Last updated: August 28, 2025
In September, Dien Bien Phu, Vietnam experiences a dynamic climate characterized by warm temperatures and significant rainfall. With maximum highs reaching 32°C (91°F) and an average temperature of 24°C (76°F), the month provides a mild atmosphere punctuated by cooler lows of 16°C (61°F). Rainfall is prevalent, as evidenced by an impressive precipitation total of 217 mm (8.5 in) over approximately 21 days, contributing to a high humidity level of 82%. This combination creates a lush landscape, perfect for experiencing the region's vibrant natural beauty.
As September unfolds in Dien Bien Phu, temperatures begin to show a gentle cooling trend, with minimums resting at 16°C (61°F) and averages peaking at a comfortable 24°C (76°F). This month marks a shift from the sweltering heat of summer, as the maximum temperature dips slightly to 32°C (91°F), making it more pleasant for outdoor explorations. The transition from the peak summer warmth to early autumn brings a refreshing balance, allowing visitors to enjoy the lush landscapes and vibrant cultural experiences without the oppressive heat typical of the preceding months. Overall, September offers a delightful blend of warmth and comfort, ideal for those looking to experience the natural beauty of this historic region.
In September, Dien Bien Phu experiences a significant dip in rainfall compared to the preceding months, with 217 mm (8.5 in) of precipitation measured over 21 days. This marks a notable decrease from the heavy downpours of August, which recorded the highest rainfall of the year at 428 mm (16.8 in). While September remains a wet month, it signals a transition towards the drier months ahead, as the frequency of rainy days also drops from the relentless 29 days in August. Overall, September's climate, characterized by moderate rainfall, sets a tone of relief from the intense monsoons that dominate the summer, paving the way for the easing of wet conditions as the region moves into October.
September in Dien Bien Phu, Vietnam sees a notable decline in humidity from the peak levels experienced during the summer months. With humidity dropping to 82%, this transition marks a shift from the oppressive 92% in August and 91% in July. As the monsoon season wanes, the air retains a sense of moisture, providing a refreshing reprieve compared to the preceding sultry months. This relatively high humidity remains, however, indicative of the region's tropical climate, creating a lush environment as the landscape prepares for the forthcoming drier months. The trend shows a gradual decrease from the highs of summer, reflecting the changing seasons and paving the way for the milder, yet still humid, autumn ahead.
In September, Dien Bien Phu experiences a notable UV Index of 14, maintaining its position within the extreme exposure category. With a burn time of just 10 minutes, it’s crucial for residents and visitors to take protective measures against the intense sun. This month continues the trend of high UV levels established from March to August, where indices peaked at 15 during both May and July. As the region transitions into autumn, the UV Index slightly decreases but remains a concern, urging everyone to stay vigilant. For further details on daily variations, check out the Dien Bien Phu UV Index.
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In Dien Bien Phu, Vietnam, September brings a delightful warmth of sunshine, with 275 hours of radiant days illuminating the landscape. As summer fades, the sunlight begins to mellow, following the peak of 317 hours in May, which showcases the region's vibrant energy. Interestingly, while the sun's presence gradually wanes into the cooler months, September's hours remain notably robust compared to the preceding months, highlighting a pleasant transition into autumn. This upward trend from August's 248 hours not only promises scenic views but also invites outdoor adventures, making it a cherished time for both locals and travelers alike. As September unfolds, Dien Bien Phu continues to bask in its golden glow, hinting at a season rich with exploration and warmth.
In Dien Bien Phu, the likelihood of sunny weather shows a fascinating seasonal variation throughout the year. March stands out with a robust 69% chance of sunshine, marking it as the peak for bright days. As spring progresses into April and May, the probability dips to 37%, hinting at a transition into the rainy season. September, while not the sunniest month, offers a moderate 29% chance of sun, reflecting the lingering hues of late summer. In the ensuing months, the likelihood of sunny days starts to slowly recover, with December rounding off the year at a healthy 62%. Overall, this trend illustrates a vibrant climatic rhythm, where sunny days dance through the seasons, inviting travelers to appreciate the beauty of Dien Bien Phu throughout the year.
As September arrives in Dien Bien Phu, Vietnam, daylight begins to taper off, offering about 12 hours of sunshine each day. This duration marks a transition, as it mirrors the longer hours seen in the spring and summer months, specifically from May through August when daylight peaked at 13 hours. With daylight beginning to decrease, September signals a shift towards the cooler months ahead, where the days gradually shorten to 11 hours in October and November, before settling back to 10 hours in the heart of winter. This gradual ebbing of daylight not only hints at the changing seasons but also invites a time for reflection and preparation as nature prepares for its quieter months.
As September arrives in Dien Bien Phu, the wind begins to whisper softer melodies, with average speeds dropping to a gentle 1.0 m/s (2 mph). This marks the low point in a year characterized by a slight ebb and flow of breezy rhythms. From the slightly stronger gusts of March and April, which reach up to 1.7 m/s (4 mph), the winds gradually ease, reflecting the transition into the cooler months. Following the mild summer, when winds hover around 1.2 m/s to 1.5 m/s, September's lull hints at the approaching autumn, inviting a calm yet serene atmosphere that envelops the region. As the days grow shorter, the soft breeze serves as a reminder of the changing seasons, quietly setting the stage for the vibrant colors and cooler days ahead.
Weather in Dien Bien Phu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Dien Bien Phu, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather patterns. In September, temperatures range from a mild 16°C (61°F) at night to a sweltering 32°C (91°F) during the day, with an average of 24°C (76°F). This month is also characterized by significant rainfall, totaling 217 mm (8.5 in) over 21 days, accompanied by a high humidity of 82%. In contrast, January offers cooler temperatures, with a minimum of 5°C (42°F) and an average of 16°C (62°F), peaking at 30°C (86°F). The precipitation drops considerably to 49 mm (1.9 in) over just 5 days, with humidity at a more comfortable 63%. For more detailed insights, you can explore Dien Bien Phu weather in January.
September and February present markedly different weather patterns. In September, temperatures range from a mild 16°C (61°F) at night to a warm 32°C (91°F) during the day, with an average of 24°C (76°F). This month also sees significant rainfall, averaging 217 mm (8.5 in) over 21 days, resulting in a high humidity level of 82%. In contrast, February offers cooler temperatures, with nighttime lows of 6°C (44°F) and daytime highs reaching 31°C (89°F), averaging 17°C (63°F). Precipitation is minimal during this month, totaling only 29 mm (1.2 in) over just 5 days, and humidity is lower at 65%. For more detailed insights, you can check Dien Bien Phu weather in February.
September and March exhibit notable differences in weather patterns. September typically experiences warmer temperatures, with a minimum of 16°C (61°F) and a maximum reaching 32°C (91°F), accompanied by high humidity at 82%. In contrast, March is cooler, with a minimum of 12°C (54°F) and a maximum of 35°C (95°F), while enjoying lower humidity at 57%. Additionally, September sees significantly more precipitation, totaling 217 mm (8.5 in) over 21 days, compared to March's 50 mm (2.0 in) over just 11 days. For a detailed look at the weather in March, you can visit Dien Bien Phu weather in March.
September and April present contrasting weather patterns. September typically has a mild minimum temperature of 16°C (61°F) and averages around 24°C (76°F), peaking at 32°C (91°F). However, it also experiences significant precipitation, with 217 mm (8.5 in) distributed over 21 days and high humidity levels at 82%. In comparison, April boasts a broader temperature range, with a minimum of 10°C (50°F), an average of 23°C (73°F), and a maximum reaching up to 36°C (97°F). Rainfall is notably lighter in April, with only 119 mm (4.7 in) over 14 days, accompanied by a much drier humidity level of 50%. For more information on the April weather specifics, check Dien Bien Phu weather in April.
In September, the weather tends to be slightly cooler, with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 32°C (91°F), accompanied by high humidity levels of 82%. This month also experiences significant rainfall, averaging 217 mm (8.5 in) over 21 days, making it a wetter time of the year. In contrast, May boasts slightly warmer weather, with an average temperature from 15°C (59°F) to a scorching maximum of 38°C (101°F) and lower humidity at 68%. With only 85 mm (3.4 in) of rainfall over 18 days, May is generally drier than September. For more detailed information, you can check out Dien Bien Phu weather in May.
When comparing the weather in September and June, it becomes clear that both months experience warm temperatures but with some notable differences. September has a slightly lower average temperature, ranging from a minimum of 16°C (61°F) to a maximum of 32°C (91°F), while June sees warmer averages, peaking at 35°C (95°F). Precipitation also varies between the two months, with June receiving 262 mm (10.3 in) over 26 days, contrasted with September's 217 mm (8.5 in) spread across 21 days. Interestingly, humidity levels are quite similar, with September at 82% and June at 79%. For those interested in more specific details about the climate, you can find more information here: Dien Bien Phu weather in June.
When comparing the weather in September and July, September experiences slightly cooler temperatures, with a minimum of 16°C and an average of 24°C, peaking at 32°C. In contrast, July sees warmer temperatures, with a minimum of 20°C, an average of 25°C, and a maximum of 34°C. However, July also has more precipitation, totaling 383 mm over 28 days compared to September's 217 mm across 21 days. Humidity levels are higher in July at 91%, while September's humidity sits at 82%. For more details on July weather conditions, you can check Dien Bien Phu weather in July.
In comparing the weather of September to that of August, September brings slightly milder temperatures, with a minimum of 16°C (61°F) and an average of 24°C (76°F), compared to August's minimum of 20°C (69°F) and average of 25°C (76°F). The maximum temperatures in both months are quite similar, reaching up to 32°C (91°F) in September and 33°C (91°F) in August. However, September experiences significantly less rainfall, with 217 mm (8.5 in) over 21 days, in contrast to August's higher precipitation of 428 mm (16.8 in) across 29 days. Additionally, humidity remains elevated in both months, with September at 82% and August slightly higher at 92%. For a more detailed look at the weather in August, you can refer to Dien Bien Phu weather in August.
September typically experiences warmer temperatures compared to October, with average highs reaching 32°C (91°F) versus October's average peak of 31°C (89°F). The minimum temperatures are also higher in September at 16°C (61°F) compared to October's low of 13°C (57°F). Additionally, September sees significantly more rainfall, totaling 217 mm (8.5 in) over 21 days, while October's precipitation decreases to 106 mm (4.2 in) over 17 days. Humidity levels are also slightly lower in October at 76%, compared to 82% in September. For more detailed insights, you can check the local weather patterns here: Dien Bien Phu weather in October.
In September, the weather is warm and humid, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 32°C (91°F) and an average of 24°C (76°F). The month also experiences significant rainfall, with 217 mm (8.5 in) of precipitation over 21 days, contributing to a high humidity level of 82%. Conversely, November brings milder temperatures, with a minimum of 11°C (52°F) and a maximum of 30°C (86°F), averaging around 20°C (68°F). The precipitation dramatically decreases to just 23 mm (0.9 in) over 5 days, resulting in lower humidity at 72%. For more information on the weather conditions in November, you can check Dien Bien Phu weather in November.
In September, the weather is significantly warmer and more humid, with average temperatures hovering around 24°C (76°F) and highs reaching up to 32°C (91°F). This month experiences considerable rainfall, with 217 mm (8.5 in) of precipitation spread over 21 days, contributing to a high humidity level of 82%. In contrast, December brings cooler temperatures, with averages dropping to 16°C (61°F) and maximums around 28°C (83°F). Precipitation is minimal during this month, amounting to only 25 mm (1.0 in) over just 4 days, and the humidity level decreases to 68%. For more detailed information, you can check the Dien Bien Phu weather in December.
September in Dien Bien Phu is characterized by a notable increase in humidity and precipitation, setting it apart from the drier months. With an average temperature around 24°C (76°F), the weather remains relatively mild; however, the frequent rainfall—spanning over 21 days—contributes to a lush landscape, contrasting sharply with the drier heat of summer. The combination of warmth and moisture creates a unique atmosphere that is both invigorating and vibrant, making it a fascinating time to experience the region's natural beauty. For a detailed breakdown of weather in this captivating city, visit Dien Bien Phu Climate.