Last updated: August 28, 2025
May in Lang Son, Vietnam is characterized by warm temperatures and considerable humidity, making it an intriguing time to experience the region. With maximum temperatures reaching 35°C (96°F) and an average of 26°C (78°F), outdoor activities can be quite enjoyable, albeit warm. Early mornings or late evenings provide a refreshing escape, especially when temperatures dip to a minimum of 15°C (60°F). However, be prepared for frequent rain, as the area sees an average precipitation of 179 mm (7.1 in) across 22 rainy days throughout the month. With humidity levels at 73%, visitors should stay hydrated and embrace the lush, verdant landscape that May brings to this vibrant city.
In May, Lang Son, Vietnam, experiences a warm transition that signals the onset of summer, with temperatures showcasing a notable rise compared to the preceding months. The minimum temperature hovers at a pleasant 15°C (60°F), while the average climbs to a comfortable 26°C (78°F), peaking at a sizzling 35°C (96°F). This upward trend marks a significant leap from April, creating an inviting atmosphere for outdoor activities and vibrant exploration of the region. As the month progresses, the warmth encourages a lush environment, making May a delightful time to experience Lang Son's natural beauty and cultural richness.
In May, Lang Son, Vietnam, experiences a significant uptick in precipitation, marked by a substantial 179 mm (7.1 in) of rain spread over 22 days. This month's rainfall is a notable increase compared to the previous months, reflecting the region's transition into the wet season. As temperatures rise, May's rain not only nourishes the lush landscapes but also sets the stage for even heavier rains ahead in June and July. With an average of 8.1 rainy days, the weather pattern indicates a shift towards even more frequent showers, culminating in the peak rainfall experienced later in the summer.
In Lang Son, Vietnam, May marks a transition into the heart of the rainy season, with humidity rising to a notable 73%. This increase follows a gradual decline from April's 64%, highlighting the shift towards more moisture-laden air as the summer months approach. May stands out as a month of burgeoning humidity, setting the stage for the sweltering conditions of June, when humidity peaks at a staggering 81%. Overall, this steady upward trend in humidity from January through spring creates a palpable atmosphere, hinting at the lush landscapes that characterize the region as it braces for the summer downpours ahead.
In May, Lang Son, Vietnam, experiences an extreme UV Index of 13, marking it as one of the sunniest months of the year. With a burn time of just 10 minutes, it's crucial for residents and visitors alike to take sun safety seriously, as this trend of high UV levels continues from April and is expected to persist into June. The escalating UV Index from earlier months—starting at a significant 8 in January and peaking to 14 in August—illustrates the region's intense sun exposure, necessitating protective measures during outdoor activities. As the UV Index remains elevated, proper precautions are essential for skin health. For more details on UV levels throughout the year, visit Lang Son UV Index.
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As spring gracefully transitions into summer, May in Lang Son, Vietnam, shines brightly with an impressive 297 hours of sunshine. This is a notable peak in the region's annual sunshine trajectory, following a steady increase from 216 hours in April. The warm embrace of May not only elevates the sunshine count but also marks a vibrant crescendo in the weather patterns, setting the stage for the sun-soaked months ahead. Interestingly, June and July continue to bask in ample sunlight with 288 and 292 hours, respectively. This trend highlights Lang Son's allure during these sun-drenched months, making it an ideal destination for those seeking outdoor adventures or simply wishing to revel in the beauty of nature.
In Lang Son, Vietnam, the likelihood of sunny weather in May sees a modest 24% chance, marking a slight recovery from the preceding April's low of 11%. While this figure is significantly higher than the sunshine probability of March and April, it still pales in comparison to the sunnier months ahead, especially January, which boasts the highest chance at 41%. Interestingly, May's sunshine potential mirrors that of September, suggesting a seasonal rhythm that hints at intermittent sunny spells as the region transitions into the warmer months. As the year progresses, the chances of clear skies typically climb, peaking in the late year with December’s 48%, making May a transitional moment—neither too sunny nor too gloomy.
In Lang Son, Vietnam, daylight duration gradually increases from January to May, showcasing a delightful transition into the vibrant summer months. Starting with just 10 hours of daylight in January, the days lengthen to 13 hours by May, creating an inviting atmosphere for outdoor activities and exploration. This peak daylight continues into June and July, providing ample sunlight during the warmest months. As summer wanes, daylight begins to decrease, with August marking a shift back to 12 hours, followed by a consistent contraction through the fall and winter months, closing the year with 10 hours of daylight in December. This rhythmic ebb and flow of daylight not only enriches the scenery but also influences the rhythm of life in this enchanting region.
In Lang Son, Vietnam, the winds of May mark a notable increase in average speed, reaching 3.3 m/s (7 mph). This uptick follows a generally steady pattern seen in the spring months, where March and April exhibit a moderate range of 2.9 m/s (6 mph) and 3.0 m/s (7 mph), respectively. As the region transitions toward summer, these breezy days of May set the stage for a gradual decline, with the coolest winds of the year typically arriving in the later summer months. Interestingly, a resurgence is evident in October, when winds peak at 4.0 m/s (9 mph), suggesting that Lang Son’s wind patterns reflect the dynamic shifts of its seasons, offering a refreshing contrast to the warmer months ahead. Thus, May’s gentle breezes not only provide a delightful respite but also hint at the changing climatic tapestry throughout the year.
Weather in Lang Son varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Lang Son, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January exhibit contrasting weather patterns, highlighting the transition from mild to warm conditions. In May, temperatures range from a minimum of 15°C (60°F) to a maximum of 35°C (96°F) with an average of 26°C (78°F), making it a hot month. The humidity is relatively high at 73%, and the region experiences significant rainfall, totaling 179 mm (7.1 in) over 22 days. In stark contrast, January offers much cooler temperatures, with a minimum of 4°C (40°F) and a maximum of 27°C (80°F), averaging around 15°C (59°F). With only 55 mm (2.2 in) of precipitation over 11 days and lower humidity at 66%, January provides a drier and more comfortable experience. For more detailed insights, you can check Lang Son weather in January.
May brings significantly warmer temperatures compared to February, with lows around 15°C (60°F) and highs reaching up to 35°C (96°F), averaging 26°C (78°F). In contrast, February's temperatures range from a minimum of 5°C (41°F) to a maximum of 28°C (83°F), averaging only 16°C (61°F). Additionally, May experiences much higher precipitation, with 179 mm (7.1 in) spread over 22 days, compared to February's 57 mm (2.2 in) over just 11 days. The humidity remains similar in both months, with May at 73% and February slightly lower at 71%. For those interested in specific February weather patterns, you can check the detailed information here: Lang Son weather in February.
In comparing the weather between March and May, it’s notable that May experiences significantly higher temperatures, with a minimum of 15°C (60°F) and an average of 26°C (78°F), compared to March's minimum of 9°C (48°F) and an average of 20°C (68°F). May also sees a maximum temperature reaching 35°C (96°F), while March peaks at 32°C (89°F). Additionally, May is much wetter, with 179 mm (7.1 in) of precipitation over 22 days, in contrast to March's 92 mm (3.6 in) across 21 days. Although May has slightly higher humidity at 73%, March remains closely behind at 69%. For a detailed look at March weather, you can visit Lang Son weather in March.
In comparing the weather of May and April, it's evident that May tends to be warmer and more humid. May has a minimum temperature of 15°C (60°F) and averages 26°C (78°F), while April's temperatures range from a minimum of 10°C (50°F) to an average of 22°C (72°F). The maximum temperature in May reaches a high of 35°C (96°F), slightly surpassing April's high of 34°C (93°F). Precipitation also increases in May, with 179 mm (7.1 in) over 22 days, compared to April's 117 mm (4.6 in) over 18 days. Additionally, May's humidity is higher at 73%, compared to April's 64%. For more details about April’s weather, check Lang Son weather in April.
May and June exhibit notable differences in weather conditions. In May, temperatures range from a minimum of 15°C (60°F) to a maximum of 35°C (96°F), with an average of 26°C (78°F). The month experiences significant rainfall, totaling 179 mm (7.1 in) over 22 days, and has a humidity level of 73%. In contrast, June sees warmer temperatures, with a minimum of 20°C (69°F), an average of 28°C (83°F), and a peak of 37°C (100°F). This month also experiences increased precipitation, reaching 235 mm (9.2 in) across 21 days and higher humidity at 81%. For a more detailed look into June's weather, you can visit Lang Son weather in June.
May and July exhibit notable differences in weather patterns. In May, temperatures range from a minimum of 15°C (60°F) to a maximum of 35°C (96°F), with an average of 26°C (78°F). The month experiences significant precipitation, totaling 179 mm (7.1 in) over 22 days, accompanied by a humidity level of 73%. In comparison, July maintains a higher temperature range, with a minimum of 23°C (73°F) and an average of 28°C (82°F), while still reaching a maximum of 35°C (96°F). Precipitation increases in July to 243 mm (9.6 in) over 23 days, and the humidity continues to rise to 90%. Overall, July is not only warmer but also wetter and more humid than May, creating a noticeably different climate. For more details, check Lang Son weather in July.
In May, the weather is characterized by milder temperatures, with a minimum of 15°C (60°F) and an average of 26°C (78°F), while August offers warmer nights, starting at a minimum of 22°C (72°F) and maintaining a similar average temperature of 27°C (81°F). However, August experiences significantly higher humidity levels at 89% compared to May's 73%. Additionally, August sees almost double the precipitation, with 346 mm (13.6 in) over 28 days, compared to May's 179 mm (7.1 in) across 22 days. For more details, you can check Lang Son weather in August.
In comparing the weather of May and September, both months exhibit similar average temperatures around 26°C (78°F), but there are notable differences in other aspects. May experiences a lower minimum temperature of 15°C (60°F) compared to September's 19°C (67°F), indicating that September nights tend to feel warmer. Additionally, both months see a maximum temperature that peaks at about 34°C (94°F) to 35°C (96°F), suggesting consistent warmth. However, September records slightly higher precipitation levels at 198 mm (7.8 in) over 22 days, compared to May's 179 mm (7.1 in) over the same number of days, making September a wetter month with higher humidity at 82%. For more specific details on September weather, you can refer to Lang Son weather in September.
May and October both present warm weather, but with distinct characteristics. In May, temperatures range from a minimum of 15°C (60°F) to a maximum of 35°C (96°F), with an average of 26°C (78°F) and a notable 179 mm (7.1 in) of precipitation over 22 days. This month tends to be quite humid, averaging around 73%. In contrast, October offers slightly cooler temperatures, averaging 23°C (73°F) and peaking at 32°C (90°F), while still maintaining a minimum of 15°C (59°F). The month sees around 170 mm (6.7 in) of rainfall over 15 days and has a higher humidity level of 77%. For more specific details on this month, you can check Lang Son weather in October.
May and November present contrasting weather patterns. In May, temperatures range significantly from a minimum of 15°C (60°F) to a scorching average of 26°C (78°F) and can peak at 35°C (96°F). This month also experiences high humidity at 73% and considerable rainfall, totaling 179 mm (7.1 in) over approximately 22 days, making it quite wet. In contrast, November sees milder temperatures, with a minimum of 9°C (48°F) and an average of 20°C (68°F), and maximums reaching 30°C (86°F). The month is much drier, with only 39 mm (1.6 in) of precipitation across 9 days; humidity remains similar at 72%. For more detailed information on November weather, you can check Lang Son weather in November.
May and December present contrasting weather conditions. In May, temperatures range from a mild 15°C (60°F) at night to a scorching 35°C (96°F) during the day, with an average of 26°C (78°F). This month experiences significant rainfall, accumulating 179 mm (7.1 in) over 22 days, alongside a high humidity level of 73%. In contrast, December features much cooler temperatures, with a minimum of 4°C (40°F) and a maximum of 28°C (82°F), averaging at 15°C (60°F). Precipitation drops to just 51 mm (2.0 in) over 9 days, and humidity stabilizes around 71%. For more specific insights on December weather, you can visit Lang Son weather in December.
As May unfolds in Lang Son, the warm temperatures and high humidity create a vibrant atmosphere that starkly contrasts with the cooler, dry spells of previous months. With maximum temperatures reaching around 35°C and an average of 26°C, outdoor activities can be quite enjoyable, albeit with a higher chance of rainfall—spanning about 22 days—that refreshes the landscape. This transition into the wet season brings an average precipitation of 179 mm, marking a shift from the drier early year. For those planning their visit, understanding this distinct change is key to an enjoyable experience. For more insights on what to expect, check out Lang Son Climate.