Last updated: August 21, 2025
May in Siem Reap, Cambodia offers a tropical experience, characterized by a maximum temperature soaring to 39°C (103°F) and an average temperature of 30°C (86°F). As the month progresses, visitors can expect a minimum temperature dropping to 22°C (72°F), creating warm and humid conditions with an average humidity level reaching 78%. However, May is also notable for its rainfall, with precipitation amounting to 141 mm (5.6 in) over approximately 20 days. Travelers should prepare for brief, yet heavy showers amidst the heat, making it a month rich in both challenges and vibrant verdure.
In May, Siem Reap experiences warm and consistent temperatures, with daily lows around 22°C (72°F) and averages hovering at 30°C (86°F). As the month progresses, locals and visitors alike enjoy highs peaking at 39°C (103°F), making it one of the hottest months of the year. This trend follows a gradual ascent from April, where temperatures also reached similar heights, emphasizing the region's tropical climate. As summer approaches, the warmth intensifies, while humidity starts to rise, providing a sultry backdrop for exploring the majestic temple complex of Angkor Wat and the vibrant markets of Siem Reap. Be prepared with light, breathable clothing and stay hydrated to fully embrace the magic of this captivating destination!
In May, Siem Reap experiences a significant increase in precipitation, with 141 mm (5.6 in) of rain falling across 20 days. This marks a continuation of the wet season that began in April and reaches its peak in the following months. The rainfall in May is not only substantial but also sets the scene for lush greenery and vibrant landscapes, providing a stark contrast to the drier months of January and February. As the rain falls more frequently, the region prepares for the even heavier downpours of July and August, showcasing the dynamic climate pattern of this enchanting part of Cambodia.
As spring transitions into summer, May brings a significant rise in humidity in Siem Reap, Cambodia, with levels soaring to 78%. This marks a noticeable shift from the drier months of January through April, where humidity hovered between 47% and 55%. By May, the atmospheric moisture begins to intensify, setting the stage for the upcoming monsoon season. Following May, humidity levels will continue to escalate, peaking in the summer months of July and August, when they reach a staggering 88% to 90%. This trend highlights the importance of preparing for the sweltering, humid conditions that characterize the region during this time of year.
In May, Siem Reap, Cambodia, experiences an extreme UV Index of 14, indicating potent sun exposure that requires caution. With a burn time of just 10 minutes, this month continues the trend of elevated UV levels observed since January, peaking at 15 in March. As summer approaches, the UV index remains consistently high, aligning with previous months, reminding visitors to stay vigilant in sun protection. With similar readings extending into June and beyond, it's crucial to plan outdoor activities wisely. For more detailed information, visit Siem Reap UV Index.
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In Siem Reap, Cambodia, May shines brightly with an impressive 317 hours of sunlight, maintaining its status as one of the sunniest months of the year. This delightful weather follows closely on the heels of a strong April, which recorded 309 hours of sunshine, showcasing a trend of abundant daylight as the region transitions into the hotter season. As summer approaches, the sunshine hours remain consistently high, with June and July also offering over 300 hours. Notably, while the sunshine dips slightly in the subsequent months—August sees a decrease to 287 hours—the overall trend reveals the region's resilience in offering plenty of bright days. Thus, May not only stands out for its abundant sun but also sets the stage for a vibrant summer in this captivating destination.
In Siem Reap, Cambodia, May marks a distinct drop in the likelihood of sunny weather, with only a 30% chance of sunshine. This decline follows a pattern observed in the preceding months; after a relatively bright February at 75%, and a more moderate March at 62%, the chances of sunny days diminish as the rainy season approaches. April sees a further dip to 31%, setting the stage for May's overcast skies. As the region transitions into the wet months of June and July, the chances for sunlight decline sharply, illustrating a clear trend of decreasing brightness as summer unfolds. For those planning a visit, it's wise to embrace the possibility of rain while savoring the lush greenery that accompanies it.
In Siem Reap, Cambodia, the daylight duration experiences a gradual shift throughout the year, creating a warm and inviting atmosphere for both locals and visitors. Starting with consistent 11 hours of daylight in January and February, the days begin to lengthen by March, reaching 12 hours as the region transitions into the heart of spring. This trend of 12-hour days continues through the summer months, offering an abundance of sunlight perfect for exploring the iconic temples and lush landscapes. As October arrives, daylight gradually decreases back to 11 hours leading into the cooler, drier months of November and December. This cyclical pattern not only defines the rhythm of life in Siem Reap but also allows travelers to enjoy nearly year-round sunshine.
In May, Siem Reap experiences a gentle breeze, with an average wind speed of 2.2 m/s (5 mph). This slight uptick from April's 2.1 m/s offers a refreshing respite as the region transitions towards the lush green landscapes of the rainy season. The calm winds in May are part of a broader trend, where the early months see relatively low wind speeds, gradually increasing as summer approaches. Notably, June and July witness a rise, with wind speeds reaching around 3.3 m/s (7 mph), bringing a more invigorating atmosphere. Thus, while May remains tranquil, it serves as a subtle prelude to the lively breezes of the coming months, enhancing the charm of Siem Reap's vibrant surroundings.
Weather in Siem Reap varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Siem Reap, focusing on differences in temperature, rainfall, humidity, and UV levels.
In May, the weather tends to be much warmer and more humid compared to January, with temperatures ranging from a minimum of 22°C (72°F) to a sweltering maximum of 39°C (103°F), and an average temperature of 30°C (86°F). This month also sees significantly more rainfall, with 141 mm (5.6 in) of precipitation spread over 20 days, resulting in high humidity levels at 78%. In contrast, January offers a milder climate, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 35°C (95°F) and an average of 27°C (81°F). Rainfall is minimal, just 11 mm (0.4 in) over 2 days, contributing to a lower humidity level of 55%. For a detailed look at the January climate conditions, you can visit Siem Reap weather in January.
When comparing the weather in May and February, distinct differences emerge. May boasts a higher average temperature of 30°C (86°F) with daily highs reaching up to 39°C (103°F), while February's temperatures are milder, with an average of 28°C (82°F) and maximums around 36°C (97°F). Additionally, May experiences significantly more rainfall, totaling 141 mm (5.6 in) over 20 days, compared to February's minimal 9 mm (0.3 in) across just 2 days. Furthermore, the humidity is notably higher in May at 78%, contrasted with February's more comfortable 50%. For a more detailed look at February’s climate, you can check Siem Reap weather in February.
In comparing the weather of May and March, both months experience a similar minimum and average temperature of 22°C (72°F) and 30°C (86°F), respectively. However, May sees a higher maximum temperature of 39°C (103°F), compared to March's peak of 37°C (99°F). Additionally, May is much wetter, with 141 mm (5.6 in) of precipitation over 20 days, while March has a significantly drier climate, recording only 40 mm (1.6 in) of rainfall over just 6 days. The humidity also varies considerably, with May's humidity at 78%, making it noticeably more humid than March's 47%. For more detailed insights into March's conditions, you can check Siem Reap weather in March.
In comparing the weather between April and May, both months experience remarkably high average temperatures, generally hovering around 30°C (86°F). However, May tends to be slightly warmer with minimum and maximum temperatures of 22°C (72°F) and 39°C (103°F), respectively, while April has minimum and maximum temperatures of 20°C (68°F) and 39°C (102°F). One notable difference is the increased precipitation in May, which sees 141 mm (5.6 in) over 20 days compared to April's 86 mm (3.4 in) across 14 days. This results in significantly higher humidity in May at 78%, compared to April’s 55%. For a more detailed look at the weather trends, you can check Siem Reap weather in April.
In comparing the weather between May and June, we see similar averages but some notable differences. May features a wider temperature range, with minimums dipping to 22°C (72°F) and maximums soaring to 39°C (103°F), while June's temperatures start higher, with a minimum of 26°C (79°F) and a maximum of 38°C (100°F). Precipitation is slightly lower in June at 117 mm (4.6 in) compared to May's 141 mm (5.6 in), despite June experiencing one additional day of rainfall. Humidity also rises in June to 86%, up from 78% in May, suggesting a more muggy atmosphere. For more detailed information, check out Siem Reap weather in June.
In comparing the weather between May and July, both months showcase warm temperatures, but July tends to be slightly cooler on average. May has a minimum temperature of 22°C and can reach a high of 39°C, while July starts at a higher minimum of 25°C and peaks at 38°C. Precipitation patterns are similar, with May receiving 141 mm over 20 days and July slightly higher at 145 mm over 23 days, indicating that both months are relatively wet. The humidity also rises in July to 88%, exceeding May's 78%, which may contribute to a more uncomfortable heat. For a detailed look at July's weather, visit Siem Reap weather in July.
In comparing the weather between May and August, both months showcase warm temperatures, but there are notable differences. May experiences a wider temperature range, with minimums at 22°C and maximums peaking at 39°C, leading to an average of 30°C. In contrast, August has slightly higher minimum temperatures of 25°C and averages around 29°C, with maximums reaching 37°C. Precipitation is also more prevalent in August, with 152 mm over 23 days compared to May's 141 mm over 20 days, contributing to the higher humidity levels of 90% in August versus 78% in May. For more detailed insights on August weather, you can visit Siem Reap weather in August.
When comparing the weather in May and September, it is evident that September tends to be more humid and wetter. May features a temperature range with minimums of 22°C (72°F) and maximums reaching up to 39°C (103°F), along with an average temperature of 30°C (86°F) and 141 mm (5.6 in) of precipitation over about 20 days. In contrast, September sees slightly higher minimum temperatures at 24°C (76°F) and lower maximums of 35°C (96°F), with an average temperature of 28°C (84°F). However, it experiences significantly more rainfall, totaling 240 mm (9.4 in) over approximately 25 days, coupled with higher humidity at 90%. For more detailed insights, you can check Siem Reap weather in September.
May and October present contrasting weather conditions in Siem Reap. May boasts higher average temperatures, with highs reaching up to 39°C (103°F), making it one of the hotter months. In contrast, October features cooler temperatures, peaking at 34°C (93°F), but with increased humidity at 85%, which can feel quite muggy. Additionally, October experiences more precipitation, totaling 238 mm (9.4 inches) over 22 days, compared to May's 141 mm (5.6 inches) across 20 days. For a detailed look at what to expect, check out Siem Reap weather in October.
May and November in Siem Reap present distinct weather patterns that reflect the transition between the hotter and cooler seasons. In May, temperatures can soar with minimums around 22°C (72°F) and maximums reaching up to 39°C (103°F), while the average temperature is a warm 30°C (86°F). This month also sees significant precipitation, with 141 mm (5.6 in) spread over 20 days, contributing to a humid environment with levels around 78%. In contrast, November offers a more temperate climate, characterized by a slightly lower average temperature of 27°C (82°F) and maximums peaking at 34°C (94°F). Precipitation decreases to 78 mm (3.1 in) over just 13 days, and humidity remains comparable at 79%. For a detailed look at what November has to offer, you can explore Siem Reap weather in November.
In May, the weather is characterized by significantly higher temperatures, with minimums around 22°C (72°F) and maximums peaking at 39°C (103°F), while the average hovers at 30°C (86°F). The month is also quite wet, receiving about 141 mm (5.6 in) of precipitation over 20 days, along with a high humidity level of 78%. In contrast, December sees much more moderate conditions, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 34°C (94°F) and an average of 26°C (80°F). This month enjoys notably less rainfall, with only 23 mm (0.9 in) over 5 days and humidity at a lower 68%. For more details, you can check out Siem Reap weather in December.
As May unfolds in Siem Reap, the heat intensifies, with temperatures frequently soaring to sweltering heights, making it one of the hottest months of the year. Unlike the relatively cooler preceding months, this period is marked by an uncomfortable blend of high humidity and frequent rainfall, averaging about 20 days of precipitation. Travelers can expect a lush, tropical landscape but should be prepared for the challenges posed by both the soaring heat and the sticky, humid conditions. For those planning to explore this vibrant region, it’s essential to stay informed about the local climate. For detailed insights, check out Siem Reap Climate.