Last updated: August 28, 2025
In Dien Bien Phu, Vietnam, May ushers in a warm and humid climate, with temperatures soaring up to a sweltering 38°C (101°F) and averaging a comfortable 25°C (77°F). Nights offer a cooler retreat, dropping to a pleasant 15°C (59°F). However, this month also brings considerable precipitation, totaling 85 mm (3.4 in) across approximately 18 rainy days, resulting in a muggy atmosphere with an average humidity level of 68%. Whether you're exploring the rich history or breathtaking landscapes, be prepared for a mix of heat and showers that define this vibrant month in Dien Bien Phu.
In Dien Bien Phu, Vietnam, May marks a significant shift in temperatures as the region transitions into summer. With a minimum temperature of 15°C (59°F) and a maximum soaring to 38°C (101°F), the month showcases warmer days compared to the preceding months. The average temperature reaches a comfortable 25°C (77°F), making it an ideal time for outdoor adventures. As daylight lengthens, the increased warmth and humidity signal the arrival of the hot season, setting the stage for lush landscapes and vibrant local life. This trend of rising temperatures continues into June, hinting at the sweltering summer ahead while still retaining the pleasant warmth that May offers.
May in Dien Bien Phu, Vietnam marks a transition towards the region's wetter season, featuring an average precipitation of 85 mm (about 3.4 in) over 18 days. This shows an increase compared to the previous months, reflecting a notable rise from April's 119 mm. As the rains begin to intensify, May serves as a precursor to the monsoon, with June and July experiencing significantly heavier rainfall, peaking at 383 mm (15.1 in) and 428 mm (16.8 in) respectively. The gradual buildup of rainfall in May, alongside increasing precipitation days, highlights the progressive shift towards the lush, verdant landscapes characteristic of Dien Bien Phu in the coming summer months.
In May, Dien Bien Phu experiences a notable rise in humidity, reaching 68%, a significant increase from the drier conditions of the previous months. This uptick heralds the onset of the hot and sticky summer months ahead, where humidity levels soar—June's figures jump to 79%, and July and August peak at a steamy 91% and 92%, respectively. This trend reflects the transition from the mild climate of early spring to the sweltering heat of summer, suggesting that May serves as a pivotal month where humidity begins its upward trajectory, setting the stage for the tropical discomfort that follows in the summer.
In May, Dien Bien Phu experiences a notable surge in UV intensity, with a UV Index reaching a striking 15 categorized as extreme. This marks one of the highest points in the yearly cycle, closely mirroring the UV Index found in July but stands out from April's twelve and March's thirteen. The burn time in May shortens to just 10 minutes, underscoring the urgent need for sun protection during this peak. As temperatures rise and the sun's rays become increasingly potent, residents and visitors alike should remain vigilant against overexposure. Such trends highlight the importance of understanding seasonal shifts in UV levels for health and safety, as exemplified in the broader context of the year. For more details, visit Dien Bien Phu UV Index.
UV Risk Categories
In Dien Bien Phu, Vietnam, the month of May shines brilliantly with an impressive 317 hours of sunshine, marking it as the sunniest month of the year. This surge in sunlight follows a gradual increase from the previous months, with March and April setting the stage with 298 and 268 hours respectively. The trend showcases a clear ascent into warmer days, particularly as spring transitions into summer. Despite a slight dip during July and August, the overall pattern remains favorable, ensuring ample bright days throughout most of the year. This abundance of sunshine not only enhances the beauty of the landscape but also invites both locals and travelers to embrace the outdoors during this vibrant season.
In Dien Bien Phu, Vietnam, May heralds a shift in weather patterns, showcasing a 37% chance of sunny days, much like the preceding month of April. This trend marks a notable drop from the more promising sunny forecasts seen in March, which boasts a 69% probability. As spring gives way to summer, the likelihood of clear skies diminishes significantly in the following months, with June plunging to a mere 9% chance of sunshine. Therefore, while May offers a decent opportunity for sun, it signals a transition towards a notably cloudier season ahead.
In Dien Bien Phu, Vietnam, the daylight duration showcases a captivating trend as the year unfolds. Starting with about 10 hours of daylight in January, the days gradually lengthen until May, where sunlight peaks at 13 hours. This vibrant month marks a delightful transition into the sun-drenched months of June and July, which maintain this extensive daylight. As summer wanes, daylight begins to recede, offering 12 hours in August and September, before tapering back to 11 hours in October and November. By December, the cycle returns to its starting point of 10 hours, highlighting the natural rhythm of daylight that beautifully characterizes this region throughout the year.
In Dien Bien Phu, May typically enjoys a gentle breeze with an average wind speed of 1.5 m/s (3 mph), consistent with the levels observed in several preceding months. This slight fluctuation in wind speed reflects a stable climate, where the winds remain relatively calm throughout the early year. Notably, March sees a peak with 1.7 m/s (4 mph), hinting at a brief invigorating gust before the weather settles into milder patterns from April onward. As the region transitions into the warmer months of June and July, the winds maintain their calm demeanor, averaging 1.5 m/s (3 mph) and 1.2 m/s (3 mph) respectively. Such conditions create a serene atmosphere, ideal for appreciating the lush landscapes and rich history surrounded by the natural elements of this stunning area.
Weather in Dien Bien Phu varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Dien Bien Phu, focusing on differences in temperature, rainfall, humidity, and UV levels.
The weather in May is significantly warmer and more humid compared to January. In May, temperatures range from a minimum of 15°C (59°F) to a maximum of 38°C (101°F), with an average of 25°C (77°F). This month also sees considerable precipitation, with 85 mm (3.4 in) falling over 18 days, contributing to a humidity level of 68%. In contrast, January is much cooler, with temperatures ranging from a low of 5°C (42°F) to a high of 30°C (86°F) and an average temperature of 16°C (62°F). Precipitation in January amounts to 49 mm (1.9 in) over just 5 days, while the humidity is slightly lower at 63%. For a more detailed look into January weather, you can visit Dien Bien Phu weather in January.
May and February showcase contrasting weather patterns, making each month unique. In February, the temperatures are milder, ranging from a minimum of 6°C (44°F) to a maximum of 31°C (89°F), with an average temperature of 17°C (63°F). The month sees relatively low precipitation at just 29 mm (1.2 in) over 5 days and a humidity level of 65%. In stark contrast, May experiences much warmer conditions, with temperatures ranging from a minimum of 15°C (59°F) to a scorching maximum of 38°C (101°F) and an average of 25°C (77°F). It also has a higher precipitation level of 85 mm (3.4 in) spread over 18 days, accompanied by a humidity of 68%. For more details about February's weather, you can check Dien Bien Phu weather in February.
May and March present distinct weather patterns, with May generally being warmer and more humid. In May, temperatures range from a minimum of 15°C (59°F) to a maximum of 38°C (101°F), with an average temperature of 25°C (77°F). This month often experiences higher humidity at 68% and more precipitation, totaling 85 mm (3.4 in) over 18 days. In contrast, March has a milder climate with temperatures ranging from 12°C (54°F) to 35°C (95°F) and an average of 21°C (70°F). Precipitation during March is less, at 50 mm (2.0 in) spread over 11 days, and the humidity is lower at 57%. For more details about March weather in this region, visit Dien Bien Phu weather in March.
In comparing the weather of April and May, we can see a noticeable increase in temperature, with May recording a minimum of 15°C (59°F) and an average of 25°C (77°F), as opposed to April’s minimum of 10°C (50°F) and average of 23°C (73°F). Although May has a higher maximum temperature of 38°C (101°F) compared to April’s 36°C (97°F), it experiences slightly less precipitation, with 85 mm (3.4 in) over 18 days compared to April's 119 mm (4.7 in) over 14 days. Additionally, May's humidity is notably higher at 68%, contrasting with April’s more moderate level of 50%. For a closer look at April weather patterns, you can visit Dien Bien Phu weather in April.
In comparing the weather between May and June, it's clear that June tends to be more humid and wetter. While May experiences temperatures ranging from a minimum of 15°C (59°F) to a maximum of 38°C (101°F), June sees higher minimum temperatures at 21°C (70°F) but a slightly cooler maximum of 35°C (95°F). Precipitation in June significantly increases to 262 mm (10.3 in) over 26 days, compared to May's 85 mm (3.4 in) over 18 days. Additionally, humidity rises from 68% in May to 79% in June, making the latter month feel more muggy. For more detailed insights on June conditions, check out Dien Bien Phu weather in June.
In comparing the weather between May and July, we see notable differences in temperature and precipitation. May experiences a minimum temperature of 15°C (59°F) and can reach a maximum of 38°C (101°F), while July starts warmer with a minimum of 20°C (69°F) and peaks at a cooler maximum of 34°C (94°F). Precipitation also significantly increases in July, with 383 mm (15.1 in) over 28 days compared to May's 85 mm (3.4 in) across 18 days. Moreover, humidity rises noticeably in July, reaching 91% compared to May's 68%. For more detailed weather insights, you can visit Dien Bien Phu weather in July.
May and August showcase distinct weather patterns with notable differences in temperature, precipitation, and humidity. In May, temperatures range from a minimum of 15°C to a maximum of 38°C, with an average of 25°C; humidity sits at a comfortable 68%. However, the month experiences significant rainfall, totaling 85 mm over 18 days. In contrast, August presents a milder temperature range, with minimums at 20°C and maximums at 33°C, while the average remains similar at 25°C. Yet, August is characterized by a stark increase in precipitation, reaching 428 mm over 29 days and a higher humidity level of 92%. For further details on the climate during this month, you can check Dien Bien Phu weather in August.
In May, temperatures typically range from a minimum of 15°C (59°F) to a maximum of 38°C (101°F), with an average of 25°C (77°F). This month experiences moderate precipitation of about 85 mm (3.4 in) over approximately 18 days, contributing to a humidity level of 68%. Conversely, September presents slightly cooler conditions, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 32°C (91°F) and an average of 24°C (76°F). However, it significantly increases in rainfall, totaling 217 mm (8.5 in) over about 21 days, resulting in a higher humidity of 82%. For more detailed information, you can visit Dien Bien Phu weather in September.
May and October showcase contrasting weather patterns, each with its unique characteristics. In May, temperatures can soar, with a maximum of 38°C (101°F) and an average of 25°C (77°F), making it significantly warmer than October, which has a cooler maximum of 31°C (89°F) and an average temperature of 22°C (72°F). While May sees about 85 mm (3.4 in) of precipitation over 18 days, October experiences slightly more rainfall with 106 mm (4.2 in) across 17 days, leading to higher humidity at 76% compared to May's 68%. For those interested, further details on October weather can be found here: Dien Bien Phu weather in October.
In May, the weather tends to be significantly warmer, with temperatures ranging from a minimum of 15°C (59°F) to a scorching maximum of 38°C (101°F) and an average of 25°C (77°F). This month also experiences considerable rainfall, with 85 mm (3.4 in) of precipitation over 18 days, coupled with a humidity level of 68%. In contrast, November offers a cooler and more pleasant climate, where temperatures range from a minimum of 11°C (52°F) to a maximum of 30°C (86°F), with an average of 20°C (68°F). Precipitation is light in November, totaling just 23 mm (0.9 in) over 5 days, and the humidity slightly increases to 72%. For more details about the weather during this time, you can visit Dien Bien Phu weather in November.
May and December showcase stark contrasts in weather patterns. In May, temperatures range from a minimum of 15°C (59°F) to a sizzling maximum of 38°C (101°F), with an average of 25°C (77°F). The month experiences significant rainfall, averaging 85 mm (3.4 in) over 18 days, resulting in high humidity levels of 68%. In contrast, December presents a much cooler climate, with temperatures dipping to a minimum of 3°C (38°F) and a maximum of 28°C (83°F), averaging 16°C (61°F). Precipitation is notably lower at 25 mm (1.0 in) over just 4 days, yet the humidity remains consistent at 68%. For more insights on weather during this month, check out Dien Bien Phu weather in December.
As May envelops Dien Bien Phu, it offers a unique blend of warmth and moisture, setting it apart from other months. With average temperatures resting at a comfortable 25°C (77°F), residents and visitors experience an inviting climate, but the days can elevate to a maximum of 38°C (101°F), creating a stark contrast between day and night. Precipitation makes its presence known with about 18 days of rain, contributing to the region's lush greenery. Coupled with a humidity level of 68%, this mix of heat and moisture fosters a vibrant atmosphere, both refreshing and invigorating. For a deeper understanding of how the weather patterns evolve throughout the year, be sure to explore Dien Bien Phu Climate.