Last updated: August 28, 2025
In Son La, Vietnam, May ushers in a vibrant transition marked by a maximum temperature soaring to 38°C (101°F) and an average of 26°C (79°F), creating a warm, inviting atmosphere. However, this month also sees frequent rainfall, with a total precipitation amount of 102 mm (4.0 in) spread across 16 days, adding a refreshing touch to the landscape. Humidity levels hover around 68%, contributing to a lush, green environment ideal for exploration. Whether you're seeking the thrill of outdoor adventures or simply enjoying the rich, natural beauty, May in Son La offers a captivating mix of heat and moisture that truly embodies the spirit of the season.
In May, Son La, Vietnam, experiences a noticeable transition towards warmer weather, with temperatures ranging from a minimum of 16°C (61°F) to a sweltering maximum of 38°C (101°F). This rise in warmth reflects the shift towards the peak of the dry season, where the average temperature reaches a comfortable 26°C (79°F), making it an inviting time for outdoor activities. Compared to earlier months, May’s temperatures signify a marked increase, following April’s maximum of 37°C (99°F). As the region basks in the vibrant heat of late spring, it's a reminder of the approaching summer, which will bring even higher temperatures in the months ahead. The contrast from the cooler early months encourages visitors to explore Son La's lush landscapes and rich cultures, all while enjoying the warm sun overhead.
May in Son La, Vietnam, emerges as a month of significant rainfall, with a total precipitation of 102 mm (4.0 in) spread across 16 days. This amount represents a slight decline compared to April, which received 103 mm (4.0 in), yet indicates a continuing trend of ample moisture. The rainfall pattern intensifies in the following months, with June and July witnessing a substantial increase, highlighting the transition into the wet season. As May balances blooming vegetation with refreshing showers, it sets the stage for the lush landscapes typical of Son La, while maintaining an inviting atmosphere for both residents and travelers alike.
As May arrives in Son La, Vietnam, the humidity begins to climb, reaching 68%—a noticeable increase from the drier April, which averaged 50%. This transition marks the beginning of a trend towards increasingly humid months, with June and July peaking at 79% and 91%, respectively. Prior to May, the region experienced relatively moderate humidity levels, particularly in March, which dipped to 57%. However, the approach of the summer brings a palpable shift, as the tropical climate of Son La sets the stage for the more intense humidity of the upcoming months. With the overall humidity steadily rising through May, residents and visitors alike can expect a lush, vibrant environment as nature flourishes in response to the growing moisture in the air.
As May rolls into Son La, Vietnam, the UV Index reaches a striking 14, maintaining its status in the extreme exposure category. This marks a peak in sun intensity as the region transitions from the higher UV levels recorded in March and April. With a burn time of just 10 minutes, it's crucial for residents and visitors to take precautions against potential skin damage. Notably, the UV Index remains consistently high, hovering at 14 from May through August, indicating a challenging sun environment throughout the summer months. As the year progresses into November and December, the index dips back to very high levels of 9 and 8, respectively. For those planning outdoor activities during this sun-intensive period, staying informed is essential. For more details, visit Son La UV Index.
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In Son La, Vietnam, May shines particularly bright, boasting an impressive 312 hours of sunshine—the highest for the year. This month marks a delightful peak in daylight as the region transitions from the cooler months of January through April, which averaged between 197 and 288 hours. Following the dazzling May, the sunshine gradually tapers off in June and July, with 280 and 283 hours respectively, before settling into a consistent pattern in the later months. The overall trend indicates a season of bountiful sunlight in spring, making May a perfect time to enjoy the vibrant landscapes of Son La. As the year progresses, each month showcases its own charm, but none quite match the radiant allure of May.
In Son La, Vietnam, the likelihood of sunny weather in May stands at 38%, marking a slight dip compared to earlier months like March and February, which enjoy 48% and 45% chances of sunshine respectively. This downward trend continues into June, where the chances plummet to just 10%. In contrast, January and December shine as the sunniest months, boasting probabilities of 43% and 55%. While May still offers a fair chance for those seeking sunshine, it's clear that the delightful rays of sun are more abundant earlier in the year, making it the ideal time for outdoor enthusiasts to plan their visits.
In Son La, Vietnam, the progression of daylight duration throughout the year reveals a captivating rhythm. With 10 hours of daylight in January, the days gradually elongate, reaching 11 hours by February and stretching to a full 12 hours in both March and April. As May arrives, the daylight peaks at 13 hours, maintaining this generous span through June and July, inviting ample opportunities for exploration and outdoor activities. However, as summer wanes in August, daylight begins to recede back to 12 hours, and the decline continues through the autumn months, settling once again to 11 hours in October and November, before closing the cycle with 10 hours in December. This gradual ebb and flow of daylight not only shapes the daily life of Son La's residents but also highlights the enchanting interplay of nature throughout the seasons.
In Son La, Vietnam, the wind characteristics in May reflect a notable trend of gentle breezes, with an average wind speed of 1.3 m/s (about 3 mph). This month marks a continuation of a gradual decline in wind strength that begins in the late winter months, peaking around January when the winds reach 1.8 m/s. As the region transitions into the heart of spring, the winds tend to soften, creating a tranquil atmosphere in May that feels almost serene. The consistency of the wind speeds through the months illustrates a predictable rhythm, with only minor fluctuations, making May's calmness a perfect backdrop for outdoor activities and appreciating nature's beauty.
Weather in Son La varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Son La, focusing on differences in temperature, rainfall, humidity, and UV levels.
May weather is significantly warmer than January, with average temperatures reaching 26°C (79°F) and highs soaring to 38°C (101°F). In contrast, January sees much cooler conditions, with an average temperature of 17°C (62°F) and maximums capped at 31°C (88°F). Additionally, May experiences higher precipitation, with 102 mm (4.0 in) spread over 16 days, while January is much drier, receiving only 34 mm (1.4 in) over just 5 days. Humidity levels are slightly higher in May at 68% compared to 63% in January. For more detailed information on January weather, you can check Son La weather in January.
In comparing the weather of May and February, May presents a significantly warmer climate, with average temperatures soaring to 26°C (79°F) and maximum highs reaching up to 38°C (101°F). In contrast, February's temperatures are much cooler, averaging around 18°C (64°F), with maximums of 33°C (92°F) and minimums dipping to 7°C (45°F). Additionally, May experiences a higher level of precipitation, with 102 mm (4.0 in) over 16 days, while February sees a mere 25 mm (1.0 in) across just 3 days, making it a drier month overall. Humidity levels are fairly similar, with May at 68% and February slightly lower at 65%. For more detailed insights on February's climate, you can visit Son La weather in February.
May and March showcase distinct weather characteristics. In May, temperatures range from a minimum of 16°C (61°F) to a scorching maximum of 38°C (101°F), with an average of 26°C (79°F). This month also experiences higher precipitation, with 102 mm (4.0 in) spread over 16 days and humidity levels reaching 68%. In contrast, March presents milder temperatures, with a minimum of 11°C (53°F), an average of 22°C (71°F), and a maximum of 34°C (93°F). Additionally, March has less rainfall, totaling 67 mm (2.6 in) over 9 days, along with lower humidity at 57%. For more detailed insights on March weather, you can visit Son La weather in March.
In comparing the weather between April and May, it's noticeable that May experiences warmer temperatures overall, with a minimum of 16°C (61°F) and an average of 26°C (79°F), as opposed to April's minimum of 11°C (52°F) and average of 23°C (74°F). The maximum temperature in May also reaches a high of 38°C (101°F), just slightly above April's peak of 37°C (99°F). Precipitation levels remain similar, with May seeing 102 mm (4.0 in) over 16 days compared to April's 103 mm (4.0 in) over 13 days. Additionally, May's humidity is notably higher at 68%, in contrast to April's 50%, which adds to the overall muggy feel of the month. For a closer look at April's weather specifics, you can refer to Son La weather in April.
In comparing the weather between May and June, we see a slight increase in both minimum and average temperatures, with June having a minimum of 21°C and an average of 27°C. May has a warmer maximum temperature of 38°C compared to June's 37°C. However, June experiences significantly more precipitation, totaling 178 mm over 24 days, as opposed to May's 102 mm over 16 days, contributing to a higher humidity level of 79% in June compared to 68% in May. For more details, you can check out Son La weather in June.
In comparing the weather between May and July, we see significant differences in both temperature and precipitation. May boasts a wide range in temperatures, with a minimum of 16°C (61°F) and a maximum of 38°C (101°F), while maintaining an average of 26°C (79°F). In contrast, July features slightly warmer minimum temperatures at 21°C (70°F) and a cooler maximum of 35°C (95°F), with the average remaining the same at 26°C (79°F). However, July is considerably wetter, with 285 mm (11.2 in) of rain over 23 days compared to May's 102 mm (4.0 in) over 16 days, resulting in a higher humidity of 91% in July versus 68% in May. For more details on the conditions in July, you can visit Son La weather in July.
In May, the weather features a significant temperature range, with minimums around 16°C (61°F) and maximums reaching up to 38°C (101°F), while the average temperature sits at 26°C (79°F). The month is marked by 102 mm (4.0 in) of precipitation over 16 days and humidity levels at around 68%. In contrast, August experiences higher minimum temperatures starting at 21°C (70°F) and a more moderate maximum of 33°C (92°F), with the average temperature slightly decreasing to 26°C (78°F). However, August brings substantially more rainfall, accumulating 322 mm (12.7 in) across 26 days, along with increased humidity levels hitting 92%. For more detailed insights on weather patterns, check out Son La weather in August.
In May, temperatures typically range from a minimum of 16°C (61°F) to a maximum of 38°C (101°F), with an average temperature of about 26°C (79°F). The month sees around 102 mm (4.0 in) of precipitation over 16 days, with a humidity level of 68%. In contrast, September experiences slightly cooler temperatures, with a minimum of 17°C (63°F) and a maximum of 34°C (94°F), averaging at 25°C (78°F). The rainfall increases to 121 mm (4.8 in) over 19 days, accompanied by higher humidity, reaching 82%. For a detailed look at the conditions during September, visit Son La weather in September.
May and October both experience mild to warm temperatures, but they differ significantly in their averages and extremes. In May, temperatures range from a minimum of 16°C (61°F) to a maximum of 38°C (101°F), with an average of 26°C (79°F). In contrast, October's temperatures are cooler, with a minimum of 12°C (54°F), an average of 23°C (73°F), and a maximum of 33°C (91°F). Precipitation levels are similar, with May seeing 102 mm (4.0 in) over 16 days and October having 103 mm (4.0 in) over 13 days. Interestingly, October also has a slightly higher humidity level at 76%, compared to May's 68%. For a closer look at the specifics of October weather, you can check out Son La weather in October.
May and November present notably different weather patterns. In May, temperatures range from a minimum of 16°C (61°F) to a scorching maximum of 38°C (101°F), with an average of 26°C (79°F). The month sees substantial rainfall, with 102 mm (4.0 in) spread over 16 days, coupled with a humidity level of 68%. In contrast, November's weather is much milder, with temperatures ranging from a low of 9°C (49°F) to a high of 31°C (89°F), averaging at 20°C (69°F). Precipitation decreases significantly to just 18 mm (0.7 in) over only 4 days, and humidity rises slightly to 72%. For more detailed information, you can check the Son La weather in November.
May and December present strikingly different weather characteristics. In May, temperatures range from a mild 16°C (61°F) at night to a scorching 38°C (101°F) during the day, with an average of 26°C (79°F). This month also sees significant rainfall, with 102 mm (4.0 in) spread over 16 days, contributing to a humid climate with 68% humidity. In contrast, December offers a much cooler climate, with temperatures dropping to a minimum of 3°C (37°F) and peaking at 31°C (89°F), averaging 16°C (62°F). Precipitation is markedly lower, with only 25 mm (1.0 in) of rain over just 4 days, while humidity remains steady at 68%. For more information, you can visit Son La weather in December.
As May unfolds in Son La, the weather becomes noticeably warmer and more humid compared to the cooler months preceding it. With temperatures reaching highs around 38°C (101°F), residents and visitors alike can expect a vibrant atmosphere filled with the lushness of early summer. The average temperature hovers around a comfortable 26°C (79°F), while a significant 102 mm (4.0 in) of rainfall over about 16 days contributes to the region's lush greenery. This month’s humidity level sits at 68%, adding a tropical feel to the air. Embrace the essence of late spring in Son La, where the blend of warmth and moisture sets the stage for a unique climatic experience. For more details, visit Son La Climate.