Last updated: August 28, 2025
December in Lang Son, Vietnam presents a cooler climate characterized by a maximum temperature of 28°C (82°F) and a comfortable average of 15°C (60°F). As the month unfolds, temperatures can dip to a minimum of 4°C (40°F), particularly during the night. This month also sees a total precipitation of 51 mm (2.0 in) across approximately 9 wet days, contributing to an average humidity level of 71%. Visitors can expect a blend of crisp air and occasional showers, making it a unique time to explore the region's scenic beauty.
In December, Lang Son, Vietnam, experiences a refreshing shift in temperatures, marking the close of the year. With minimums dipping to 4°C (40°F), the air takes on a crisp quality that contrasts sharply with the warmer months earlier in the year. The average temperature settles around 15°C (60°F), offering a comfortable coolness perfect for outdoor exploration. Interestingly, despite the chill, daytime highs can still reach 28°C (82°F), illustrating a gradual transition that maintains some of the warmth seen in the fall. This month exemplifies the region's dynamic climate, blending invigorating coolness with lingering warmth, making December a delightful time to visit.
In December, Lang Son, Vietnam experiences a notable drop in precipitation, with rainfall amounting to 51 mm (2.0 in) over just nine days. This is a continuation of the diminishing trend observed since the heavy rainy months of August and July, where precipitation peaked at 346 mm (13.6 in) and 243 mm (9.6 in), respectively. Following the highs of the summer months, the transition into December marks a shift towards drier conditions, contrasting with the wetter climate earlier in the year. With rainfall steadily decreasing through November's 39 mm (1.6 in), December's figures suggest a calmer end to the year, as Lang Son eases into the drier winter season.
In Lang Son, Vietnam, December sees a humidity level of 71%, which is consistent with the relatively moderate humidity observed earlier in the year. Following a peak of 90% in July, the humidity generally tapers off as the year progresses. August's high of 89% marks the end of the wet season, leading to a gradual decline that resonates through September and October. This trend showcases a shift from the intense moisture of summer to a more balanced environment as winter approaches. By December, the humidity stabilizes at levels similar to those in January and February, reflecting a comfortable balance amidst the seasonal fluctuations typical of this picturesque northern Vietnamese region.
In Lang Son, Vietnam, the UV Index experiences a notable peak during the summer months, reaching an extreme index of 14 in August, where sun exposure can be dangerous in just 10 minutes. As the year transitions into winter, December sees a decline with a UV Index of 7, categorized as high, allowing for a safer exposure time of 25 minutes before burn risk sets in. The trend highlights the intense sun during the first half of the year, where protection is essential, especially between March and October. As the UV levels drop towards the year’s end, it’s a reminder for residents and visitors alike to remain vigilant against UV exposure, even in winter. For more detailed information, check out Lang Son UV Index.
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In Lang Son, Vietnam, December boasts 234 hours of sunshine, marking a delightful transition into the cooler winter months. This is a slight decline from the peak sunshine experienced in May, with 297 hours, yet it remains significantly vibrant compared to earlier months of the year. As daylight gradually decreases from the summer heights, December offers a pleasant balance, with more sunlight than the initial months, such as January's mere 151 hours. Interestingly, as the year progresses, the trend shows a gradual increase in sunshine hours during spring, peaking in summer before tapering off, allowing December to stand out as a time for clear skies and longer, sunlit afternoons. Visitors can relish the warmth of the sun even in winter, making it an ideal backdrop for exploring this picturesque region.
In Lang Son, Vietnam, December brings a promising 48% chance of sunny weather, making it one of the sunniest months of the year. This is a notable increase compared to previous months, particularly as we move away from the more overcast period of summer, where July and August drop to just 21% and 11% respectively. As autumn transitions into winter, the likelihood of sunshine shows a marked improvement, climbing from 38% in November to December's peak. This trend suggests that if you’re planning a visit during the festive month, you can look forward to a greater likelihood of clear skies, perfect for exploring the stunning landscapes and vibrant culture of the region.
In Lang Son, Vietnam, December marks the return to shorter days, with daylight lasting about 10 hours. This gradual decline in daylight begins after the peak of 13 hours in the summer months of May through July. As the year progresses, the duration of sunlight gently tapers off, transitioning from 12 hours in March and April to 11 hours in October and November. The shift to December’s shorter days not only signals the onset of cooler weather but also reflects a rhythmic pattern of daylight duration throughout the year, inviting residents and visitors alike to embrace the atmospheric charm that the winter months bring.
As December sweeps in Lang Son, the average wind speed settles at a mild 2.8 m/s (6 mph), mirroring the gentle breezes of January. This month marks a subtle shift in the wind's character, wrapping the region in a refreshing coolness as the year draws to a close. Following the higher gusts of October, which peaked at 4.0 m/s (9 mph), the winds become more tranquil, reflecting the patterns of late autumn transitioning into winter. Throughout the year, Lang Son's winds reveal a fascinating cycle: from the brisk breezes of spring and early summer peaking in May, to the calming taper seen from August’s lows. December’s gentle currents invite locals and visitors alike to embrace the serene beauty of the season, as the landscape transforms under the gentle touch of the winter wind.
Weather in Lang Son varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Lang Son, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between December and January, both months exhibit similar temperature ranges with minimum temperatures consistently at 4°C (40°F) and average temperatures around 15°C (60°F for December and 59°F for January). However, January sees a slight decrease in maximum temperatures, with an average high of 27°C (80°F) compared to December's 28°C (82°F). Precipitation increases marginally in January, with 55 mm (2.2 in) over approximately 11 days, compared to December's 51 mm (2.0 in) over 9 days. Notably, January experiences slightly lower humidity at 66% compared to December's 71%. For a more detailed look at the conditions, you can view the full details of Lang Son weather in January.
In December, the weather is generally mild with a minimum temperature of 4°C (40°F) and an average high of 28°C (82°F). With 51 mm (2.0 in) of precipitation spread over 9 days, the month is fairly wet, and humidity remains consistent at 71%. In contrast, February displays slightly warmer conditions, with a minimum temperature of 5°C (41°F) and an average high of 28°C (83°F). The month experiences a bit more rainfall, totaling 57 mm (2.2 in) over 11 days, while humidity stays steady at 71%. For more detailed information on February weather, you can visit Lang Son weather in February.
In December, the weather features cooler temperatures with a minimum of 4°C (40°F) and an average high of 28°C (82°F), while March offers a warmer experience, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 32°C (89°F). December sees less precipitation, totaling 51 mm (2.0 in) across 9 days, compared to March’s 92 mm (3.6 in) over 21 days, indicating a wetter month. Despite the increased rainfall in March, the humidity remains quite similar with December at 71% and March at 69%. For more detailed information on March weather, you can visit Lang Son weather in March.
When comparing the weather in December and April, notable differences emerge in temperature and precipitation. December features a milder temperature range with minimums around 4°C (40°F) and maximums reaching 28°C (82°F), while April boasts significantly warmer conditions, with minimums of 10°C (50°F) and maximums soaring to 34°C (93°F). Additionally, April experiences more rainfall, with 117 mm (4.6 in) of precipitation over 18 days, compared to December's 51 mm (2.0 in) across 9 days. Despite April's higher humidity of 64%, it remains pleasant compared to the cooler and slightly wetter December, which has a humidity level of 71%. For more details on April weather, visit Lang Son weather in April.
December and May offer contrasting weather experiences. In December, temperatures range from a minimum of 4°C (40°F) to a maximum of 28°C (82°F), with an average of 15°C (60°F). The month sees 51 mm (2.0 in) of precipitation over about 9 days, and humidity levels hover around 71%. In stark contrast, May features much warmer weather, with temperatures ranging from a minimum of 15°C (60°F) to a high of 35°C (96°F) and an average of 26°C (78°F). May also brings significantly more rainfall, totaling 179 mm (7.1 in) across approximately 22 days, while humidity slightly increases to 73%. For a more detailed look at the weather during this vibrant month, visit Lang Son weather in May.
In December, the weather tends to be milder, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 28°C (82°F), and an average of 15°C (60°F). The month's precipitation is relatively low at 51 mm (2.0 in), occurring over about 9 days, and humidity levels sit around 71%. In contrast, June experiences significantly warmer conditions, with temperatures ranging from a minimum of 20°C (69°F) to a scorching maximum of 37°C (100°F), and an average of 28°C (83°F). However, it also brings much more rainfall, totaling 235 mm (9.2 in) over approximately 21 days, and increased humidity at around 81%. For a more detailed look at the June weather, you can visit Lang Son weather in June.
In December, Lang Son experiences milder temperatures, with a minimum of 4°C (40°F) and an average of 15°C (60°F), while the maximum can reach 28°C (82°F). The month sees a total precipitation of 51 mm (2.0 in) over approximately 9 days, resulting in a humidity level of 71%. In contrast, July brings much warmer weather, with minimum temperatures around 23°C (73°F), an average of 28°C (82°F), and maximums soaring to 35°C (96°F). Rainfall is significantly higher in July, totaling about 243 mm (9.6 in) over 23 days, coupled with increased humidity of 90%. For more specific details about July, check out Lang Son weather in July.
In December, the weather is notably cooler with temperatures ranging from a minimum of 4°C (40°F) to a comfortable maximum of 28°C (82°F), while the average holds steady at 15°C (60°F). Precipitation is relatively mild at 51 mm (2.0 in) over about 9 days, resulting in a humidity level of 71%. In stark contrast, August sees much warmer conditions, with temperatures soaring from a minimum of 22°C (72°F) to a high of 35°C (96°F), averaging around 27°C (81°F). However, rain is frequent in August, accumulating a significant 346 mm (13.6 in) across 28 days, leading to higher humidity at 89%. This comparison highlights the seasonal shift from the cooler, drier December to the hot, humid August weather typical of the region. For more details, you can check out Lang Son weather in August.
December weather is noticeably cooler than September, with temperatures averaging around 15°C (60°F) compared to September's warmer average of 26°C (80°F). While December sees a maximum temperature of 28°C (82°F), September can reach as high as 34°C (94°F). Additionally, September experiences significantly more rainfall, totaling 198 mm (7.8 in) across 22 days, compared to December's 51 mm (2.0 in) over just 9 days. The humidity is also slightly higher in September at 82%, compared to 71% in December. For more details on September conditions, you can check Lang Son weather in September.
When comparing December and October weather, a noticeable shift can be seen. December experiences milder temperatures, with a minimum of 4°C (40°F) and an average daytime high of 28°C (82°F), while October tends to be warmer, featuring a minimum of 15°C (59°F) and reaching up to 32°C (90°F) on average. Additionally, October is significantly wetter, receiving 170 mm (6.7 in) of rain over 15 days compared to December's 51 mm (2.0 in) across just 9 days. Humidity is also higher in October at 77%, compared to December's 71%. For more details on October's weather, check out Lang Son weather in October.
In comparing the weather of December and November, December exhibits cooler temperatures overall, with a minimum of 4°C (40°F) and an average of 15°C (60°F), compared to November’s milder minimum of 9°C (48°F) and average of 20°C (68°F). While both months experience similar levels of precipitation, December records slightly more at 51 mm (2.0 in) versus November's 39 mm (1.6 in), although both months see rainfall on 9 days. Humidity levels remain comparable, with December at 71% and November at 72%. For further details, you can check Lang Son weather in November.
As December unfolds in Lang Son, the weather presents a delightful shift from the more temperate months. With temperatures dipping to cooler averages around 15°C (60°F), and minimums reaching 4°C (40°F), this month invites a cozy atmosphere, contrasting sharply with the warmer peaks experienced earlier in the year. The 71% humidity coupled with 51 mm of precipitation over 9 days adds a refreshing touch to the air, making it ideal for exploring the region's stunning landscapes. The relatively mild weather provides a perfect backdrop for local festivities, allowing visitors to enjoy the unique charm of Lang Son during this enchanting season. For a comprehensive understanding of Lang Son's climate dynamics, be sure to check out Lang Son Climate.