Last updated: August 28, 2025
May in Mong Cai, Vietnam welcomes warm temperatures, with a maximum reaching 32°C (90°F) and an average of 27°C (81°F), while the minimum dips to a comfortable 19°C (67°F). Travelers should prepare for a humid atmosphere averaging 76%, complemented by a significant precipitation total of 190 mm (7.5 in) over 19 rainy days. This vibrant weather sets the stage for lush landscapes but also encourages visitors to embrace the refreshing rain, making Mong Cai a unique blend of tropical warmth and invigorating showers.
May in Mong Cai, Vietnam heralds the arrival of warmth, with minimum temperatures climbing to a comfortable 19°C (67°F). As spring transitions into summer, the average temperature rises significantly to 27°C (81°F), while daytime peaks can reach a toasty 32°C (90°F). This trend reflects a clear progression from the cooler months, with a noticeable jump from April's mild averages. Overall, May offers a delightful blend of warmth, making it an inviting time for outdoor activities and exploration in this vibrant coastal town. The steady increase in temperatures not only brings a shift in the air but also enhances the lush landscapes and lively atmosphere that define Mong Cai during this season.
May marks a significant transition in precipitation patterns for Mong Cai, Vietnam, as the region experiences a sharp increase in rainfall. With 190 mm (7.5 in) of precipitation over 19 days, May stands out as a month where the rain becomes more frequent and intense, setting the stage for the wetter months ahead. This increase is notable compared to the preceding months, where April brought 86 mm over 14 days. The trend continues into June and July, which see record-high rainfall levels. As the region approaches its peak wet season, May provides a glimpse of the lush landscapes that await, indicating the beginning of a vibrant and dynamic phase in Mong Cai's climate cycle.
May marks a noticeable shift in Mong Cai, Vietnam, as humidity levels rise to an average of 76%, setting the stage for the sultry months ahead. This increase continues a trend observed from the start of the year, where humidity gradually climbed from 66% in January to 71% in April. The transition into May signals the onset of a more tropical climate, foreshadowing the even higher humidity levels that peak during the summer months, reaching 86% in both July and August. This pattern illustrates the region's distinctive shift towards a more humid atmosphere, characterized by the lush vibrancy that defines Mong Cai's enchanting landscape.
In Mong Cai, Vietnam, May continues the trend of extreme UV exposure, reflected in its UV Index of 13, with a burn time of just 10 minutes. This month, along with April and June, marks the peak of intensity, urging residents and visitors alike to take precautionary measures against sun damage. As the summer months approach, the UV Index only rises higher, peaking at 14 in July and August. It's crucial to stay informed and protect your skin while enjoying the warm weather. For more insights, visit the detailed Mong Cai UV Index.
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Mong Cai, Vietnam, basks in a spectacular display of sunshine as May brings an impressive 305 hours of radiant daylight. This remarkable peak not only showcases the increasing warmth of spring but also highlights a broader trend of rising sunlight hours leading into the summer months. From April’s 250 hours to June’s impressive 293 hours, the consistent climb is a vivid reminder of nature's splendor. As the sun begins its ascent, residents and visitors alike can revel in the vibrant scenes of lush landscapes illuminated by bright, golden rays. The sunny days of May set the stage for a lively summer, inviting exploration and celebration of the beautiful outdoors in this charming coastal town.
In Mong Cai, Vietnam, the likelihood of sunny weather in May stands at 32%, a slight dip from the more promising conditions in January and February, which boast chances of 50% and 59%, respectively. As spring progresses into the summer months, the sun's presence becomes less predictable; March and April see significantly lower probabilities of clear skies, dropping to 29% and 25%. Following May, the trend continues with June experiencing just a 13% chance, making late spring a transitional period where sunny days are less assured. Interestingly, as the year moves towards the end, the sun re-emerges with increased likelihoods in October and November, suggesting that while May may offer some glimpses of sunshine, visitors should be prepared for a mix of weather.
As spring transitions into summer, Mong Cai, Vietnam, experiences a noticeable increase in sunlight, with daylight duration peaking at 13 hours in both May and June. Starting from January with just 10 hours, the days gradually lengthen, reaching 12 hours in March and April. This trend of extending daylight not only enhances the vibrant landscapes but also invites outdoor activities and cultural festivities. However, as summer wanes, daylight begins to retreat slightly, with the duration decreasing back to 12 hours in August and reverting to 11 hours by October. This rhythmic change in daylight serves as a reminder of the seasonal transformations that define Mong Cai’s charm throughout the year.
In Mong Cai, Vietnam, May brings a refreshing breeze with an average wind speed of 4.3 m/s (10 mph), marking a noticeable increase compared to the preceding months. After a gentle lull in February and a slight improvement in March and April, May transitions into a more invigorating atmosphere, hinting at the heightened wind patterns that will follow in the summer months. This uptick continues into June, showcasing the region's dynamic climatic shifts, which peak in October at a brisk 6.0 m/s (13 mph). The wind trends thus reflect a fascinating blend of seasonal changes, making May a vibrant precursor to the lively wind-filled summer of Mong Cai.
Weather in Mong Cai varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Mong Cai, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present contrasting weather conditions. In May, temperatures range from a minimum of 19°C (67°F) to a maximum of 32°C (90°F), with an average of 27°C (81°F), creating a warm and humid atmosphere with 76% humidity. The month also sees significant rainfall, totaling 190 mm (7.5 in) across 19 days. In contrast, January tends to be much cooler, with temperatures that range from a minimum of 7°C (45°F) to a maximum of 23°C (73°F) and an average of 16°C (61°F). Rainfall is minimal in January, amounting to 62 mm (2.4 in) over 10 days, and the humidity is slightly lower at 66%. For more detailed information, you can refer to Mong Cai weather in January.
In comparing the weather between May and February, it is evident that May is significantly warmer and more humid. With average temperatures reaching 27°C (81°F) and a maximum of 32°C (90°F), May experiences a considerable increase in heat compared to February, where temperatures average 17°C (63°F) and peak at 24°C (75°F). Additionally, May sees much higher precipitation levels, totaling 190 mm (7.5 in) over 19 days, while February has only 62 mm (2.5 in) across 11 days. The humidity also rises in May to 76%, slightly higher than February's 71%. For further details on February weather, you can visit Mong Cai weather in February.
In comparing the weather of May to that of March, May is notably warmer with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 32°C (90°F), while March experiences a more moderate range with a minimum of 14°C (57°F) and a maximum of 26°C (80°F). Additionally, May sees significantly higher precipitation at 190 mm (7.5 in) across 19 days, compared to March's 84 mm (3.3 in) over 15 days. The humidity in May is slightly higher at 76%, compared to March's 73%. For a more detailed look at March weather, you can visit Mong Cai weather in March.
In comparing the weather of April and May, it is evident that May brings warmer temperatures, with minimums reaching 19°C (67°F) and average highs hitting 32°C (90°F), compared to April's minimum of 16°C (61°F) and maximum of 29°C (85°F). Additionally, May experiences significantly more rainfall, totaling 190 mm (7.5 in) over 19 days, whereas April sees only 86 mm (3.4 in) across 14 days. The increased humidity in May, averaging 76%, also contrasts with April's 71%. For more detailed information on April weather, you can visit Mong Cai weather in April.
May and June showcase a gradual warming trend, with June typically being hotter and more humid. In May, temperatures range from a minimum of 19°C (67°F) to a maximum of 32°C (90°F), averaging around 27°C (81°F). However, precipitation is significant, with 190 mm (7.5 in) occurring over 19 days and humidity at 76%. In contrast, June experiences slightly higher temperatures, with a minimum of 23°C (74°F), an average of 29°C (84°F), and a maximum reaching 33°C (92°F). Precipitation also increases to 265 mm (10.4 in) over 23 days, alongside a slight rise in humidity to 79%. For more detailed information on the weather conditions in June, you can visit Mong Cai weather in June.
May and July present notable differences in weather conditions. In May, temperatures range from a minimum of 19°C (67°F) to a maximum of 32°C (90°F), with an average temperature of 27°C (81°F). The month sees significant rainfall, totaling 190 mm (7.5 in) over 19 days, while humidity levels are around 76%.
In contrast, July experiences warmer temperatures, with a minimum of 26°C (78°F), an average of 29°C (84°F), and a maximum of 33°C (91°F). This month also has a higher precipitation level, reaching 364 mm (14.3 in) over 25 days, coupled with increased humidity at 86%. For a more detailed look at the July weather in this region, check out Mong Cai weather in July.
May and August weather shows distinct differences in temperature and humidity levels. In May, temperatures range from a minimum of 19°C (67°F) to a maximum of 32°C (90°F), with an average of 27°C (81°F) and a relatively high humidity of 76%. However, it also experiences significant rainfall, totaling 190 mm (7.5 in) over 19 rainy days. In contrast, August sees warmer temperatures, with a minimum of 25°C (78°F) and a peak of 33°C (91°F), averaging at 29°C (84°F). The rainfall in August increases dramatically to 469 mm (18.5 in) across 26 days, coupled with higher humidity at 86%. For more detailed insights into weather conditions, you can visit Mong Cai weather in August.
In May, the weather is warm with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 32°C (90°F), averaging around 27°C (81°F). However, it is also a relatively wet month, experiencing precipitation on 19 days and totaling 190 mm (7.5 in), along with a humidity level of 76%. In contrast, September sees slightly higher temperatures with a minimum of 24°C (75°F) and a maximum of 33°C (92°F), averaging 28°C (83°F). This month is even wetter, with 256 mm (10.1 in) of precipitation recorded over 21 days and humidity rising to 78%. For more detailed information on September weather, you can check Mong Cai weather in September.
In May, temperatures range from a minimum of 19°C (67°F) to a maximum of 32°C (90°F), with an average of 27°C (81°F). This month sees a significant amount of rainfall at 190 mm (7.5 in) over 19 rainy days, contributing to a high humidity level of 76%. In contrast, October features slightly cooler temperatures with a minimum of 18°C (65°F) and an average of 25°C (77°F), while still reaching up to 32°C (90°F) on warmer days. Precipitation increases to 206 mm (8.1 in) but occurs over just 14 days, resulting in lower humidity at 72%. For more details, you can check Mong Cai weather in October.
May and November present contrasting weather patterns. In May, temperatures range from a minimum of 19°C (67°F) to a maximum of 32°C (90°F), with an average of 27°C (81°F). The month is characterized by significant rainfall, accumulating to 190 mm (7.5 in) over 19 days, and a high humidity level of 76%. In contrast, November offers milder conditions, with temperatures fluctuating between 12°C (54°F) and 28°C (82°F), averaging at 22°C (71°F). The precipitation is notably lower at 47 mm (1.8 in) over just 8 days, and the humidity decreases slightly to 69%. For more details on the weather in November, you can visit Mong Cai weather in November.
In May, the weather is markedly warmer, with average temperatures ranging from a minimum of 19°C (67°F) to a maximum of 32°C (90°F), accompanied by high humidity levels of 76%. This month also sees significant rainfall, with 190 mm (7.5 in) of precipitation over 19 days, creating a lush and vibrant environment. In contrast, December offers a much cooler climate, with temperatures averaging between 8°C (46°F) and 25°C (78°F), and a reduced average precipitation of 55 mm (2.2 in) spread over just 10 days. The humidity in December is slightly lower at 70%, creating a more comfortable atmosphere. For more detailed information, you can check Mong Cai weather in December.
As May unfolds in Mong Cai, the weather shifts into a warm embrace, making it noticeably hotter and more humid compared to the preceding months. With average temperatures hovering around 27°C (81°F), the higher maximum of 32°C (90°F) can make the days feel particularly steamy, while the nights offer a mild escape. Additionally, May brings increased precipitation, with rain falling approximately 19 days throughout the month, resulting in a lush and vibrant landscape. This combination of heat and humidity sets May apart, creating a tropical ambiance that is palpable in the air. For more detailed insights, check out the complete overview at Mong Cai Climate.