Last updated: August 28, 2025
September in Bac Ha, Vietnam unveils a captivating blend of warm temperatures and abundant rainfall. With maximum temperatures reaching a sizzling 34°C (93°F), the average hovers around a pleasant 25°C (77°F), providing a warm backdrop for the lush landscape. However, the month is marked by a significant precipitation total of 238 mm (9.4 in), spread across 23 days, contributing to the region's rich biodiversity and vibrant scenery. The 81% humidity envelops the atmosphere, adding to the tropical feel. Visitors should be prepared for intermittent rain while enjoying the beauty of Bac Ha in its lush, verdant glory.
In September, Bac Ha, Vietnam experiences a notable shift in temperatures as the summer heat begins to wane. With a minimum temperature of 16°C (61°F) and an average of 25°C (77°F), the weather remains pleasantly warm, perfect for exploring the region's scenic landscapes and vibrant markets. The maximum temperature peaks at 34°C (93°F), maintaining a sense of summer's lingering warmth, though it is accompanied by slightly cooler mornings and evenings that hint at the approaching autumn. This transitional month creates a unique balance, making September an ideal time for outdoor activities while enjoying the breathtaking fall foliage.
In September, Bac Ha experiences a significant downpour, with precipitation amounting to 238 mm (9.4 in) over 23 rainy days. This marks a noticeable shift from the torrential rains of August, which recorded a staggering 481 mm (19.0 in), yet September remains robust, ranking among the wetter months of the year. The steady rain brings a refreshing respite after the summer heat, nourishing the lush landscapes and enhancing the region's natural beauty. As the month progresses, the rainfall begins to taper off into October, where precipitation decreases to 189 mm (7.4 in). Overall, September serves as a vital transition, providing essential moisture that sustains the vibrant ecosystems of Bac Ha as it shifts towards the drier months ahead.
In September, Bac Ha experiences a notable humidity level of 81%, marking a slight decrease from the 90% highs of July and August. This month often serves as a transitional phase as the heavy monsoon conditions begin to ease. Humidity peaks during the summer months, with June through August showcasing some of the year's highest averages, while October sees a further decline to 75%. Overall, September indicates a gradual shift in climate patterns towards a drier autumn, as humidity starts to taper off from the peak levels of the previous months, but remains relatively high compared to the earlier part of the year.
As September rolls into Bac Ha, Vietnam, residents and visitors alike should be prepared for the extreme UV conditions typical of this time, with a UV Index of 12. This marks a slight drop from the summer months, but the 10-minute burn time remains a stark reminder of the sun’s intensity, urging caution for outdoor activities. Following the highest peaks of UV Index seen in May and July, September maintains the extreme category, reinforcing the need for protective measures. As autumn approaches, the UV levels will gradually decrease, yet the need for vigilance remains paramount. For detailed insights on UV levels throughout the year, check out Bac Ha UV Index.
UV Risk Categories
As September rolls in, Bac Ha, Vietnam, enjoys a notable transition in sunshine, basking in an impressive 277 hours of sunlight. This month continues the trend of abundant daylight witnessed from May through July, where sunshine peaks dramatically with 302 hours in May. While September’s sunshine may be slightly less than its summer months, it still contributes to the gradient of bright hours, making it one of the sunlit favorites of the year. In contrast, as autumn approaches, the sunlight begins to taper off into October's 245 hours, hinting at the impending cozy charm of the late year. September stands as a vibrant reminder of Bac Ha's nature-filled splendor, striking a perfect balance of warmth and crispness that sets the stage for the changing seasons ahead.
In Bac Ha, Vietnam, the likelihood of sunny weather in September stands at a promising 36%, making it one of the more favorable months for sunshine as summer transitions into fall. This percentage reflects a slight increase from the gloomier summer months of June and July, which see only 14% and 15% of sunshine, respectively. Interestingly, September's sunshine potential aligns closely with that of May and exceeds the chances in October and November. As autumn approaches, travelers can anticipate a refreshing blend of warmth and clearer skies, an inviting setup for outdoor exploration.
As September arrives in Bac Ha, Vietnam, the city enjoys a delightful 12 hours of daylight, marking a slight decline from the summer peak. The trend of gradually shifting daylight hours reveals a gradual transition from the longer days of May to August, each boasting a full 13 hours. This reduction in daylight is poised to continue into the cooler months of October and November, which maintain 11 hours. This cyclical pattern reflects the region’s rhythmic dance with the seasons, as Bac Ha embraces the softer light and cooler temperatures of autumn, inviting both locals and visitors to savor the enchanting beauty of nature during this transitional period.
In September, Bac Ha experiences a gentle breeze that contributes to the region's tranquil charm, with an average wind speed of only 1.1 m/s (2 mph). This subtle wind is consistent with the calm conditions seen throughout the summer months, where both July and August also recorded the same speed. As the year transitions from the sweltering summer to the more refreshing autumn, September's breeze feels particularly soothing. Interestingly, the wind begins to pick up slightly in October, hinting at the upcoming seasonal shift, yet it remains at a peaceful pace compared to the stronger winds often associated with other regions. This serene backdrop makes September in Bac Ha an idyllic time for outdoor exploration and enjoying the breathtaking landscapes.
Weather in Bac Ha varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bac Ha, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, temperatures range from a minimum of 16°C (61°F) to a sizzling maximum of 34°C (93°F), with an average of 25°C (77°F). This month also sees significant precipitation, averaging 238 mm (9.4 in) over 23 days, combined with high humidity levels at 81%. In contrast, January experiences milder temperatures, with a minimum of 4°C (40°F) and a maximum of 25°C (77°F), resulting in an average of 15°C (59°F). The month is much drier, with only 62 mm (2.5 in) of precipitation across 13 days, and lower humidity at 57%. For a more detailed look at January weather, please visit Bac Ha weather in January.
September and February present two contrasting weather profiles. In September, temperatures range from a minimum of 16°C (61°F) to a maximum of 34°C (93°F), with an average of 25°C (77°F). This month also witnesses high humidity at 81% and considerable rainfall, totaling 238 mm (9.4 in) over 23 days. In contrast, February offers a cooler climate, with temperatures ranging from 6°C (43°F) to a maximum of 29°C (85°F) and an average of 16°C (60°F). Precipitation drops significantly to just 48 mm (1.9 in) across 12 days, accompanied by lower humidity at 67%. For a more detailed look at February weather, you can visit Bac Ha weather in February.
In comparing the weather between September and March, we see notable differences in temperature and precipitation patterns. September typically has a warmer average temperature of 25°C (77°F), reaching highs of 34°C (93°F), while March sees a cooler average of 20°C (68°F) with maximum temperatures around 33°C (91°F). Additionally, September is characterized by significantly higher precipitation, with 238 mm (9.4 in) spread over 23 days, in contrast to March's 76 mm (3.0 in) over 16 days. The humidity in September is also higher at 81%, compared to 58% in March. For more details on the weather conditions in March, you can visit Bac Ha weather in March.
In comparing the weather of September and April, we observe notable differences in temperature and precipitation. September experiences warmer overall temperatures with an average of 25°C (77°F), reaching highs of 34°C (93°F). In contrast, April has a slightly cooler average temperature of 22°C (72°F), with maximum temperatures peaking at 36°C (96°F). Precipitation levels are significantly higher in September, with 238 mm (9.4 in) spread over 23 days, while April sees only 113 mm (4.5 in) over 17 days, resulting in a drier month. Additionally, September has a higher humidity level at 81%, compared to April’s 53%. For more detailed weather insights specific to April, you can visit Bac Ha weather in April.
In comparing the weather between September and May, we see some notable differences. September features a minimum temperature of 16°C and a maximum of 34°C, while May experiences slightly cooler mornings at 14°C but can hit a scorching high of 38°C. Both months have the same average temperature of 25°C, but September is much wetter, with 238 mm of precipitation over 23 days compared to May's 134 mm over 20 days. Additionally, September has higher humidity at 81%, whereas May has a more comfortable 69%. For more specific information about May weather in Bac Ha, you can visit Bac Ha weather in May.
In comparing the weather of September and June, September typically experiences slightly cooler temperatures, with minimums around 16°C (61°F) and maximums reaching up to 34°C (93°F), while June's temperatures range from a minimum of 20°C (67°F) to a maximum of 36°C (98°F). Both months register significant precipitation, with September receiving about 238 mm (9.4 in) over 23 days, compared to June's 199 mm (7.8 in) over 21 days. Additionally, humidity levels are fairly similar, with September at 81% and June at 83%, contributing to a generally humid climate in both months. For more specific details about June weather, you can visit Bac Ha weather in June.
In comparing the weather between September and July, we can observe some notable differences. September experiences a wider temperature range, with minimums around 16°C (61°F) and maximums reaching 34°C (93°F), while July tends to be warmer, with temperatures ranging from a minimum of 21°C (71°F) to a maximum of 35°C (95°F). Precipitation is also more pronounced in July, with 312 mm (12.3 in) falling over 27 days compared to 238 mm (9.4 in) over 23 days in September. Additionally, humidity levels are slightly higher in July at 90%, compared to September's 81%. For a detailed look at the weather patterns in July, check out Bac Ha weather in July.
In comparing the weather between September and August, we see a notable decrease in temperature and humidity as September transitions into fall. September experiences minimum temperatures of 16°C (61°F) and an average of 25°C (77°F), while August maintains higher minimums at 21°C (71°F) and an average of 26°C (79°F). Additionally, August is characterized by more intense rainfall, with 481 mm (19.0 in) over 26 days, compared to September's 238 mm (9.4 in) across 23 days. The humidity also drops slightly from August's 90% to September's 81%, marking a shift towards more comfortable weather. For more detailed statistics, you can refer to Bac Ha weather in August.
In comparing the weather of September and October, we see a noticeable shift in temperature and conditions. September boasts warmer temperatures, ranging from a minimum of 16°C (61°F) to a maximum of 34°C (93°F), with an average of 25°C (77°F). It is also characterized by higher humidity at 81% and significant rainfall, totaling 238 mm (9.4 in) over 23 days. In contrast, October brings cooler temperatures, with a minimum of 13°C (56°F) and a maximum of 31°C (87°F), averaging 22°C (72°F). Precipitation decreases to 189 mm (7.4 in) over 21 days, and humidity drops to 75%. For a detailed look at the conditions in October, check out Bac Ha weather in October.
September and November weather exhibit notable differences in temperature and precipitation patterns. In September, temperatures range from a mild 16°C (61°F) to a sweltering 34°C (93°F) with an average of 25°C (77°F), accompanied by high humidity levels of 81%. This month experiences significant rainfall, totaling 238 mm (9.4 in) over 23 days, creating a lush environment. In contrast, November sees cooler temperatures with a minimum of 10°C (50°F), an average of 19°C (66°F), and a maximum of 30°C (86°F). Precipitation drops dramatically to 57 mm (2.3 in) over just 12 days, and humidity decreases to 74%. For a more detailed look into the weather patterns, you can visit Bac Ha weather in November.
In September, the weather is characterized by warm temperatures, with a minimum of 16°C (61°F) and an average of 25°C (77°F), peaking at a maximum of 34°C (93°F). High humidity at 81% and significant rainfall, totaling 238 mm (9.4 in) over 23 days, create a muggy atmosphere. In contrast, December brings cooler conditions, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 26°C (79°F) and an average of 15°C (59°F). The month experiences much less precipitation, at 55 mm (2.2 in) over just 12 days, and lower humidity at 69%. For more detailed insights into December weather, check out Bac Ha weather in December.
As September unfolds in Bac Ha, the weather presents a unique blend of warmth and humidity, marking a stark contrast to the drier months of summer. With maximum temperatures reaching a balmy 34°C, the average stays comfortably at 25°C, allowing for pleasant afternoons despite the frequent rain. Rainfall is significant this month, with about 238 mm over 23 days, contributing to the area’s lush, vibrant landscapes that are markedly different from the dryer spells of previous months. The elevated humidity, sitting at 81%, adds a tropical feel, making the atmosphere lush and green. For those eager to learn more about Bac Ha's weather dynamics, visit Bac Ha Climate.