Last updated: August 28, 2025
In September, Dong Hoi, Vietnam, experiences a warm and humid climate, with average temperatures hovering around 28°C (83°F), reaching up to a maximum of 34°C (94°F). The season is notably marked by significant precipitation, totaling 386 mm (15.2 in) over approximately 19 days. With humidity levels soaring to 87%, this month showcases a vibrant yet damp atmosphere, making it essential for travelers to prepare for both the heat and the rain while exploring the beauty of this coastal town.
In September, temperatures in Dong Hoi, Vietnam begin to show the initial signs of transitioning from the summer heat. With a minimum of 24°C (75°F) and a pleasant average of 28°C (83°F), the weather remains warm yet comfortable. The maximum temperature reaches 34°C (94°F), indicating that while the peak summer months may be behind, the warmth is still quite prominent. Compared to the soaring highs of previous months, September offers a slight reprieve, making it an inviting time to explore the area's stunning landscapes and rich culture. As the month progresses, residents and visitors alike can enjoy the lingering warmth before the cooler autumn days settle in.
In September, Dong Hoi experiences a significant uptick in rainfall, with an impressive 386 mm (15.2 in) of precipitation recorded over 19 days. This marks a striking contrast to the drier months preceding it, as both June and May saw much lower totals of 47 mm (1.8 in) and 91 mm (3.6 in), respectively. Furthermore, September’s downpour sets the stage for an even wetter October, which averages a staggering 734 mm (28.9 in), indicating that the region is transitioning into its peak rainy season. The patterns reveal a clear buildup of moisture in the atmosphere, leading to prolonged periods of rain that enhance the vibrant landscapes of this coastal city. As the rain falls steadily throughout September, it not only transforms Dong Hoi’s scenery but also nourishes the local ecosystem, showcasing the essential role of seasonal precipitation in shaping the region’s climate.
In September, Dong Hoi experiences a notable humidity level of 87%, which reflects the lingering effects of the summer months. As the year progresses, humidity levels tend to peak during July and August at 90% and 92%, respectively, creating a sultry atmosphere typical of the region's tropical climate. Following this peak, September sees a slight dip, yet the humidity remains high, suggesting that the transition to autumn does not bring immediate relief from the heat. The trend reveals a gradual decline in humidity from the summer months into the fall, with values still notably elevated compared to the cooler winter months, where levels hover around 77% to 60%. Visitors can expect warm, humid conditions in September, indicative of Dong Hoi’s tropical allure.
In September, Dong Hoi, Vietnam, maintains its extreme UV Index at 13, indicating that sun protection is essential with a reduced burn time of just 10 minutes. This month continues a trend from the preceding summer months, where the UV Index consistently reached levels between 13 and 14. As the season transitions towards autumn, the UV Index begins to slightly taper off, yet remains a significant concern for outdoor activities. The overall pattern illustrates a persistent exposure to intense UV radiation from January through October, emphasizing the need for vigilance in sun safety. For more detailed information, visit Dong Hoi UV Index.
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As summer transitions into autumn, September in Dong Hoi, Vietnam basks in a delightful 295 hours of sunshine. This month continues the trend of abundant daylight established over the warmer months, peaking in May with an impressive 323 hours. While September sees a slight dip compared to August’s 300 hours, it still offers plenty of bright days, encapsulating the vibrant energy of late summer. The gradual decrease that follows into October suggests a gentle shift towards the cooler, less sun-drenched months ahead. Overall, September exemplifies the ideal balance of warmth and light, making it a beautiful time to explore the stunning landscapes of Dong Hoi.
In September, Dong Hoi, Vietnam experiences a relatively modest chance of sunny weather, with only 21% likelihood of sunshine. This aligns with the trend observed during the late summer months, where conditions remain somewhat unpredictable, following the peak of 46% sunshine in May but tapering off in the latter months. The sun's appearance is less frequent than in the spring and early summer, with particularly low probabilities in the subsequent months of October and December. Therefore, while September may not be the sunniest time of year, it still offers a glimmer of brightness within the seasonal ebb and flow of weather patterns.
In Dong Hoi, Vietnam, September marks a subtle transition in daylight hours as the summer days begin to wane. The city enjoys a pleasant 12 hours of daylight, similar to the months preceding it. This consistency in daylight duration reflects the harmonious climate of the region, with daylight gradually increasing from 11 hours in January and February to a peak of 13 hours in June and July before leveling off again in August and September. As autumn approaches, the daylight begins its slow retreat, setting the stage for the shorter days of the following months, while still offering ample time to explore the beauty of Dong Hoi and its surroundings.
As September unfolds in Dong Hoi, Vietnam, the wind slows to a gentle 2.5 m/s (6 mph), creating a serene atmosphere after the more vigorous breezes of summer. This drop in wind speed contrasts sharply with the lively gusts of 4.8 m/s (11 mph) that characterized the previous months of June and July. Following a gradual decrease from the bustling summer winds, September presents a transition into a calmer phase, reminiscent of the earlier months of the year. However, the seasonal trend suggests that just as the winds wane, they will soon pick up again in October, inviting a refreshing change as the year progresses. This rhythmic dance of the winds reflects not only the climatic shifts but also the captivating charm of Dong Hoi's coastal allure throughout the year.
Weather in Dong Hoi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Dong Hoi, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present distinct contrasts in weather. September experiences higher temperatures, with a minimum of 24°C (75°F) and a maximum of 34°C (94°F), while January is cooler, ranging from a minimum of 13°C (55°F) to a maximum of 28°C (83°F). Precipitation is significantly heavier in September, totaling 386 mm (15.2 in) over 19 days, compared to January’s 145 mm (5.7 in) over the same number of days. Additionally, September's humidity is higher at 87%, while January sees a slightly lower humidity level of 77%. For more details, you can check Dong Hoi weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 34°C (94°F), with an average of 28°C (83°F). This month is characterized by high humidity at 87% and significant rainfall, accumulating 386 mm (15.2 inches) over 19 days. In stark contrast, February offers milder temperatures with a minimum of 11°C (52°F) and a maximum of 30°C (86°F), averaging at 20°C (69°F). The precipitation is considerably lower at 92 mm (3.6 inches) over 16 days, and humidity drops to 73%. For a deeper understanding of February's climate, check out Dong Hoi weather in February.
September and March present distinct weather contrasts. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 34°C (94°F), with an average of 28°C (83°F). The month is quite humid, averaging 87%, and experiences significant rainfall of 386 mm (15.2 in) over 19 days. In contrast, March features milder temperatures with a minimum of 17°C (63°F), an average of 23°C (74°F), and a maximum of 33°C (92°F). Additionally, March sees much less precipitation at 89 mm (3.5 in) over 17 days, coupled with a lower humidity level of 64%. For a closer look at the weather dynamics, check out Dong Hoi weather in March.
September and April present contrasting weather patterns. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 34°C (94°F), with an average of 28°C (83°F). This month is characterized by high humidity at 87% and significant rainfall, totaling 386 mm (15.2 in) across 19 days. In contrast, April brings a more moderate climate, with temperatures varying from a minimum of 17°C (63°F) to a maximum of 36°C (97°F), and an average of 25°C (77°F). Rainfall is markedly lower in April, with just 100 mm (3.9 in) over 16 days and a reduced humidity of 60%. For more details on April weather, you can visit Dong Hoi weather in April.
In comparing the weather between September and May, it’s clear that September tends to be more humid and wetter. The average temperature in September is slightly higher at 28°C (83°F), with maximums reaching up to 34°C (94°F). With significant rainfall of 386 mm (15.2 in) over 19 days, the month experiences high humidity levels of 87%. In contrast, May offers a comparable average temperature of 28°C (82°F) but boasts even hotter maximums of 37°C (99°F). However, it is much drier with only 91 mm (3.6 in) of precipitation over 15 days and a lower humidity level of 73%. This makes May feel quite different, leaning towards a hot and dry climate. For more detailed weather insights, you can check out Dong Hoi weather in May.
When comparing the weather in September and June, it is evident that both months experience warm temperatures, but with notable differences. September has a minimum temperature of 24°C (75°F) and an average of 28°C (83°F), while June sees a slightly higher average temperature of 30°C (86°F), peaking at 37°C (100°F). Precipitation is significantly greater in September, with 386 mm (15.2 in) falling over 19 days, compared to June’s 47 mm (1.8 in) and only 8 days of rain. Additionally, September has a higher humidity level at 87%, compared to 82% in June. This creates a much wetter and more humid environment in September than in June. For more information, you can check Dong Hoi weather in June.
When comparing the weather in September to that of July, September tends to be slightly cooler, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 34°C (94°F), while July features a minimum of 25°C (77°F) and peaks at 36°C (98°F). Additionally, September experiences significantly more rainfall, with 386 mm (15.2 in) of precipitation spread over 19 days compared to July's 199 mm (7.9 in) over just 11 days. Humidity levels remain high for both months, with September at 87% and July slightly higher at 90%. For more detailed insights, you can check Dong Hoi weather in July.
In comparing the weather between August and September, we find that September experiences slightly cooler temperatures, with average highs reaching 34°C (94°F) compared to August's maximum of 35°C (96°F). However, September is noticeably wetter, with a significant increase in precipitation to 386 mm (15.2 in) over 19 days, versus August's 135 mm (5.3 in) across 12 days. The humidity also remains quite high in both months, but September is marginally lower at 87%, compared to August's 92%. For more details on August weather, you can visit Dong Hoi weather in August.
September and October weather exhibit notable differences in temperature and precipitation patterns. In September, temperatures are warmer with a minimum of 24°C (75°F), averaging 28°C (83°F), and reaching a maximum of 34°C (94°F). The month experiences significant rainfall, totaling 386 mm (15.2 in) over 19 days and maintaining high humidity at 87%. In contrast, October sees cooler temperatures, with a minimum of 20°C (68°F), an average of 25°C (78°F), and a maximum of 33°C (91°F). However, it experiences even greater rainfall, accumulating 734 mm (28.9 in) across 25 days, while humidity remains relatively high at 85%. For more detailed information, you can check Dong Hoi weather in October.
September and November exhibit notable differences in weather, reflecting the transition from late summer to early fall. In September, temperatures are warmer, with minimums around 24°C (75°F) and maximums reaching 34°C (94°F), while November sees cooler temperatures, ranging from a minimum of 16°C (61°F) to a maximum of 30°C (86°F). While both months experience significant rainfall, November is slightly wetter than September, with 424 mm (16.7 in) of precipitation over 23 days compared to September's 386 mm (15.2 in) across 19 days. Humidity levels are relatively similar, with September at 87% and November at 84%. For more detailed information, visit Dong Hoi weather in November.
September and December present contrasting weather experiences. In September, temperatures soar with a minimum of 24°C (75°F) and an average peak of 34°C (94°F), accompanied by high humidity levels of 87%. The month also sees considerable rainfall, with 386 mm (15.2 in) spread over 19 days. Conversely, December offers cooler temperatures, with a minimum of 15°C (59°F) and a maximum of 27°C (81°F), along with reduced rainfall totaling 250 mm (9.8 in) over 21 days and slightly lower humidity at 83%. For those looking to understand more about December's climate specifics, you can check Dong Hoi weather in December.
As September settles in Dong Hoi, the weather begins to shift, characterized by a notable increase in precipitation and humidity compared to the summer months. With average temperatures hovering around a balmy 28°C, the month offers a comfortable warmth, but the frequent rain showers—on about 19 days—create a lush, vibrant atmosphere. This transition from the drier, hotter spell of the preceding months to the more humid conditions marks September as a unique time to experience the region's natural beauty. For those curious about the intricacies of Dong Hoi's climate, more detailed insights await at Dong Hoi Climate.