Last updated: August 28, 2025
May in Lao Cai, Vietnam offers a dynamic climate characterized by warm temperatures and notable rainfall. With a maximum temperature soaring to 37°C (99°F) and an average of 25°C (77°F), the weather can be quite steamy. Visitors can expect a refreshing relief with a minimum temperature of 15°C (60°F) during the cooler nights. The month sees approximately 160 mm (6.3 in) of precipitation spread across 19 days, contributing to a humid environment with an average relative humidity of 69%. This blend of heat and moisture creates a vibrant setting for exploring the stunning landscapes and rich culture of Lao Cai, making May a unique time to experience this enchanting region.
In May, Lao Cai, Vietnam transitions into a warmer embrace, with temperatures reflecting the blossoming beauty of spring. The minimum temperature rises to a comfortable 15°C (60°F), setting the stage for pleasantly mild days. As the month progresses, the average temperature reaches 25°C (77°F), while the maximum soars to 37°C (99°F), hinting at the approaching summer heat. Compared to the cooler months earlier in the year, May showcases a significant shift, making it an ideal time for outdoor adventures. Visitors can revel in the vibrant landscapes and local culture under the sun while enjoying the invigorating warmth that May brings to this picturesque region.
In May, Lao Cai experiences a notable precipitation level of 160 mm (6.3 in), which plays a crucial role in nourishing the region's lush landscapes. This month sees rainfall on 19 days, continuing the trend of frequent rain that begins in the spring. Following April's higher total of 195 mm, May's precipitation serves as a transition into the wetter months ahead, with June and July poised to bring even heavier downpours. The consistent rainfall throughout spring indicates a robust and thriving environment, setting the stage for the vibrant growth that characterizes the vibrant landscapes of Lao Cai as it moves deeper into the rainy season.
In Lao Cai, Vietnam, May ushers in a notable rise in humidity levels, reaching 69%, a significant shift from the preceding months. This increase marks a trend toward muggier conditions as the region transitions from the drier early months of the year. Following a peak in April, with its lower humidity of 53%, the moisture begins to steam up, paving the way for the sweltering summer months ahead. As temperatures rise, humidity will soar further in June, peaking at 83% and hitting a staggering 90% in both July and August. This gradual build-up of humidity not only contributes to a lush, thriving landscape but also heralds the onset of the wet season, where the air feels increasingly rich and dense.
In May, Lao Cai, Vietnam, experiences an extreme UV Index of 14, indicating a significant risk of harm from unprotected sun exposure. This marks the peak of a rising trend that began in February, when the UV Index escalated from a very high 10 to an alarming 14 in just a few months. With a consistent burn time of only 10 minutes, it is crucial for residents and visitors alike to take precautions against intense sunlight. This trend remains consistent into the following months of June and July, where the UV Index holds steady at 14. As the region approaches its sunniest months, these conditions underscore the importance of sun safety measures and awareness in outdoor activities. For more detailed information, please visit Lao Cai UV Index.
UV Risk Categories
In Lao Cai, Vietnam, the month of May shines brightly with an impressive 313 hours of sunshine, marking it as the sunniest month of the year. This surge in sunlight follows a steady increase from January's 173 hours, illustrating a warming trend as spring unfolds into summer. The sunshine hours gain momentum through March and April, both surpassing 250 hours, hinting at the approaching peak of sunny weather. As May basks in its luminous glory, the sunshine begins to slightly taper off in the following months, with June to August still enjoying over 270 hours but showing a gentle decline. The overall pattern in Lao Cai reveals a captivating dance of daylight, making May an ideal time to experience the vibrant beauty of this region, well illuminated by the sun's golden rays.
As spring gives way to summer, May in Lao Cai, Vietnam, paints a picture of increasing sunshine, with a 37% chance of clear skies. This marks a notable improvement compared to the cooler months of January through April, where sunshine probabilities lingered between 27% and 34%. As the temperatures rise, so does the likelihood of enjoying bright, sunny days—setting the stage for outdoor adventures and exploration. Interestingly, this positive trend in sunny weather continues into September, maintaining a similar 37% chance. However, as the monsoon season approaches in June and July, the prospect of sun takes a dip, showcasing the dynamic weather patterns characteristic of this enchanting region.
In Lao Cai, Vietnam, daylight duration gradually increases as the year progresses, peaking in May with an invigorating 13 hours of sunlight. This trend begins in January, where days are shorter at 10 hours, and steadily climbs through the heart of spring. By March and April, residents enjoy a notable 12 hours of daylight, reflecting the lengthening days. As summer arrives with June, July, and August, daylight remains consistent at 13 hours, providing ample time for exploration and outdoor activities. Following this peak, daylight hours begin to taper off again in the later months of the year, dropping back to 11 hours in October and November, before returning to the shorter days of winter in December and January. This cyclical pattern not only shapes the local lifestyle but also invites a vibrant celebration of the changing seasons.
In Lao Cai, Vietnam, the month of May typically experiences a gentle breeze, with average wind speeds dipping slightly to 1.2 m/s (3 mph). This trend of mild winds continues from the previous months, characterized by consistent conditions that hover around 1.3 m/s from January through April. As the year progresses into the summer months, the winds gradually calm down, reaching their lowest point at 1.0 m/s (2 mph) during July and August. Despite this reduction, the light wind in May contributes to the region's lush landscapes and vibrant atmosphere, making it an inviting time for outdoor exploration and enjoying the beautiful mountainous terrain.
Weather in Lao Cai varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Lao Cai, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present contrasting weather patterns. May experiences warmer temperatures, with averages ranging from a minimum of 15°C (60°F) to a maximum of 37°C (99°F), while January's temperatures are notably cooler, averaging between 4°C (39°F) and 26°C (78°F). Additionally, May sees higher precipitation levels, with 160 mm (6.3 in) over 19 days, compared to January's 109 mm (4.3 in) across 18 days. The humidity in May is also higher at 69%, reflecting the increased warmth and rain, compared to January's more moderate 57% humidity. For more detailed information, you can check Lao Cai weather in January.
In comparing the weather of May and February, significant differences are evident in temperature and precipitation levels. May experiences warmer temperatures ranging from a minimum of 15°C (60°F) to a maximum of 37°C (99°F), with an average temperature of 25°C (77°F). In contrast, February is much cooler, with temperatures ranging from 6°C (42°F) to 31°C (87°F) and an average of 16°C (60°F).
Precipitation is another notable difference: May receives 160 mm (6.3 in) of rain over 19 days, while February has a lower total of 105 mm (4.1 in) with rain occurring on 18 days. The humidity levels are quite similar, with May at 69% and February at 67%. For more specifics on February weather in Lao Cai, visit Lao Cai weather in February.
In comparing the weather between March and May, May tends to be warmer, with temperatures ranging from a minimum of 15°C (60°F) to a maximum of 37°C (99°F), while March has a cooler temperature range, with a minimum of 11°C (52°F) and a maximum of 33°C (91°F). Precipitation is slightly less in May at 160 mm (6.3 in) over 19 days, compared to March, which sees 167 mm (6.6 in) over 23 days. Additionally, May is more humid at 69%, compared to March's 58%, making March feel somewhat drier and cooler. For a closer look at March weather specifics, you can visit Lao Cai weather in March.
In comparing the weather of April and May, we can see some notable differences. May experiences a warmer overall temperature range, with average highs reaching 37°C (99°F) compared to April's maximum of 36°C (98°F). However, April has slightly cooler minimum temperatures, averaging 11°C (52°F), while May starts at a milder 15°C (60°F). Precipitation is higher in April, with 195 mm (7.7 in) over 19 days, compared to May's 160 mm (6.3 in) over the same number of days. Additionally, April's humidity is lower at 53%, while May sees an increase to 69%. For more details about April weather in this region, you can visit Lao Cai weather in April.
May and June present distinct weather patterns. In May, temperatures range from a minimum of 15°C (60°F) to a maximum of 37°C (99°F), with an average temperature of 25°C (77°F). This month also sees significant rainfall, totaling 160 mm (6.3 in) across 19 days, accompanied by a humidity level of 69%. In contrast, June experiences slightly warmer temperatures, with a minimum of 20°C (68°F), an average of 27°C (81°F), and a maximum of 36°C (97°F). Precipitation increases to 202 mm (7.9 in) over 20 days, and humidity rises to 83%. For more detailed information, check Lao Cai weather in June.
In comparing the weather between May and July, May typically experiences a wider temperature range with a minimum of 15°C (60°F) and a maximum reaching 37°C (99°F), resulting in an average of 25°C (77°F). However, it is also marked by significant rainfall, with 160 mm (6.3 in) falling over 19 days and a humidity level of 69%. In contrast, July tends to be warmer and more humid, with a minimum temperature of 22°C (72°F) and a maximum of 35°C (96°F), averaging around 26°C (80°F). Additionally, July sees increased precipitation, totaling 225 mm (8.8 in) over 24 days and a higher humidity level of 90%. For a deeper look into July weather specifics, you can check Lao Cai weather in July.
In May, temperatures range from a minimum of 15°C (60°F) to a maximum of 37°C (99°F), with an average of 25°C (77°F). The month experiences moderate precipitation totaling 160 mm (6.3 in) across 19 rainy days and has a humidity level of 69%. In contrast, August presents a warmer climate with minimum temperatures at 21°C (71°F) and a maximum of 35°C (96°F), averaging at 26°C (80°F). However, it sees significantly higher rainfall, with 313 mm (12.3 in) over 22 rainy days and increased humidity at 90%. To learn more about the weather conditions during this month, you can visit Lao Cai weather in August.
In May, temperatures range from a minimum of 15°C (60°F) to a maximum of 37°C (99°F), with an average temperature of 25°C (77°F). The month experiences considerable rainfall, with 160 mm (6.3 in) over 19 days and a humidity level of 69%. In contrast, September sees slightly higher minimum temperatures at 18°C (64°F) and a maximum of 34°C (93°F), while maintaining the same average of 25°C (77°F). Precipitation in September increases to 193 mm (7.6 in) across 20 days, accompanied by a higher humidity of 81%. For more details on the weather specifics in September, check out Lao Cai weather in September.
In May, temperatures range from a minimum of 15°C (60°F) to a maximum of 37°C (99°F), with an average of 25°C (77°F). This month experiences about 160 mm (6.3 in) of precipitation over 19 days, with humidity levels around 69%. In contrast, October sees slightly cooler temperatures, with a range from a minimum of 14°C (57°F) to a maximum of 31°C (88°F) and an average of 22°C (72°F). Precipitation increases to 217 mm (8.6 in) over 22 days, resulting in higher humidity at 75%. For a closer look at the weather specifics, check out Lao Cai weather in October.
May and November present contrasting weather patterns, showcasing the transition from spring to late autumn. In May, the temperatures range from a minimum of 15°C (60°F) to a scorching maximum of 37°C (99°F), with an average of 25°C (77°F). This month experiences significant precipitation, totaling 160 mm (6.3 in) over 19 days, and a humidity level of 69%. In contrast, November offers milder temperatures, with a minimum of 10°C (51°F), an average of 19°C (66°F), and a maximum of 30°C (86°F). The month's rainfall is notably less at 100 mm (3.9 in) across 18 days, accompanied by a slightly higher humidity of 74%. For more details on the weather conditions in November, you can check Lao Cai weather in November.
In May, the weather features a striking temperature range, with minimums around 15°C (60°F) and peaks reaching up to 37°C (99°F), resulting in an average of 25°C (77°F). Precipitation is heavier during this month, totaling 160 mm (6.3 in) over 19 days, alongside consistent humidity at 69%.
In contrast, December brings cooler temperatures, with minimums dropping to 3°C (38°F) and maximums reaching 26°C (80°F), leading to a comfortable average of 15°C (59°F). Rainfall decreases significantly to 97 mm (3.8 in) spread over 15 days, maintaining the same level of humidity at 69%. For a more detailed look at December weather, you can check Lao Cai weather in December.
As May approaches in Lao Cai, the weather takes on a vibrant character, characterized by warmer temperatures and notable humidity. While the days can feel sweltering with highs reaching up to 37°C, the nights offer a refreshing reprieve as temperatures dip to a mild 15°C. This transition into summer also brings an increase in rainfall, with May seeing a significant number of precipitation days compared to other months, resulting in a lush and green landscape. This dynamic climate makes May a unique time to experience the beauty of Lao Cai, with its rich natural scenery thriving under the warmth and moisture. For a deeper dive into what to expect throughout the year, explore Lao Cai Climate.