Last updated: August 28, 2025
September in Cao Bang, Vietnam features a warm climate with maximum temperatures reaching 33°C (93°F) and an average of 25°C (77°F), offering a pleasant ambiance for outdoor activities. However, temperatures can drop to a minimum of 17°C (62°F) during cooler evenings. This month is characterized by considerable precipitation, totaling 186 mm (7.3 in) over approximately 20 days, leading to a high humidity level of 76%. Travelers should prepare for occasional showers, but the lush, vibrant landscape transformed by this rain presents a stunning backdrop for exploration.
In September, Cao Bang, Vietnam, experiences a pleasant transition from the summer heat to the cooler autumn months. The daily temperatures range from a minimum of 17°C (62°F) to a maximum of 33°C (93°F), with an average temperature settling at a comfortable 25°C (77°F). This slight dip from the high summer averages reflects a refreshing change, making it an ideal time for outdoor adventures against the backdrop of stunning natural landscapes. As the month progresses, the warmth begins to ease, paving the way for the more crisp and tranquil months ahead. Overall, September presents an enticing blend of warmth and comfort, perfect for immersing oneself in the beauty of Cao Bang.
In September, Cao Bang, Vietnam experiences a significant decline in rainfall, with precipitation totaling 186 mm (7.3 in), a drop from the previous month’s peak. This month sees a moderate 20 days of rain, reflecting a shift from the intense monsoon season that characterizes the summer months of June through August. The consistent rain pattern continues, albeit at a reduced intensity, aligning with the region’s transition into autumn. This trend suggests that while September retains substantial moisture levels, it marks the beginning of drier conditions leading into the fall, setting the stage for the upcoming months where precipitation further tapers off.
In Cao Bang, Vietnam, September marks a notable transition in humidity levels as the summer heat begins to wane. With an average humidity of 76%, this month demonstrates a slight drop from the sweltering 90% experienced in the preceding months of July and August. This decrease signals the approach of autumn, offering a brief reprieve from the peak humidity of the hotter seasons. As the year progresses, humidity gradually declines, settling to 71% in October and continuing to trend downward through the final months. The progression from the highs of summer to the more comfortable levels of early autumn makes September a unique and refreshing time to experience the lush landscapes of Cao Bang.
As September rolls into Cao Bang, Vietnam, the UV Index remains notably high at 13, classified under the extreme exposure category, with a burn time of just 10 minutes. This trend reflects a continuation of the intense UV conditions observed throughout the summer months. June and July peak at an impressive 14, and while August slightly maintains that intensity, September shows a slight dip yet still demands vigilance against sun exposure. As a reminder, it’s crucial to monitor these UV levels and protect your skin during this time. For more detailed information, check out the Cao Bang UV Index.
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In Cao Bang, Vietnam, September shines with 276 hours of sunlight, marking a transition from summer's peak brightness to the softer glow of autumn. This month continues the trend seen from May through August, where the region basked in an impressive abundance of sunshine, reaching up to 284 hours in August. As September unfolds, the daylight hours remain substantial, reflecting the area's vibrant energy before gradually tapering off into the cooler months of October and November. The pattern of increasing sunlight from the start of the year culminates in late summer, illustrating how Cao Bang embraces the most radiant days of the year, inviting visitors to explore its breathtaking landscapes and rich culture under the warm sun.
In Cao Bang, Vietnam, September offers a refreshing 33% chance of sunny weather, marking a notable improvement compared to the drizzly summer months of June (13%) and August (15%). This month serves as a transition where the likelihood of sunshine begins to rise again, echoing the trends observed in the year’s beginning, notably in January with a 37% chance. While September's sunlit hours may not rival the peak months, the increase from the depths of summer brings a welcome shift, inviting outdoor adventures in this enchanting region as it gently shifts towards autumn.
In Cao Bang, Vietnam, the September daylight duration is notably consistent, offering about 12 hours of sunlight each day. This month marks a gentle transition from the long, sun-soaked days of summer, where daylight peaked at 13 hours from May to August, gradually receding as autumn approaches. With daylight lingering at this moderate level, September provides an ideal balance of light and shade, making it perfect for outdoor activities and exploration. As the year progresses into October, daylight will diminish further, settling into a rhythm of approximately 11 hours per day, reflecting the natural ebb and flow of seasons in this picturesque region.
As September approaches in Cao Bang, Vietnam, the landscape experiences a notable shift, with average wind speeds declining to a gentle 1.5 m/s (3 mph). This subtle decrease is part of a broader seasonal trend, as the winds have been gradually softening since their peak in March. While April and May maintain a brisk pace of around 2.2-2.4 m/s (5 mph), the summer months see a steady decline, emphasizing a languid summer atmosphere. As autumn sets in, the winds begin to pick up again in October, signaling a transition toward more invigorating breezes, but September offers a serene lull. It’s a time when the calming air invites reflection, making it a perfect moment to appreciate Cao Bang’s breathtaking scenery in tranquility.
Weather in Cao Bang varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Cao Bang, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 33°C (93°F), with an average of 25°C (77°F). This month experiences high humidity at 76% and substantial rainfall, accumulating 186 mm (7.3 in) over 20 days. In contrast, January brings much cooler temperatures, with lows of 4°C (40°F) and highs peaking at 24°C (76°F), averaging 14°C (57°F). Additionally, January is significantly drier, with only 86 mm (3.4 in) of precipitation spread over just 13 days and a lower humidity level of 59%. For a closer look at the weather specifics, visit Cao Bang weather in January.
In September, the weather is notably warmer with average temperatures ranging from a minimum of 17°C (62°F) to a maximum of 33°C (93°F), accompanied by high humidity at 76%. This month also experiences significant rainfall, totaling 186 mm (7.3 in) over approximately 20 days. In contrast, February brings a much cooler climate, featuring average temperatures between 4°C (39°F) and 28°C (83°F). Precipitation is substantially lower at 68 mm (2.7 in), occurring over 12 days, and humidity sits at a more comfortable 66%. For more details, check out Cao Bang weather in February.
When comparing the weather in September and March, notable differences emerge. In September, the temperatures are generally warmer, with minimums around 17°C (62°F) and maximums reaching up to 33°C (93°F), alongside a high average of 25°C (77°F). The month is characterized by significant rainfall, totaling 186 mm (7.3 in) over 20 days, and higher humidity levels at 76%. In contrast, March experiences cooler temperatures, with minimums around 9°C (48°F) and maximums peaking at 30°C (87°F), leading to a lower average of 19°C (66°F). Precipitation is also less intense, totaling 134 mm (5.3 in), but it too occurs over 20 days, with humidity at a more comfortable 66%. For a detailed overview of conditions in March, you can check Cao Bang weather in March.
September and April present contrasting weather patterns. In September, temperatures rise, with averages around 25°C (77°F) and highs reaching 33°C (93°F), while humidity levels soar to 76%. The month experiences significant rainfall, totaling 186 mm (7.3 in) across approximately 20 days. In contrast, April sees cooler temperatures, with an average of 21°C (70°F) and a minimum of 8°C (47°F), despite also having occasional highs of 33°C (92°F). Precipitation in April is lighter at 138 mm (5.4 in) over 19 days, accompanied by lower humidity levels at 60%. For more information on the weather in April, you can check Cao Bang weather in April.
In comparing the weather between September and May, we observe that both months have a similar range of temperatures, with September averaging 25°C (77°F) and May slightly warmer at an average of 24°C (76°F). However, May can reach higher maximum temperatures of up to 35°C (96°F), whereas September peaks at 33°C (93°F). Precipitation is also noteworthy, with September receiving 186 mm (7.3 in) over about 20 days, while May sees slightly more rain at 200 mm (7.9 in) during 24 days. Humidity levels are comparable in both months, lingering around 76-77%. For a closer look at the weather specifics in May, you can check Cao Bang weather in May.
In comparing the weather between September and June, we see some notable differences. September typically has a minimum temperature of 17°C (62°F) and an average of 25°C (77°F), while June is slightly warmer, with a minimum of 18°C (64°F) and an average of 26°C (79°F). However, June also experiences higher maximum temperatures, reaching up to 36°C (97°F) compared to September's maximum of 33°C (93°F). Precipitation levels are significantly greater in June, with 304 mm (12.0 in) over 25 days, while September receives 186 mm (7.3 in) across 20 days, making June quite a wetter month. Humidity is also higher in June, averaging 85%, compared to September's 76%. For more detailed insights on June weather, you can check Cao Bang weather in June.
In comparing the weather between September and July, September experiences slightly cooler temperatures with a minimum of 17°C (62°F), averaging 25°C (77°F), and a maximum of 33°C (93°F), while July's temperatures range from a minimum of 22°C (72°F) to a maximum of 35°C (96°F). However, July is characterized by higher humidity at 90% compared to September's 76%. Additionally, July sees more precipitation, with 262 mm (10.3 in) over 26 days, while September has 186 mm (7.3 in) spread across 20 days. For more details on July weather, you can check out Cao Bang weather in July.
When comparing the weather in September and August, September tends to be slightly cooler with average temperatures ranging from a minimum of 17°C (62°F) to a maximum of 33°C (93°F), while August is warmer with temperatures fluctuating between 22°C (72°F) and 35°C (95°F). September also experiences less precipitation, totaling 186 mm (7.3 in) over 20 days, compared to August's 316 mm (12.4 in) across 27 days. Additionally, humidity levels are lower in September at 76%, compared to the more humid August, which has a 90% humidity. For a more detailed look at August weather patterns, you can check Cao Bang weather in August.
In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 33°C (93°F), with an average temperature of 25°C (77°F). The month experiences significant rainfall, totaling 186 mm (7.3 in) over 20 days and a high humidity level of 76%. In contrast, October sees a drop in average temperatures to 21°C (71°F), with minimums of 13°C (55°F) and maximums reaching 32°C (89°F). Precipitation remains similar at 187 mm (7.4 in) but occurs over fewer days, 17 in total, and the humidity decreases slightly to 71%. For more detailed information about October weather, you can visit Cao Bang weather in October.
September and November present quite a contrast in weather conditions. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 33°C (93°F), with an average of 25°C (77°F). The month experiences significant rainfall, totaling 186 mm (7.3 in) over 20 days, and the humidity is relatively high at 76%. In comparison, November sees much cooler temperatures, with a minimum of 7°C (46°F), an average of 18°C (65°F), and a maximum of 28°C (83°F). Additionally, the precipitation decreases to 61 mm (2.4 in) across 13 days, and humidity drops slightly to 69%. For more detailed information, you can check Cao Bang weather in November.
In September, the weather is characterized by warm temperatures, with a minimum of 17°C (62°F) and an average of 25°C (77°F), peaking at 33°C (93°F). This month also sees considerable rainfall, totaling 186 mm (7.3 in) over approximately 20 days, along with high humidity levels around 76%. In contrast, December experiences much cooler temperatures, with a minimum of 4°C (39°F) and an average of 14°C (57°F), rising to a maximum of 27°C (80°F). Precipitation decreases significantly to 57 mm (2.2 in) over just 11 days, and humidity drops to 66%. For a more detailed overview of December weather, you can visit Cao Bang weather in December.
As September rolls into Cao Bang, the weather undergoes a notable transformation, shifting from the lingering warmth of summer to a more moderate climate. With average temperatures around 25°C (77°F), the heat becomes less oppressive, making outdoor activities more enjoyable. However, this month also brings increased rainfall, with approximately 186 mm spread over 20 days, leading to a high humidity level of 76% that can feel quite muggy. This contrasts sharply with the drier, hotter months preceding it, offering a refreshing change as the landscape begins to come alive in lush greenery. For those looking to explore this stunning region, September presents a unique atmosphere, blending the transition of seasons with its characteristic charm. For more insights, check out Cao Bang Climate.