 hours in both October and November. The rhythm of the seasons showcases the city's resilience, as locals adapt to the shorter days while still embracing the vibrant culture and charm that persists even as the sun sets earlier.
As December settles over Hanoi, the average wind speed drops to a gentle 1.9 m/s (4 mph), mirroring the lighter breezes typical of the winter months. This slight decline follows a trend established throughout the year, where winds gradually increase to a peak in the earlier months before softening as the year draws to a close. The consistent 2.6 m/s (6 mph) experienced in both March and April indicates a brief flirtation with more robust winds, but by autumn, the pattern clearly shifts to calmer days. November's breeze at 2.2 m/s (5 mph) gently leads into December’s tranquil winds, creating a serene atmosphere that envelops the city and enhances the cozy winter vibe. This cyclical ebb and flow of wind speed not only shapes the weather patterns but also influences the rhythm of daily life in the vibrant streets of Hanoi.
Weather in Hanoi varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hanoi, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, temperatures in Hanoi range from a minimum of 8°C (47°F) to a maximum of 31°C (87°F), with an average of 18°C (65°F). The month sees about 41 mm (1.6 in) of rainfall over 7 days and experiences a humidity level of 71%. In contrast, January maintains similar low and average temperatures, but the maximum drops slightly to 29°C (84°F). Precipitation increases to 58 mm (2.3 in) over 8 days, while humidity decreases to 66%. For more detailed insights, check out Hanoi weather in January.
In December, the weather sees temperatures ranging from a minimum of 8°C (47°F) to a maximum of 31°C (87°F), with an average of 18°C (65°F). Precipitation is consistent, with about 41 mm (1.6 in) over 7 days, and humidity levels hover around 71%. By February, the temperature slightly increases, with a minimum of 9°C (48°F) and an average of 19°C (66°F), while still reaching a peak of 31°C (88°F). The precipitation remains the same at 41 mm (1.6 in) over 7 days, along with the humidity levels. Thus, both months experience fairly similar weather conditions, with only minor variations in temperature. For more details on February weather, you can visit Hanoi weather in February.
In December, the weather features a minimum temperature of 8°C (47°F) and an average of 18°C (65°F), with a maximum reaching 31°C (87°F). The month experiences about 41 mm (1.6 in) of precipitation over 7 days, coupled with a humidity level of 71%. In contrast, March sees warmer temperatures, with a minimum of 14°C (57°F), an average of 22°C (73°F), and a maximum of 34°C (94°F). However, March is wetter, recording 65 mm (2.5 in) of rainfall spread over 14 days, and slightly lower humidity at 69%. For a more detailed look at March weather, you can visit Hanoi weather in March.
December and April in Hanoi exhibit notable differences in weather patterns. In December, temperatures range from a minimum of 8°C (47°F) to a maximum of 31°C (87°F), with an average of 18°C (65°F). The month experiences 41 mm (1.6 in) of precipitation over about 7 days, along with a humidity level of 71%. Conversely, April sees warmer conditions, with temperatures ranging from a minimum of 15°C (59°F) to a sweltering maximum of 36°C (97°F), and an average of 25°C (77°F). However, April also brings significantly more rainfall, totaling 147 mm (5.8 in) over 14 days, along with a lower humidity level of 64%. For more detailed insights, you can explore Hanoi weather in April.
In December, the weather is generally mild, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 31°C (87°F), and an average of 18°C (65°F). The month sees relatively low precipitation at 41 mm (1.6 in) over about 7 days, accompanied by a humidity level of 71%. In contrast, May brings significantly warmer conditions, with temperatures ranging from a minimum of 19°C (67°F) to a scorching maximum of 39°C (103°F) and an average of 28°C (83°F). Rainfall is considerably higher, totaling 188 mm (7.4 in) across 17 days, and humidity rises slightly to 73%. For more details on the weather during this month, check out Hanoi weather in May.
The weather in December and June presents a stark contrast in Hanoi. December features milder temperatures, with minimums around 8°C (47°F) and maximums reaching up to 31°C (87°F), making it a relatively comfortable month with an average temperature of 18°C (65°F). However, it also sees some rainfall, averaging 41 mm over about 7 days, and a humidity level of 71%. In contrast, June is characterized by much warmer conditions, where minimum temperatures start at 23°C (74°F) and can soar up to 40°C (105°F), with an average temperature of 31°C (87°F). Precipitation is also significantly higher in June, totaling 189 mm over roughly 15 days, along with increased humidity at 81%. For a more detailed look at June weather, visit Hanoi weather in June.
When comparing the weather in December and July, it's clear that these months exhibit significant differences. December features milder temperatures, with a minimum of 8°C (47°F) and a maximum of 31°C (87°F), leading to an average temperature of 18°C (65°F). In contrast, July experiences much warmer conditions, with a minimum temperature of 25°C (78°F) and a maximum of 39°C (103°F), resulting in an average of 30°C (86°F). Additionally, July is characterized by heavy rainfall, receiving 260 mm (10.2 in) over 21 days, compared to December's 41 mm (1.6 in) over just 7 days. The humidity is also notably higher in July at 90%, compared to December's 71%. For more details on the specific conditions during this peak summer month, you can check Hanoi weather in July.
In December, the weather is generally milder, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 31°C (87°F) and an average of 18°C (65°F). The month experiences a moderate amount of rainfall, totaling 41 mm (1.6 in) over about 7 days, and humidity levels sit at 71%. In contrast, August is significantly hotter and more humid, with temperatures ranging from a minimum of 24°C (76°F) to a scorching maximum of 39°C (102°F), averaging 29°C (85°F). Rainfall is much heavier during this month, reaching 378 mm (14.9 in) over 22 days, coupled with high humidity at 89%. For more detailed information about the weather conditions, you can check Hanoi weather in August.
December weather is characterized by milder temperatures compared to September, with minimums averaging around 8°C (47°F) and maximums reaching up to 31°C (87°F). In contrast, September experiences much warmer conditions, with minimum temperatures of 21°C (71°F) and highs peaking at 37°C (99°F). Additionally, December has significantly lower precipitation levels, averaging just 41 mm (1.6 in) over 7 days, while September sees a substantial 222 mm (8.7 in) spread across 21 days, contributing to its higher humidity of 82%. For more detailed information about September weather, you can check Hanoi weather in September.
When comparing the weather in December and October, it's evident that December tends to be milder, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 31°C (87°F) and an average of 18°C (65°F). This month also sees less precipitation, totaling 41 mm (1.6 in) over about 7 days, and lower humidity at 71%. In contrast, October is warmer, with temperatures reaching a minimum of 17°C (63°F) and a maximum of 34°C (94°F), averaging 25°C (78°F). However, it experiences significantly more rainfall, accumulating 279 mm (11.0 in) across 16 days, contributing to higher humidity levels of 77%. For a more detailed look at October's weather, you can visit Hanoi weather in October.
In December, the weather in Hanoi tends to be slightly cooler, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 31°C (87°F), resulting in an average of 18°C (65°F). In comparison, November experiences milder conditions, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 33°C (92°F) and an average of 22°C (73°F). November also sees a bit more rainfall, with 48 mm (1.9 in) over 8 days, compared to December's 41 mm (1.6 in) over 7 days. Humidity levels remain relatively similar, with December at 71% and November at 72%. For more detailed information about November weather, you can visit Hanoi weather in November.
As December arrives in Hanoi, the city experiences a noticeable shift in weather compared to other months. With cooler temperatures averaging around 18°C (65°F), residents and visitors can expect refreshing days that occasionally dip to a brisk 8°C (47°F) at night. The moderate 71% humidity adds to the winter chill, contrasting sharply with the sweltering heat of the summer months. Although rainfall occurs on about 7 days, adding up to 41 mm (1.6 in) of precipitation, it tends to be less frequent than in the rainy season. This change in climate not only makes December a more comfortable time to explore the city but also transforms Hanoi's atmosphere into a charming, cozy experience. For more detailed insights, check out Hanoi Climate.