Last updated: August 21, 2025
In Koh Kong, Cambodia, September presents a warm and humid climate characterized by an average temperature of 26°C (80°F), peaking at a maximum of 31°C (88°F) and dipping to a minimum of 24°C (75°F). This month is marked by significant rainfall, with a staggering 512 mm (20.2 in) of precipitation spread over 29 days, resulting in an 87% humidity level. Visitors should be prepared for lush landscapes and frequent showers, embracing the tropical environment that defines this vibrant region during September.
In Koh Kong, Cambodia, September marks a transitional period as the temperatures continue to reflect the region's tropical climate. With minimums averaging 24°C (75°F) and a daily maximum reaching up to 31°C (88°F), the weather remains pleasantly warm but starts to show signs of cooling as the month progresses. The average temperature stabilizes around 26°C (80°F), consistent with the milder felt in previous months of July and August. While humidity levels might rise due to seasonal changes, the overall conditions invite outdoor exploration, making September a delightful time to experience the lush landscapes of this vibrant area.
September in Koh Kong, Cambodia, marks a significant point in the precipitation pattern of the year, with 512 mm (20.2 inches) of rain falling over 29 days. This month continues the trend set by August, which recorded the highest rainfall at 652 mm (25.7 inches), and serves as a bridge to the tapering rains of October with 394 mm. The heavy rains during this period reflect the peak of the wet season, contributing to the lush landscapes that define the region. This consistent rainfall not only underscores the monsoon's strength but also highlights how September's weather serves as a precursor to the gradual decline in precipitation as the year progresses. As the monsoon season draws to a close, the gradual reduction in rain starting in October begins to hint at the drier months ahead.
In Koh Kong, Cambodia, the humidity levels experience a notable progression throughout the year. Starting at a comfortable 62% in January, the humidity gradually rises, peaking during the hot summer months. By September, the humidity remains high at 87%, just shy of August's maximum of 88%. This trend of increasing moisture is accompanied by the region's transition into the rainy season, where the lush landscape thrives. As the year draws to a close, October and November witness a slight decrease to 84%, ushering in a more pleasant climate before the humidity levels drop significantly in December to 76%. The rhythmic pattern of humidity showcases the tropical essence of Koh Kong, deeply influencing its vibrant ecosystems and local lifestyle.
In Koh Kong, Cambodia, September marks a peak in the UV Index, reaching a striking 15, classified as extreme, with a consistent burn time of just 10 minutes. This month ties with the intensity seen in March and April, showcasing a trend of elevated UV exposure throughout the dry season. From January through August, the UV Index hovers around 11 to 14, but the leap in September emphasizes the need for caution. As the area transitions into the wet season, a slight decrease to 13 occurs in October, yet the entire period remains characterized by intense sun exposure, making sun protection essential year-round. Stay informed and plan accordingly with the latest updates on the Koh Kong UV Index.
UV Risk Categories
As September arrives in Koh Kong, Cambodia, the sun still shines brightly, offering 245 hours of sunlight. While this marks a decrease from the peak of 328 hours experienced in March, the overall trend of abundant sunshine remains evident throughout the year. With October poised to bring back 266 hours of sun, Koh Kong's tropical climate ensures that even as the days start to shorten, the warm, golden rays continue to invite exploration and relaxation. This continuation of sunlight is a signature trait of the region, making it an enticing destination for sun-seekers even in the rainy season.
As September rolls into Koh Kong, Cambodia, the likelihood of sunny days takes a significant dip, with only 6% chance of sunshine. This marks a stark contrast to the brighter months of January and February, which enjoy sunny probabilities of 44% and 57%, respectively. Following the peak of the dry season, the rainy months begin to unfold, leading to a noticeable decline in clear skies. With August trailing close behind at 5% sunny days, September continues this trend, suggesting that visitors should prepare for a predominantly overcast atmosphere. This shift in weather highlights the importance of planning activities around the region's seasonal variations, as sunshine becomes a rare commodity in these early autumn weeks.
In Koh Kong, Cambodia, September sees a consistent 12 hours of daylight, mirroring the trend established in the preceding months from March to August. As the year progresses, the daylight duration maintains a steady rhythm, highlighting a period of ample sunlight that supports outdoor activities and exploration. Following September’s brightness, a gradual decrease begins in October, as daylight dips back to 11 hours, signaling a transition into the latter part of the year. This pattern underscores the tropical climate’s relatively stable light conditions, ideal for both residents and visitors alike to bask in the natural beauty of this vibrant region.
In September, the winds in Koh Kong, Cambodia present a refreshing embrace, with an average speed of 3.0 m/s (7 mph), mirroring the gentle breezes of August. This slight uptick from the slower months earlier in the year signals a transition, as the region prepares for the shifting seasons. Notably, the wind speeds have gradually increased since the calm days of March and April, where they hovered around 1.8 to 1.9 m/s (4 mph). As the year progresses into the more gusty months of July and June, September maintains this moderate pace, offering a balance between the stillness of the dry season and the invigorating gusts that typify the latter part of the rainy season. This consistent wind speed not only enhances the serene atmosphere but also invites both locals and visitors to revel in the natural beauty of Koh Kong’s landscapes during this vibrant time of year.
Weather in Koh Kong varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Koh Kong, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between September and January, September tends to be much wetter and more humid. With a minimum temperature of 24°C (75°F) and an average of 26°C (80°F), September brings frequent rainfall, totaling 512 mm (20.2 in) over 29 days, and a high humidity level of 87%. In contrast, January showcases a slightly cooler atmosphere with a minimum temperature of 20°C (68°F) and an average temperature that remains steady at 26°C (80°F). Precipitation drops significantly to just 56 mm (2.2 in) over 9 days, accompanied by a more comfortable humidity level of 62%. For a closer look at January's weather specifics, check out Koh Kong weather in January.
When comparing the weather in September and February, notable differences emerge. September experiences warm temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (88°F), accompanied by high humidity levels of 87% and significant precipitation of 512 mm (20.2 in) over 29 days. In contrast, February offers slightly cooler temperatures with a minimum of 21°C (70°F) and a maximum of 33°C (92°F), marked by considerably less rainfall at just 43 mm (1.7 in) over 10 days and lower humidity at 61%. For a more detailed look at February's climate, check out Koh Kong weather in February.
When comparing the weather in September and March, notable differences emerge. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 31°C (88°F), with an average of 26°C (80°F). This month experiences significant rainfall, totaling 512 mm (20.2 in) over 29 days, resulting in high humidity levels at 87%. In contrast, March sees slightly warmer temperatures, with a minimum of 24°C (75°F), an average of 27°C (81°F), and a maximum of 33°C (91°F). Precipitation in March is considerably lower at 114 mm (4.5 in) across 21 days, and the humidity drops significantly to 61%. Overall, March offers warmer and drier conditions compared to the more humid and wetter September. For more details, check out Koh Kong weather in March.
In comparing the weather of September and April, September tends to be a bit warmer with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (88°F), while April sees slightly lower temperatures, ranging from a minimum of 22°C (71°F) to a maximum of 32°C (90°F). However, September experiences significantly higher rainfall with 512 mm (20.2 in) over 29 days, compared to April's 146 mm (5.8 in) over 26 days. Additionally, the humidity in September is notably higher at 87%, in contrast to April’s more manageable 67%. For more specific details about weather conditions during April, you can refer to Koh Kong weather in April.
In comparing the weather of September and May, both months feature similar minimum temperatures, with September averaging around 24°C (75°F) and May at 24°C (76°F). However, May tends to be slightly warmer overall, with an average temperature of 27°C (82°F) compared to September's 26°C (80°F). Notably, September experiences significantly higher precipitation, with 512 mm (20.2 in) over 29 days, whereas May sees only 296 mm (11.7 in) across 30 days. Additionally, September’s humidity averages at a higher 87%, compared to May's 78%. For a closer look at the weather specifics during this time, you can visit Koh Kong weather in May.
In both September and June, temperatures remain warm, with minimums around 24°C (75°F) and maximums reaching 31°C (88°F). However, September typically sees a slightly higher average temperature of 26°C (80°F) compared to June's 27°C (81°F). Precipitation levels are notably higher in September, with 512 mm (20.2 in) over 29 days, compared to June's 473 mm (18.6 in) across 28 days. Additionally, humidity is a tad higher in September at 87%, versus June's 84%. For those interested in a more detailed view, you can check out Koh Kong weather in June.
In comparing the weather of September and July, both months experience warm temperatures, with September showing a slightly lower average temperature of 26°C (80°F) compared to July's 27°C (80°F). July, however, has a marginally higher maximum temperature of 30°C (87°F) compared to September's peak of 31°C (88°F). Precipitation is notably more abundant in July, with 606 mm (23.9 in) over 30 days, while September receives 512 mm (20.2 in) across 29 days, making July the wetter month overall. Humidity levels remain similar in both months, at 86% for July and slightly higher at 87% in September. For more detailed information on July weather, please refer to Koh Kong weather in July.
In comparing the weather of September and August, we see that both months experience relatively high temperatures, with minimal variations: September has a minimum of 24°C (75°F), an average of 26°C (80°F), and a maximum of 31°C (88°F), while August records similar temperatures with a minimum of 24°C (76°F), an average of 27°C (80°F), and the same maximum of 31°C (87°F). However, September experiences significantly less precipitation, totaling 512 mm (20.2 in) over 29 days compared to August's 652 mm (25.7 in) over 30 days. Additionally, humidity levels are slightly lower in September at 87%, compared to August's 88%. For a more detailed look at August's weather specifics, you can check out Koh Kong weather in August.
In September, temperatures typically ranged from a low of 24°C (75°F) to a high of 31°C (88°F), with an average temperature of 26°C (80°F). The month was characterized by significant rainfall, with a total of 512 mm (20.2 in) spread across 29 days and high humidity levels at 87%. In contrast, October experiences slightly warmer temperatures, with a minimum of 23°C (74°F), an average of 27°C (80°F), and a maximum of 32°C (90°F). Rainfall decreases to 394 mm (15.5 in) over 27 days, and humidity levels drop a bit to 84%. For more detailed insights into October weather, please refer to Koh Kong weather in October.
In September, the weather is typically warmer and more humid than in November, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (88°F). The month experiences significantly more rainfall, totaling 512 mm (20.2 in) over 29 days, resulting in an average humidity level of 87%. In contrast, November shows a slight decrease in minimum temperature to 23°C (73°F) and an increase in maximum temperature to 33°C (91°F). Precipitation drops dramatically to 109 mm (4.3 in) over 17 days, with humidity also easing to 84%. For a more detailed outlook on November weather, visit Koh Kong weather in November.
In September, the weather is warm and humid, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (88°F). This month also sees significant rainfall, averaging 512 mm (20.2 in) over 29 days, which contributes to the high humidity level of 87%. In contrast, December experiences slightly cooler temperatures, with minimums dropping to 19°C (67°F) and maximums peaking at 33°C (91°F). Rainfall is considerably less in December, with only 47 mm (1.9 in) occurring over just 8 days and humidity at a more comfortable 76%. For more details about the weather during this month, you can check Koh Kong weather in December.
As September arrives in Koh Kong, the weather takes on a distinctly wet character, reflecting the tail end of the monsoon season. With high humidity and numerous precipitation days, this month is notably more humid and rainier compared to the drier months that precede it. While temperatures remain warm, averaging a comfortable 26°C, the frequent rain showers can bring a refreshing respite from the heat. If you're looking to understand how these conditions fit into the broader picture of the region's weather, explore more about the patterns in Koh Kong Climate.