Last updated: August 28, 2025
In September, Hoan Kiem, Vietnam experiences a dynamic blend of weather patterns that shape the local atmosphere. With maximum temperatures soaring up to 37°C (99°F), the month averages a warm 28°C (83°F), while the evenings bring a refreshing dip to 21°C (71°F). However, the allure of this vibrant city isn't without its challenges, as precipitation can be significant, with 222 mm (8.7 in) of rain falling across 21 days. Coupled with an average humidity of 82%, the weather creates a tropical environment, perfect for those who thrive in warmth and moisture. Embrace the unpredictable charm of Hoan Kiem, where each rainy event adds to the allure of this captivating Vietnamese locale.
As September unfolds in Hoan Kiem, Vietnam, temperatures reflect a gentle transition from the sweltering summer months. With a minimum of 21°C (71°F) and an average of 28°C (83°F), the weather remains pleasantly warm, though the maximum reaches a steamy 37°C (99°F). This slight dip in temperature compared to the peak summer months indicates that summer is gradually giving way to cooler autumn breezes. The nights are increasingly comfortable, inviting locals and visitors alike to explore the vibrant scenery and rich culture of the area. Overall, September offers a delightful escape from the relentless heat of earlier months while maintaining the tropical warmth that characterizes this beautiful region.
In September, Hoan Kiem, Vietnam, experiences a significant precipitation total of 222 mm (8.7 in) over approximately 21 rainy days, maintaining the monsoon's hold on the region. This moderate drop from August's peak of 378 mm (14.9 in) reflects the tail end of the wet season, yet the rainfall is still substantial enough to keep the landscape lush and vibrant. With the monsoon gradually easing, September's weather sets the stage for a transition into drier months, characterized by fewer rainy days as the city prepares for the drier conditions that follow. Overall, the month's precipitation patterns highlight a blend of lingering monsoon influence while hinting at a change on the horizon.
In September, Hoan Kiem, Vietnam experiences a notable humidity level of 82%, signaling a shift from the intense moisture of the summer months. Following the peak of 90% in July and 89% in August, September marks a slight decrease, yet the air remains quite humid, creating a lush, tropical atmosphere. This pattern highlights the region's seasonal transition, where the lingering warmth and humidity pave the way for the onset of autumn. As the year progresses, humidity levels gradually drop, reaching 77% in October, making September a significant marker of the changing climatic cycle in Hoan Kiem.
As September rolls in, Hoan Kiem experiences a highly intense UV Index of 13, categorized as extreme. This level mirrors the peak readings seen in August and May, indicating that the sun's rays are particularly potent during this time of year. With a burn time of just 10 minutes, it's crucial for residents and visitors alike to take adequate precautions against sun exposure. This trend of elevated UV levels continues through the months, with only slight fluctuations, emphasizing the importance of sun safety year-round. For more detailed UV forecasts, check out Hoan Kiem UV Index.
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In September, Hoan Kiem bathes in a generous 267 hours of sunshine, showcasing a vibrant transition from the summer's peak. The month harmoniously follows the sweltering days of August, as daylight begins to gently wane, yet still offers ample sunlight comparable to the sunnier months of May and June. This trend reflects a broader pattern of increasing daylight from the start of the year, peaking during the summer before gradually tapering off into the autumn months. As October approaches with 235 hours of sunshine, September serves as a delightful bridge, inviting both locals and visitors to enjoy the city's striking landscapes under a warm, golden glow before the cooler months beckon.
In September, Hoan Kiem, Vietnam, experiences a 23% chance of sunny weather, which reflects a slight uptick compared to the preceding months of August and June, both of which see some of the lowest percentages at 13%. This transitional month hints at the gradual return of clearer skies, albeit still cloaked by lingering rainclouds that characterize the tail end of the monsoon season. As the year progresses into October, the likelihood of sunshine rises modestly to 24%, suggesting that September is a pivotal bridge towards sunnier autumn days. Overall, while September may not guarantee an abundance of sun, it signals a hopeful shift as the weather begins to stabilize, inviting outdoor enthusiasts to embrace the fleeting golden moments.
As September unfolds in Hoan Kiem, Vietnam, the daylight duration settles at 12 hours, a continuation of the vibrant summer months. This month marks a transition, as daylight begins to wane from the peak of 13 hours enjoyed from May through August. Following the warm embrace of summer, September reflects a slight pull towards the cooler months of fall, setting the stage for the enchanting sights of autumn. With daylight gradually decreasing, it invites locals and visitors alike to savor the lingering sun before the days shorten further in October, where daylight returns to 11 hours. The rhythmic ebb and flow of daylight captures the essence of Hoan Kiem's changing seasons, making each moment in this picturesque locale uniquely enchanting.
As September unfolds in Hoan Kiem, Vietnam, the gentle breeze weaves through the vibrant streets, with average wind speeds dipping to a subtle 1.5 m/s (approximately 3 mph). This marks a continuation of a trend observed throughout the summer months, where the winds have gradually softened from the previous highs in May. The transition into fall brings a serene stillness, contrasting with the lively gusts of earlier months. Following September, there's a noticeable uptick in winds again by October, suggesting a seasonal shift that evokes both tranquility and anticipation for the fresh breezes ahead. Overall, the wind in September embodies a whisper of change, inviting reflection amidst the lively ambiance of Hoan Kiem.
Weather in Hoan Kiem varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hoan Kiem, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase starkly contrasting weather patterns. September boasts much warmer temperatures, with minimums around 21°C (71°F) and peak averages reaching up to 37°C (99°F). It is also marked by significant rainfall, with 222 mm (8.7 in) spread over 21 days and high humidity levels of 82%. In contrast, January presents a cooler climate with minimums dropping to 8°C (46°F) and average highs at 29°C (84°F). It experiences considerably less precipitation, with only 58 mm (2.3 in) over 8 days, and lower humidity at 66%. For more detailed insights, check out Hoan Kiem weather in January.
September and February present distinctly different weather patterns. In September, temperatures range from a minimum of 21°C (71°F) to a maximum of 37°C (99°F), with an average of 28°C (83°F). This month experiences significant rainfall, totaling 222 mm (8.7 in) over 21 days, and high humidity at 82%. Conversely, February is much cooler, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 31°C (88°F), averaging 19°C (66°F). Rainfall in February is considerably lower, at 41 mm (1.6 in) over just 7 days, and humidity drops to 71%. For more specific information about weather during February, refer to this link: Hoan Kiem weather in February.
When comparing the weather in September and March, it’s clear that September tends to be hotter and wetter. September features an average temperature of 28°C (83°F), with maximums reaching up to 37°C (99°F) and high humidity levels at 82%. The month experiences substantial rainfall, accumulating 222 mm (8.7 in) over 21 days. In contrast, March is much cooler, with an average temperature of 22°C (73°F) and maximums around 34°C (94°F). Additionally, it sees significantly less precipitation at 65 mm (2.5 in) spread across 14 days and a lower humidity level of 69%. For more specific details on March weather, you can visit Hoan Kiem weather in March.
September and April present distinct weather patterns. In September, temperatures are typically warmer, with averages reaching 28°C (83°F) and maximums soaring up to 37°C (99°F). The month tends to be quite humid, with an average humidity of 82% and significant rainfall, totaling 222 mm (8.7 in) over 21 days. In contrast, April experiences milder conditions, featuring an average temperature of 25°C (77°F) and maximums around 36°C (97°F). With precipitation of 147 mm (5.8 in) across 14 days and lower humidity at 64%, April offers a more comfortable climate. For more detailed information, you can check Hoan Kiem weather in April.
When comparing the weather in September and May, both months exhibit similar average temperatures, hovering around 28°C (83°F). However, September experiences noticeably higher humidity at 82%, while May is comparatively drier with humidity at 73%. The temperature extremes also differ slightly; September has a maximum of 37°C (99°F), whereas May can reach up to a scorching 39°C (103°F). In terms of precipitation, September sees more rainfall, totaling 222 mm (8.7 in) over 21 days, compared to May's 188 mm (7.4 in) over 17 days. For a closer look at weather specifics in May, visit Hoan Kiem weather in May.
September and June offer contrasting weather patterns, with June generally being hotter and slightly more humid. June boasts an average temperature of 31°C (87°F), peaking at a scorching 40°C (105°F), while September's average is a bit cooler at 28°C (83°F) with a maximum of 37°C (99°F). In terms of rainfall, September receives more precipitation at 222 mm (8.7 in) over 21 days compared to June's 189 mm (7.4 in) across 15 days. Despite the higher temperatures in June, both months have comparable humidity levels, with September at 82% and June at 81%. For a detailed look at June weather in Hoan Kiem, check out Hoan Kiem weather in June.
September weather tends to be slightly cooler than July, with average temperatures ranging from a minimum of 21°C (71°F) to a maximum of 37°C (99°F), compared to July's minimum of 25°C (78°F) and maximum of 39°C (103°F). While September sees an average temperature of 28°C (83°F), July maintains a warmer average of 30°C (86°F). Both months experience significant rainfall, but July typically has slightly more precipitation at 260 mm (10.2 in) compared to September's 222 mm (8.7 in), with both months seeing rain on about 21 days. Additionally, July has higher humidity levels at 90%, compared to September's 82%. For more detailed insights on July weather in the region, you can check Hoan Kiem weather in July.
In comparing the weather of September to August, we find that September experiences slightly lower temperatures, with a minimum of 21°C (71°F), an average of 28°C (83°F), and a maximum of 37°C (99°F). In contrast, August has a higher minimum temperature of 24°C (76°F) and a maximum of 39°C (102°F). Additionally, September sees reduced precipitation levels, with 222 mm (8.7 in) over 21 days, compared to August's 378 mm (14.9 in) over 22 days. Humidity also drops slightly in September to 82%, while August remains higher at 89%. For more details, you can check Hoan Kiem weather in August.
In comparing the weather conditions between September and October, we observe a notable decrease in average temperatures. September experiences a minimum of 21°C (71°F) and averages around 28°C (83°F), peaking at 37°C (99°F). In contrast, October boasts a cooler minimum temperature of 17°C (63°F) and an average of 25°C (78°F), with a maximum reaching 34°C (94°F). Precipitation levels also shift, as September records 222 mm (8.7 in) over 21 days, whereas October sees an increase to 279 mm (11.0 in) spread across 16 days. Despite more rainfall in October, humidity levels dip slightly from 82% in September to 77%. For detailed insights into October's weather, you can visit Hoan Kiem weather in October.
In comparing the weather between September and November, we observe a significant drop in temperatures and precipitation levels. September experiences much warmer conditions, with average temperatures reaching 28°C (83°F) and maximums peaking at 37°C (99°F), accompanied by a high humidity of 82% and substantial rainfall of 222 mm (8.7 in) spread across 21 days. In contrast, November brings a milder climate, featuring average temperatures of 22°C (73°F), maximums of 33°C (92°F), and a notable decrease in precipitation to just 48 mm (1.9 in) over 8 days. The humidity also lowers to 72%, contributing to a more comfortable atmosphere. For a detailed look at what to expect, visit Hoan Kiem weather in November.
September and December showcase a stark contrast in weather patterns. In September, temperatures are considerably warmer, with minimums around 21°C (71°F) and maximums hitting as high as 37°C (99°F). This month is also marked by high humidity at 82% and substantial precipitation, averaging 222 mm (8.7 in) over 21 days. In contrast, December brings cooler conditions, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 31°C (87°F), and an average of 18°C (65°F). Additionally, moisture levels decrease, resulting in only 41 mm (1.6 in) of rain over just 7 days and a humidity level of 71%. For more information about December weather, you can visit Hoan Kiem weather in December.
As September unfolds in Hoan Kiem, the weather transitions into a more moderate rhythm, setting it apart from the sweltering heat of summer months. With temperatures averaging a comfortable 28°C (83°F) and a significant uptick in rainfall, this month ushers in a refreshing change, typical of early autumn. The humidity hovers around a sticky 82%, resulting in occasional downpours that contribute to 222 mm (8.7 in) of precipitation over 21 days, creating a vibrant, lush landscape. This blend of moderate warmth and increased rainfall not only refreshes the city but also prepares it for the upcoming cooler months. For a deeper dive into the region's climatic nuances, visit Hoan Kiem Climate.