Last updated: August 28, 2025
In Co Loa, Vietnam, the weather in September presents a tapestry of warm temperatures and high humidity. Experience maximum temperatures reaching 37°C (99°F), while the average hovers at a comfortable 28°C (83°F), and nights offer a mild reprieve with lows of 21°C (71°F). This month is marked by significant rainfall, accumulating to 222 mm (8.7 in) over 21 days, resulting in an 82% humidity level that envelops the region. Whether you're exploring the ancient sites or indulging in local cuisine, the vibrant atmosphere of Co Loa during September is both invigorating and refreshing.
In September, temperatures in Co Loa, Vietnam transition into a warmer, yet still manageable phase of the year. The month marks a gradual shift, with minimum temperatures settling around 21°C (71°F) and rising towards maximums of 37°C (99°F). With an average of 28°C (83°F), it's clear that summer's heat lingers, yet there's a notable respite from the extreme highs seen in the preceding months of July and August. This makes September an inviting time for outdoor exploration, where visitors can enjoy balmy conditions without the relentless heat of mid-summer. As the month unfolds, the refreshing hints of autumn begin to emerge, setting the stage for cooler evenings ahead.
September in Co Loa, Vietnam, marks a significant transition in the region's precipitation patterns, with an impressive 222 mm (8.7 in) of rainfall recorded over 21 days. Following the peak of the rainy season in August, which saw a staggering 378 mm (14.9 in), September remains notably wet but begins the gradual decline towards the drier months ahead. This period showcases a dynamic weather shift, where the cumulative precipitation starts to taper, yet retains the vigor of summer storms. The consistent rainfall not only nourishes the lush landscapes but also prepares the region for the upcoming months, as October typically brings 279 mm (11.0 in) and a decrease in rainy days. Overall, September is a key player in the annual precipitation cycle, bridging the gap between peak rainfall and the impending dryness of the later months.
In September, Co Loa, Vietnam, experiences a humidity level of 82%, continuing a trend of high moisture that characterizes the summer months. The humidity peaks in July at a staggering 90%, followed closely by August at 89%, marking this period as the most humid of the year. As autumn approaches, humidity begins to slightly decrease, transitioning from the sweltering summer. In contrast, the earlier months of the year show more moderate levels, with January at 66% and April dropping to 64%. Overall, September reflects the lingering effects of the summer’s humidity while hinting at a gradual shift towards drier conditions in the coming months.
In September, Co Loa, Vietnam, experiences a notably high UV Index of 13, placing it in the extreme exposure category with a burn time of just 10 minutes. This follows a pattern established over the summer months, where the UV Index consistently reaches similar heights, peaking in May and August. As the year transitions into autumn, the UV intensity begins to moderate but remains significantly high, with October still recording an 11. Residents and visitors should take precautionary measures to protect their skin, particularly in the midday sun. For more detailed information about UV levels throughout the year, visit Co Loa UV Index.
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September in Co Loa, Vietnam, shines brightly with 267 hours of sunlight, making it a delightful month for exploring the area's lush landscapes. This sunny stretch follows a dynamic progression throughout the year, where the hours of sunshine peak in May with an impressive 280 hours, marking the height of summer. As the seasons transition, July and August maintain a golden glow, averaging around 274 and 259 hours, respectively. The gradual decline in sunlight hours begins in October, but September stands out as a vibrant prelude to the cooler months ahead. This blend of sunny days and gradual change invites visitors to bask in Co Loa's beauty and engage with its rich cultural tapestry.
In Co Loa, Vietnam, September brings a 23% chance of sunny weather, which reflects an upward trend compared to the dismal sun probability seen in the preceding summer months of June and August, where it plunged to 13%. While September still grapples with a significant likelihood of clouds, it marks a transition into a season of greater sunshine as the year progresses. Following this month, the likelihood of sunny days continues to improve, reaching 36% in November and peaking at 45% in December. Thus, while September may not be the sunniest of months, it serves as a promising prelude to brighter days ahead.
In Co Loa, Vietnam, September marks a transition as daylight begins to gently recede with 12 hours of sunshine, mirroring the consistent daylight of the previous month. This shift follows a peak in May through July, where the days were at their longest, basking in 13 hours of light. As autumn approaches, Co Loa experiences a gradual return to shorter days, reflective of the overall trend throughout the year—from the 10 hours of daylight in January to the 11 hours in November. This rhythm of changing daylight not only signifies seasonal shifts but also paints a beautiful picture of nature's cycles in this vibrant region.
As September settles into Co Loa, Vietnam, the air becomes noticeably calmer, with the average wind speed dropping to 1.5 m/s (3 mph)—the lowest of the year. This gentle breeze contrasts sharply with the slightly more vigorous winds of the spring and summer months, which peaked at 2.8 m/s (6 mph) in May. While the winds begin to recede, October promises a refreshing uptick, hinting at a transition back to more lively gusts. This seasonal ebb and flow reflects the evolving rhythm of nature in Co Loa, inviting both reflection and anticipation as the landscape prepares for the changes ahead.
Weather in Co Loa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Co Loa, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures range significantly, with a minimum of 21°C (71°F) and a scorching maximum of 37°C (99°F), leading to an average temperature of 28°C (83°F). This month also sees high humidity at 82% and substantial rainfall, with 222 mm (8.7 in) spread over 21 days. In contrast, January experiences much cooler temperatures, with a minimum of 8°C (46°F) and a maximum of 29°C (84°F), resulting in a comfortable average of 18°C (65°F). Rainfall is significantly lower at 58 mm (2.3 in) over just 8 days, and humidity drops to 66%. For more specifics on January weather, you can visit Co Loa weather in January.
September and February present markedly different weather patterns. In September, temperatures soar with daily averages around 28°C (83°F), peaking at a sweltering 37°C (99°F). This month is also quite humid, with around 82% humidity and frequent rain, totaling 222 mm (8.7 in) over 21 days. In contrast, February is much cooler, with average temperatures of 19°C (66°F) and a maximum of 31°C (88°F). Rainfall drops significantly to 41 mm (1.6 in) over just 7 days, and humidity is lower at 71%. For more specific details about the weather in February, you can visit Co Loa weather in February.
September and March present contrasting weather patterns. In September, temperatures range significantly, with a minimum of 21°C (71°F) and a peak of 37°C (99°F), leading to an average of 28°C (83°F). This month is characterized by high humidity at 82% and substantial rainfall, with 222 mm (8.7 in) of precipitation spread over 21 days. In contrast, March sees milder temperatures, with a minimum of 14°C (57°F) and a maximum of 34°C (94°F), averaging 22°C (73°F). The humidity is lower at 69%, and precipitation is considerably less, totaling 65 mm (2.5 in) over 14 days. For more specific information about weather patterns in March, visit Co Loa weather in March.
When comparing the weather of September and April, noticeable differences emerge. September typically enjoys warmer temperatures, with an average of 28°C (83°F) and a maximum reaching up to 37°C (99°F). In contrast, April's temperatures are milder, averaging 25°C (77°F) with highs of 36°C (97°F). Additionally, September experiences significantly higher precipitation, totaling 222 mm (8.7 inches) across 21 days, while April sees less rain at 147 mm (5.8 inches) over 14 days. The humidity in September is also much higher at 82%, compared to April's more comfortable 64%. For a closer look at the weather during April, you can visit Co Loa weather in April.
In comparing the weather of September and May, both months showcase an average temperature of 28°C (83°F), but May tends to have slightly warmer maxima, reaching up to 39°C (103°F) compared to September's maximum of 37°C (99°F). September is marked by higher humidity at 82%, which can make the heat feel more intense, while May has a lower humidity level of 73%. Precipitation is notably higher in September, with 222 mm (8.7 in) spread over 21 days, compared to May's 188 mm (7.4 in) over just 17 days. Thus, September typically experiences more rain and humidity, while May's weather is characterized by warmer temperatures and slightly less precipitation. For more detailed information, you can refer to Co Loa weather in May.
In comparing the weather of September and June, it's evident that both months experience high temperatures and humidity, but with notable differences. September has a minimum temperature of 21°C (71°F), while June starts a bit warmer at 23°C (74°F). The average temperature in June peaks at 31°C (87°F), surpassing September's average of 28°C (83°F). Additionally, June can reach a maximum of 40°C (105°F), considerably hotter than September's maximum of 37°C (99°F). While September sees more rainfall with 222 mm (8.7 in) over 21 days, June is slightly drier, receiving 189 mm (7.4 in) across 15 days. Humidity levels are similar, with September at 82% and June at 81%. For more details on June weather, you can refer to Co Loa weather in June.
When comparing the weather in September and July, we find some notable differences. September tends to have slightly lower average temperatures, with a minimum of 21°C (71°F) and an average of 28°C (83°F), compared to July's minimum of 25°C (78°F) and average of 30°C (86°F). However, July is hotter overall, reaching maximum temperatures of 39°C (103°F), while September peaks at 37°C (99°F). Both months experience significant rainfall, but July sees a bit more, with 260 mm (10.2 in) compared to September's 222 mm (8.7 in). Additionally, humidity levels are higher in July at 90%, compared to September's 82%. For more details on July weather, you can check Co Loa weather in July.
In comparing the weather between August and September, September experiences slightly cooler temperatures, with a minimum of 21°C (71°F) and an average of 28°C (83°F), compared to August's minimum of 24°C (76°F) and average of 29°C (85°F). However, August has higher maximum temperatures, reaching up to 39°C (102°F), whereas September peaks at 37°C (99°F). Precipitation is significantly greater in August, totaling 378 mm (14.9 in) over 22 days, while September sees 222 mm (8.7 in) across 21 days. Humidity levels are also slightly lower in September at 82% compared to August's 89%. For more detailed information, you can visit Co Loa weather in August.
In September, temperatures range from a minimum of 21°C (71°F) to a scorching maximum of 37°C (99°F), with an average of 28°C (83°F). This month also experiences considerable rainfall, totaling 222 mm (8.7 in) over 21 days, paired with high humidity at 82%. In contrast, October brings cooler temperatures, with a minimum of 17°C (63°F), an average of 25°C (78°F), and a maximum of 34°C (94°F). Precipitation increases to 279 mm (11.0 in) but occurs over fewer days, totaling 16. Humidity also drops slightly to 77%. For more detailed insights into October's weather, you can check out Co Loa weather in October.
In September, the weather is much warmer and more humid, with average temperatures around 28°C (83°F) and maximums reaching up to 37°C (99°F). It also experiences higher precipitation, totaling 222 mm (8.7 in) over 21 rainy days, resulting in an 82% humidity level. In contrast, November brings cooler temperatures, with averages dropping to 22°C (73°F) and maximums of 33°C (92°F). Precipitation significantly decreases to just 48 mm (1.9 in) over 8 days, and the humidity level lowers to 72%. For more details on the November weather in Co Loa, you can refer to Co Loa weather in November.
September weather is characterized by much warmer temperatures, with daily averages reaching up to 28°C (83°F) and maximums soaring to 37°C (99°F). The month experiences high humidity levels at 82% and significant rainfall, totaling 222 mm (8.7 in) over 21 days. In contrast, December offers a cooler climate, with temperatures ranging from a minimum of 8°C (47°F) to a more comfortable average of 18°C (65°F) and highs of 31°C (87°F). Precipitation is considerably lower in December, amounting to just 41 mm (1.6 in) over 7 days, and humidity drops to 71%. For more detailed information about December weather, you can visit Co Loa weather in December.
September weather in Co Loa marks a transition into the cooler, more humid autumn season, making it notably distinct from the scorching summer months. The average temperature dips to a comfortable 28°C (83°F), offering a reprieve from the peak heat of July and August. However, the high humidity levels at 82% combined with significant rainfall—spanning 21 days and totaling 222 mm—create a lush, vibrant atmosphere. This blend of warmth and moisture sets the stage for a rich tapestry of green landscapes, inviting outdoor activities while reminding visitors to stay prepared for sudden showers. To explore more about Co Loa's climate conditions throughout the year, visit Co Loa Climate.