Last updated: August 28, 2025
January in Son La, Vietnam is a month of cool transitions, with average temperatures hovering around 17°C (62°F), while peaking at a maximum of 31°C (88°F). Visitors can expect crisp mornings with a minimum of 6°C (43°F) that give way to warmer afternoons. The region experiences about 34 mm (1.4 in) of rainfall across 5 days, contributing to a moderate humidity level of 63%. This blend of weather conditions creates a pleasant backdrop for exploring the stunning landscapes and vibrant culture of Son La during this time of year.
In January, Son La, Vietnam experiences a diverse range of temperatures, with a minimum of 6°C (43°F) and a comfortable average of 17°C (62°F). This month marks the beginning of a gradual warming trend, as temperatures rise through February—where the minimum hits 7°C (45°F)—and into the spring months. By March, the average temperature climbs to 22°C (71°F), contributing to a noticeable shift towards warmer weather. As April and May approach, the heat intensifies, peaking at 38°C (101°F) in May. In contrast, the temperatures start to stabilize during the summer months, hovering around 21°C (70°F) for the minimum. This trend of rising and then steady temperatures throughout the year showcases Son La’s dynamic climate, offering visitors a unique experience with significant seasonal variations.
In January, Son La, Vietnam experiences relatively low precipitation, with only 34 mm (1.4 inches) falling over about 5 days. This marks the beginning of the year as one of the drier months, setting a contrast against the substantial rainfall that follows. As the season progresses, precipitation levels steadily increase, peaking dramatically in the summer months of July and August, where rainfall soars to 285 mm (11.2 inches) and 322 mm (12.7 inches) respectively. This trend highlights a clear shift from the mild, crisp beginnings of the year to the lush, rain-soaked environment typical of the monsoon season, culminating in the wettest months. Following this peak, rainfall begins to taper off sharply, bringing the year to a close with significantly lower totals in November and December, suggesting a season of renewal for the region.
In January, Son La, Vietnam experiences a moderate humidity level of 63%, setting the tone for the year ahead. As winter makes way for spring, humidity gradually rises to 65% in February before dipping to a comfortable 57% in March. However, the trend shifts as the weather warms; by May, humidity climbs to 68%, peaking dramatically during the summer months. July and August see a remarkable surge, reaching 91% and 92%, respectively, indicating that the region becomes quite sultry. As the year progresses into fall, humidity begins to taper off, concluding the year with December at 68%. This pattern illustrates a clear seasonal rhythm, with humidity levels oscillating between lower, cooler months and the heavy, moist air typical of the rainy season.
In January, Son La, Vietnam experiences a very high UV Index of 8, indicating that sun exposure can lead to skin burns in as little as 15 minutes. As the month transitions into February, the UV Index rises to 10, yet the burn time remains consistent at 15 minutes. This trend of increasing UV intensity continues into the spring months, reaching an extreme level of 13 in both March and April, with a reduced burn time of just 10 minutes. By May, the UV Index peaks at 14, persisting through the summer months of June, July, and August. The hazardous UV conditions slightly taper off in September and October, dropping back to 12 before concluding the year at 9 in November and again at 8 in December, both classified as very high. Thus, throughout January, residents and visitors should remain vigilant and protect themselves from the harsh sun, as detailed in the comprehensive guide at Son La UV Index.
UV Risk Categories
In Son La, Vietnam, January ushers in 197 hours of sunshine, setting the stage for a gradual increase in light as the year unfolds. February sees a surge with 252 hours, hinting at the promise of spring, while March brings the sunniest days yet, totaling 288 hours. The warmth continues into April with 259 hours, maintaining a vibrant ambiance. As May arrives, locals bask in the peak sunshine, soaking up an impressive 312 hours, the highest of the year. The sunny trend continues through the summer months, with June and July featuring 280 and 283 hours, respectively, before slightly tapering off in August at 267 hours. The fall months see consistent sunshine, with September clocking 285 hours and October trailing closely with 268 hours. By November and December, the total hours of sunlight remain steady at 261 and 262 hours, ensuring that as the year closes, Son La continues to enjoy a delightful balance of warmth and light.
In Son La, Vietnam, January boasts a 43% chance of sunny weather, setting a promising tone for the start of the year. As winter progresses into February and March, the likelihood of sunshine gradually increases, peaking at 48% in March. However, this upward trend doesn't last long; by April, the chance drops to 33%, hinting at the transition to the rainier months. The summer sees a significant decline in sunshine, with June and July recording their lowest probabilities at just 10% and 18%, respectively. Interestingly, as the calendar turns to December, the chances rebound to 55%, offering a glimmer of hope for sun-seekers by year’s end. Overall, while January provides a decent opportunity for clear skies, it is part of a fluctuating trend that balances sunny days with the onset of seasonal rains.
In Son La, Vietnam, January welcomes visitors with about 10 hours of daylight, setting the stage for a gradual increase in sunlight as the year progresses. By February, daylight extends to 11 hours, and by March, the days grow even longer, reaching 12 hours. This trend continues through the spring, with April maintaining that same generous duration. As summer approaches in May and June, daylight peaks at 13 hours, providing ample time to explore the stunning landscapes. The sunlit hours begin to taper off in August, settling back to 12 hours, and further declining to 11 hours in October and November. By December, the daylight returns to 10 hours, closing the year with a reflective cycle that highlights the region's rhythmic seasonal shifts.
In January, Son La, Vietnam greets the New Year with its average wind speed reaching 1.8 m/s (4 mph), setting a refreshing tone for the month. This slight breeze is characteristic of the region's winter, as it begins to transition into warmer months. Notably, the wind speeds gradually decline as the year progresses, dipping to a steady low of 1.1 m/s (3 mph) by September. Interestingly, the winds tend to pick up again in November and December, each returning to 1.6 m/s (4 mph), hinting at a rhythmic cycle influenced by seasonal changes. Overall, the January winds reflect a dynamic climate, perfectly poised between the cold of winter and the warmth of spring.
Weather in Son La varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Son La, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, temperatures range from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), with an average of 17°C (62°F). The month experiences 34 mm (1.4 in) of precipitation over about 5 days, accompanied by a humidity level of 63%. In contrast, February sees slightly warmer temperatures, with a minimum of 7°C (45°F) and a maximum reaching 33°C (92°F), averaging 18°C (64°F). Precipitation decreases to 25 mm (1.0 in) over just 3 days, while humidity rises marginally to 65%. For more detailed information on February weather, check out Son La weather in February.
In January, the weather in Son La is generally mild, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), and an average temperature of 17°C (62°F). The month sees about 34 mm (1.4 in) of precipitation over approximately 5 rainy days, coupled with a humidity level of 63%.
In contrast, March experiences warmer temperatures, with a minimum of 11°C (53°F) and a maximum of 34°C (93°F), giving an average of 22°C (71°F). Precipitation increases to 67 mm (2.6 in) spread over around 9 days, while humidity slightly decreases to 57%. This shift makes March a notably wetter and warmer month compared to January. For a more detailed look at the weather in March, check out Son La weather in March.
In January, the weather is generally mild with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), and an average temperature of 17°C (62°F). The month sees around 34 mm (1.4 in) of precipitation over approximately 5 days, coupled with a humidity level of 63%.
In contrast, April experiences warmer temperatures with a minimum of 11°C (52°F) and soaring to a maximum of 37°C (99°F), resulting in a much higher average of 23°C (74°F). However, this month also brings increased rainfall, with 103 mm (4.0 in) of precipitation spread over 13 days, and the humidity drops to 50%. For a more detailed look at weather conditions in Son La during this month, check out Son La weather in April.
In January, the weather tends to be milder, with average temperatures ranging from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), and only 34 mm (1.4 in) of precipitation occurring over about 5 days, while humidity levels are at 63%. In contrast, May brings much warmer conditions, with temperatures ranging from a minimum of 16°C (61°F) to a scorching maximum of 38°C (101°F). Rainfall increases significantly in May, totaling 102 mm (4.0 in) over 16 days, and humidity rises slightly to 68%. For a detailed look at the weather in May, you can visit Son La weather in May.
In January, the weather in Son La is mild, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), resulting in an average of 17°C (62°F). The month sees relatively low precipitation of 34 mm (1.4 in) over just 5 days, and humidity levels are comfortable at 63%.
In contrast, June brings significantly warmer conditions, with temperatures ranging from a minimum of 21°C (70°F) to a scorching maximum of 37°C (99°F), averaging around 27°C (80°F). Precipitation skyrockets to 178 mm (7.0 in) across 24 days, contributing to higher humidity levels at 79%. For a closer look at the specific climate patterns, check out Son La weather in June.
In January, the weather in Son La exhibits a more moderate climate, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), averaging 17°C (62°F). The month sees relatively low precipitation, with 34 mm (1.4 in) over just 5 days, resulting in a humidity level of 63%.
In contrast, July experiences significantly warmer temperatures, with a minimum of 21°C (70°F) and maximum reaching 35°C (95°F), leading to an average temperature of 26°C (79°F). July is also marked by much higher rainfall, totaling 285 mm (11.2 in) spread across 23 days, which contributes to the increased humidity of 91%. For more detailed information, you can refer to Son La weather in July.
When comparing the weather in January and August, it's clear that these two months offer significantly different conditions. January experiences milder temperatures with a minimum of 6°C (43°F) and an average of 17°C (62°F), peaking at 31°C (88°F). It also sees relatively low precipitation at 34 mm (1.4 in) over just 5 days, along with a comfortable humidity level of 63%. In contrast, August is warmer and more humid, with minimum temperatures around 21°C (70°F) and average highs of 26°C (78°F), which can reach up to 33°C (92°F). However, August is also much wetter, with a substantial 322 mm (12.7 in) of rainfall over 26 days and a high humidity level of 92%. For more details, you can check Son La weather in August.
January weather features milder temperatures, ranging from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), with an average of 17°C (62°F). The month sees relatively low precipitation, with 34 mm (1.4 in) of rain spread over just 5 days and a humidity level of 63%. In contrast, September experiences warmer temperatures, with a minimum of 17°C (63°F) and a maximum of 34°C (94°F), averaging 25°C (78°F). However, it is also significantly wetter, receiving 121 mm (4.8 in) of rainfall over 19 days, along with a higher humidity of 82%. For more detailed information, check Son La weather in September.
In January, the weather features a minimum temperature of 6°C (43°F) and an average high of 31°C (88°F), with relatively low precipitation of 34 mm (1.4 in) spread over just 5 days. The humidity stands at 63%, making it a moderately dry month. In contrast, October is noticeably warmer, with a minimum of 12°C (54°F) and an average maximum temperature of 33°C (91°F). However, it experiences significantly higher rainfall, totaling 103 mm (4.0 in) over 13 days, contributing to elevated humidity levels of 76%. For more detailed insights, you can check out Son La weather in October.
In January, temperatures start at a minimum of 6°C (43°F) and peak at 31°C (88°F), with an average of 17°C (62°F). The month experiences 34 mm (1.4 in) of precipitation over approximately 5 days, contributing to a humidity level of 63%. In contrast, November sees slightly milder temperatures, with a minimum of 9°C (49°F) and an average of 20°C (69°F), while still reaching a maximum of 31°C (89°F). This month receives less rainfall, totaling 18 mm (0.7 in) over about 4 days, and features higher humidity at 72%. For more details, check Son La weather in November.
January and December exhibit relatively mild weather patterns, with January showing slightly higher average temperatures than December. In January, the minimum temperature is 6°C (43°F), compared to December’s 3°C (37°F). Both months have maximum temperatures peaking at around 31°C (88°F) and 31°C (89°F), respectively. Rainfall is a bit more frequent in January, with 34 mm (1.4 in) of precipitation over 5 days, while December sees 25 mm (1.0 in) across 4 days. Humidity levels are also slightly higher in December at 68%, compared to January’s 63%. For more details, visit Son La weather in December.
January in Son La presents a refreshing contrast to the warmer months, with temperatures that fluctuate between comfortable highs and cool lows. While the average temperature hovers around a mild 17°C, the region experiences lower humidity levels and relatively little precipitation, making it one of the drier months. This combination of temperate weather and light rainfall provides a crisp and invigorating atmosphere, perfect for exploring the stunning landscapes. As you consider planning your visit, you might want to check out the detailed information available at Son La Climate to fully appreciate the region's charm in January.