Last updated: August 21, 2025
In Siem Reap, Cambodia, August weather brings a mix of high temperatures and significant humidity, with daytime highs reaching up to 37°C (99°F) and an average temperature of 29°C (85°F). Visitors can expect warm, tropical conditions, complemented by a high humidity level of 90% that can amplify the heat. Precipitation is prevalent during this month, with 152 mm (6.0 in) of rain falling over approximately 23 days, making August one of the wetter months. Travelers should prepare for sudden showers amidst the heat, as the vibrant landscape flourishes under the monsoon's influence.
In August, Siem Reap experiences warm and humid temperatures, with nighttime lows around 25°C (77°F) and daytime highs peaking at 37°C (99°F). The average temperature during this month hovers at 29°C (85°F), making it one of the more comfortable periods in the midst of the monsoon season. Compared to the previous month, July, there's a slight shift in the daily maximums, which drops just a touch, but the overall warmth remains consistent. This time of year is characterized by occasional rainfall, providing relief from the heat and inspiring lush landscapes, perfect for exploring the ancient temples and vibrant culture of the region. As August transitions into September, temperatures begin to cool slightly, yet the tropical warmth prevails, inviting visitors to enjoy the city’s enchanting allure.
In August, Siem Reap experiences its peak precipitation, with a notable 152 mm (6.0 in) of rainfall over 23 days. This month marks a continuation of the intense rainy season that begins in May, culminating in some of the year’s highest totals, reflecting the region's shift to a more humid and lush landscape. The steady increase in rain from June (117 mm) to July (145 mm) sets the stage for August's torrential downpours, which further contribute to the surrounding greenery and vibrant ecosystems. As the rains pour down, the atmospheric humidity rises, creating a lively yet tropical ambiance that characterizes this beautiful Cambodian destination during late summer.
In August, Siem Reap experiences its peak humidity, soaring to an impressive 90%. This marks a significant rise from the drier months earlier in the year, with January and February averaging around 55% and 50%, respectively. The transition into the monsoon season is evident as humidity levels climb steadily from May's 78%, reaching a staggering 88% in July. As August nears the end of the rainy season, humidity remains consistently high, setting the stage for a lush and vibrant landscape, while also embracing the warm and sticky atmosphere that characterizes this tropical climate. Following August, humidity gradually decreases to 85% in October before tapering into the cooler, less humid months of the year.
In August, Siem Reap, Cambodia, continues to experience a very high UV Index of 14, placing it firmly in the extreme exposure category. With a remarkably short burn time of just 10 minutes, outdoor adventurers should take special care during this month. This pattern of extremely high UV levels persists from February through October, showcasing a daunting trend in which the risk of sunburn remains consistently high. As temperatures rise and the sun shines brightly, it’s essential to stay protected and efficient in sun safety practices. For a detailed overview and further insights, visit Siem Reap UV Index.
UV Risk Categories
In August, the sun graces Siem Reap with 287 hours of radiant daylight, contributing to the region's vibrant atmosphere. While this marks a slight dip from the peak of 326 hours in March, it remains consistent with the summer months, showcasing a steady pattern of ample sunshine. This gentle retreat in hours continues a trend observed through the wet season, where daylight starts to wane but still offers a warm embrace. As summer transitions into the lush greenery of September, the city’s charm remains illuminated, inviting travelers to explore its temples and markets bathed in warm light, reminding us that even in the ebb of summer, Siem Reap shines brightly.
In Siem Reap, Cambodia, the likelihood of sunny weather takes a notable dive in August, with only an 8% chance of sunshine. This trend reflects the region's transition into the wet season, indicating that outdoor activities might face interruptions from the rain. Comparatively, the early months of the year, such as February with a 75% chance, offer a much brighter picture, while even April and May start to drop as the heat intensifies and rains approach. The significant shift in sunlight availability from the dry season to August highlights the importance of planning ahead for travelers hoping to soak up the sun amidst the lush greenery that the rains bring.
In Siem Reap, Cambodia, the month of August enjoys a generous 12 hours of daylight, continuing a trend that begins in March and lasts through September. This consistent daylight duration creates an ideal backdrop for exploring the magnificent temples, vibrant markets, and lush landscapes of the region. As the year progresses, daylight begins at 11 hours in the earlier months, gradually increasing to the 12-hour mark during the warmer mid-year months, before tapering back to 11 hours in the final quarter. This seamless transition in daylight highlights the tropical climate's influence, inviting both adventure and relaxation under Cambodia's shimmering sun.
In August, the wind in Siem Reap, Cambodia whispers at an average speed of 2.5 m/s (6 mph), reminiscent of various breezy months throughout the year. This gentle airflow mirrors the calmness of January and December, which also boast a speed of 2.5 m/s. As the scorching summer transitions into a more temperate late monsoon season, the wind picks up slightly in June and July, reaching its peak at 3.3 m/s (7 mph). However, by August, it settles back into a soothing rhythm, offering a comforting embrace amidst the vibrant landscapes and historical wonders of this enchanting destination. The overall trend showcases a return to moderate winds as the lush greenery flourishes, inviting visitors to explore the serene temples and vibrant markets of Siem Reap.
Weather in Siem Reap varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Siem Reap, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, the weather is characterized by significantly higher temperatures, with a minimum of 25°C (77°F) and an average of 29°C (85°F), peaking at 37°C (99°F). This month also experiences substantial rainfall, totaling 152 mm (6.0 in) over 23 days, leading to high humidity levels around 90%. In contrast, January offers a more temperate climate, with a minimum temperature of 15°C (59°F) and an average of 27°C (81°F), reaching a maximum of 35°C (95°F). Precipitation is minimal during this month, with only 11 mm (0.4 in) observed over just 2 days, and humidity levels are notably lower at 55%. For more insights into January's climate, visit Siem Reap weather in January.
In comparing the weather between August and February, it's clear that August is characterized by significantly warmer temperatures, averaging 29°C (85°F) with maximums reaching up to 37°C (99°F). This month also brings high humidity at 90% and substantial rainfall, with 152 mm (6.0 in) spread over 23 days. In contrast, February offers a more moderate climate, with average temperatures around 28°C (82°F) and highs of 36°C (97°F). The humidity is considerably lower at 50%, and precipitation is minimal, totaling only 9 mm (0.3 in) over just 2 days. For more detailed insights, you can refer to the comprehensive information provided here: Siem Reap weather in February.
August and March present contrasting weather patterns, particularly in terms of humidity and precipitation. In August, temperatures range from a minimum of 25°C to a maximum of 37°C, with an average of 29°C and high humidity at 90%. This month experiences significant rainfall, averaging 152 mm over 23 days. In contrast, March sees slightly warmer average temperatures of 30°C, with similar maximums reaching 37°C, but a lower minimum of 22°C. Precipitation is minimal in March, only about 40 mm across 6 days, and the humidity drops to 47%, making it a much drier month. For more detailed insights, check out Siem Reap weather in March.
When comparing the weather in August and April, notable differences emerge. August generally experiences higher humidity at 90%, with average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 37°C (99°F). In contrast, April has a lower humidity level of 55% and an almost equal average temperature, but it peaks higher at 39°C (102°F). Precipitation also varies significantly; August receives a hefty 152 mm (6.0 in) over 23 days, while April records only 86 mm (3.4 in) across 14 rainy days. For a detailed look at April's climate specifics, visit Siem Reap weather in April.
When comparing the weather in August and May, both months experience warm temperatures, but August tends to be slightly milder overall. In August, the minimum temperature is 25°C (77°F) with an average of 29°C (85°F), while May sees a lower minimum of 22°C (72°F) but a higher average of 30°C (86°F). While August reaches a maximum of 37°C (99°F), May can get hotter with peaks up to 39°C (103°F). Precipitation is more frequent in August, with rain on 23 days and a total of 152 mm (6.0 in), compared to May's 20 rainy days and 141 mm (5.6 in). Additionally, August has a higher humidity level at 90%, whereas May's humidity sits at a more comfortable 78%. For more detailed insights into May's weather, you can check Siem Reap weather in May.
When comparing the weather in August and June, we observe some notable differences. August experiences slightly lower average temperatures, with a minimum of 25°C (77°F) and a maximum of 37°C (99°F), while June is a bit warmer with a minimum of 26°C (79°F) and a maximum of 38°C (100°F). Precipitation is more pronounced in August, averaging 152 mm (6.0 in) over 23 days, compared to June's 117 mm (4.6 in) over 21 days. Humidity is also higher in August at 90%, while June has a humidity level of 86%. For a more detailed look at June's weather, you can visit Siem Reap weather in June.
In comparing the weather of August and July, both months exhibit similar temperature ranges with minimum temperatures starting at 25°C (77°F) and average temperatures around 29°C (85°F). However, July tends to be slightly warmer with a maximum temperature reaching 38°C (101°F), compared to August's peak of 37°C (99°F). Precipitation levels are fairly comparable as well, with August receiving 152 mm over 23 days, just slightly more than July's 145 mm during the same number of days. Humidity is also marginally elevated in August at 90%, compared to July's 88%. For more detailed information about July's weather, visit Siem Reap weather in July.
August and September exhibit similarities in their warm, humid climates, but September tends to be slightly cooler and wetter. In August, the temperatures range from a minimum of 25°C (77°F) to a maximum of 37°C (99°F), while September features a slightly lower range with minimums of 24°C (76°F) and maximums of 35°C (96°F). Precipitation increases in September, reaching 240 mm (9.4 in) over 25 days, compared to August's 152 mm (6.0 in) over 23 days. Despite these differences, both months maintain a humidity level of 90%, contributing to the sticky tropical atmosphere. For a more detailed look at September weather in Siem Reap, you can check Siem Reap weather in September.
August and October present distinct differences in weather patterns. In August, temperatures range from a minimum of 25°C (77°F) to a maximum of 37°C (99°F), with an average of 29°C (85°F). The month experiences significant rainfall, with 152 mm (6.0 in) over approximately 23 days and high humidity at 90%. In contrast, October sees slightly milder temperatures, with a minimum of 22°C (72°F), an average of 28°C (83°F), and a maximum of 34°C (93°F). Precipitation increases to 238 mm (9.4 in) over 22 days, accompanied by a lower humidity level of 85%. For a detailed look at the weather conditions during October, you can explore Siem Reap weather in October.
August and November weather show distinct differences, particularly in temperature and humidity. In August, temperatures can soar, with a minimum of 25°C (77°F) and a maximum reaching up to 37°C (99°F), alongside high humidity levels of 90%. This month also experiences substantial rainfall, averaging 152 mm (6.0 in) over 23 days. In contrast, November sees milder temperatures with a minimum of 21°C (71°F) and a maximum of 34°C (94°F), and there is a reduction in humidity to 79%. Precipitation in November is also lower, with about 78 mm (3.1 in) over 13 days, making it a more comfortable time of year. For more detailed insights on temperatures and conditions, check out Siem Reap weather in November.
In August, the weather is significantly warmer and more humid, with average temperatures around 29°C (85°F) and maximums reaching up to 37°C (99°F). The month is also characterized by frequent rainfall, receiving about 152 mm (6.0 in) of precipitation over 23 days, resulting in a high humidity level of 90%. In contrast, December offers a much cooler and drier climate, with average temperatures of 26°C (80°F) and maximums of 34°C (94°F). Precipitation drops dramatically to just 23 mm (0.9 in) over only 5 days, and humidity decreases to a more comfortable 68%. For more information, you can visit Siem Reap weather in December.
In August, Siem Reap experiences a shift in its weather dynamics, distinctly characterized by higher humidity levels and increased rainfall, making it more challenging for outdoor activities. With average temperatures lingering around a warm 29°C (85°F) and maximums reaching up to 37°C (99°F), visitors may find themselves grappling with the intense heat and frequent showers, as over 20 days of precipitation contribute to a lush and vibrant landscape. This month sets itself apart with a unique blend of tropical conditions, offering a different side of Siem Reap that is best embraced with adaptability. For a deeper understanding of what to expect, you can explore more about the region by visiting Siem Reap Climate.