Last updated: August 21, 2025
December in Siem Reap, Cambodia offers a delightful tropical experience, characterized by a maximum temperature reaching 34°C (94°F) and an average of 26°C (80°F). As the cool season sets in, visitors can enjoy the pleasant climate with minimum temperatures dipping to 16°C (61°F). Although December sees around 23 mm (0.9 in) of precipitation over approximately 5 days, the humidity remains at a comfortable 68%, making it an excellent time for exploring the incredible temples and vibrant culture of this enchanting city.
In December, Siem Reap experiences a delightful dip in temperatures, making it one of the most pleasant months of the year. With a minimum of 16°C (61°F) and an average of 26°C (80°F), the pleasant weather is a welcome change from the hotter months preceding it. The maximum temperature of 34°C (94°F) provides enough warmth to enjoy the stunning temples and vibrant local culture without the oppressive heat that often characterizes the summer. As the year draws to a close, the gradual cooling trend from November becomes evident, enticing visitors to explore the wonders of Cambodia in a comfortable climate.
In December, Siem Reap experiences a notable shift in precipitation, with 23 mm (0.9 in) of rain falling over approximately 5 days. This marks a significant decline from the intense rainfalls of previous months, particularly September and October, which see totals of nearly 240 mm (9.4 in) each. As the region transitions from the peak wet season, the lighter rainfall provides a refreshing respite, making December an appealing time for visitors. The decrease in precipitation not only enhances outdoor activities but also allows for clearer skies, adding to the area's enchanting charm. Overall, December serves as a gradual tapering off from the monsoon rains, setting the stage for the drier months ahead.
In December, Siem Reap experiences a noticeable dip in humidity, settling at a comfortable 68%, amidst the rainy season's wrap-up. This marks a shift from the intense humidity levels that peak during the mid-year months, particularly in August and September, where figures soar to a staggering 90%. Following a gradual ascent from the drier climate of early months—where January sees just 55%—December offers a reprieve, blending a mild increase from the 79% of November while still providing a refreshing atmosphere perfect for exploring ancient temples. As the year winds down, visitors can enjoy the lush landscapes without the oppressive stickiness of peak summer months, making December a delightful time to experience Siem Reap's charm.
In December, Siem Reap, Cambodia, experiences a UV Index of 10, placing it in the very high exposure category with a burn time of approximately 15 minutes. This month marks a slight decline from the extreme levels of the preceding months, where the UV Index frequently soared to 14 or 15. Notably, from January to November, the UV Index remained consistently high, reflecting the region's persistent intense sunlight. As December approaches, while the UV levels ease slightly, it's still essential for outdoor enthusiasts to take precautions against sun exposure. For those planning their visit or outdoor activities, staying informed about the UV Index can help ensure a safe and enjoyable experience. For more details, check out the Siem Reap UV Index.
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In December, Siem Reap, Cambodia basks in an impressive 314 hours of sunshine, continuing its tradition of abundant light as it transitions from the rainy season. This month marks a slight decline from the vibrant sunlit days of March, which boasts the year's peak with 326 hours. However, it remains well above the monthly averages seen earlier in the year, such as August's 287 hours. As the year draws to a close, December captures the essence of dry season delight, offering warm and bright days that invite exploration of the ancient temples and rich culture—a perfect finale to a sun-soaked year.
In December, Siem Reap, Cambodia, sees a 43% chance of sunny weather, making it a relatively promising time for sun-seekers compared to the preceding months. As the year winds down, the likelihood of sunny days begins to rise again after the rain-drenched summer, where chances plummet to as low as 8% in August and only 10% in October. While December's sunshine odds still fall short of the peak 75% experienced in February, the month's sunlight is a welcome respite as the dry season approaches. Overall, while visitors may encounter some cloud cover, December generally offers a pleasant balance of sunshine and cooler temperatures, ideal for exploring the ancient temples and vibrant culture of the region.
In Siem Reap, Cambodia, the daylight duration exhibits a rhythmic pattern throughout the year, peaking in the warmer months. From January to February, the city enjoys a steady 11 hours of daylight, providing ample time to explore its vibrant culture and breathtaking temples. As spring arrives in March, daylight increases to 12 hours, a trend that continues through much of the summer until September. This consistent sunlight encourages outdoor activities and adventures. As October rolls in, daylight dips back to 11 hours, a shift that continues into November and December, signaling the arrival of cooler months. This cyclical transition not only shapes daily life in Siem Reap but also enhances its charm throughout the seasons.
As December rolls in, the winds in Siem Reap, Cambodia, present a gentle and refreshing 2.5 m/s (6 mph), mirroring the slightly stronger gusts of earlier months like June and July. This time of year, the breeze is notably more consistent and mild, providing a pleasant backdrop to the vibrant cultural landscape. Notably, wind speeds in the months preceding December, particularly from April to November, hovered around a modest 2.1 to 2.4 m/s, showcasing a trend of moderate airflow. As the year draws to a close, the return to December's breezy charm is not just a climatic shift but an invitation to experience the enchanting atmosphere of this historic region, where even the winds seem to whisper tales of adventure.
Weather in Siem Reap varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Siem Reap, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather in Siem Reap features a minimum temperature of 16°C (61°F) and averages around 26°C (80°F), with a maximum reaching 34°C (94°F). The month experiences 23 mm (0.9 in) of precipitation over about 5 days, along with a humidity level of 68%. Conversely, January sees slightly warmer conditions with a minimum of 15°C (59°F) and an average temperature of 27°C (81°F), peaking at 35°C (95°F). The rainfall is significantly reduced, totaling 11 mm (0.4 in) over just 2 days, and humidity decreases to a more comfortable 55%. For a detailed look at January weather, check out Siem Reap weather in January.
In December, Siem Reap experiences a warm climate with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 34°C (94°F), averaging around 26°C (80°F). The month sees a fair amount of precipitation, with about 23 mm (0.9 in) falling over approximately 5 days, contributing to a humidity level of 68%. In contrast, February tends to be slightly warmer overall, with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 36°C (97°F) and an average of 28°C (82°F). This month is drier, receiving only 9 mm (0.3 in) of rain over just 2 days, resulting in lower humidity at 50%. For more detailed information, check out the Siem Reap weather in February.
In December, the weather is generally mild with temperatures ranging from a comfortable minimum of 16°C (61°F) to a maximum of 34°C (94°F), making it an ideal time for outdoor activities. The humidity levels are relatively high at 68%, and there is light precipitation, averaging 23 mm (0.9 in) over about 5 days. In contrast, March sees a noticeable increase in heat, with minimum temperatures around 22°C (72°F) and maximums reaching up to 37°C (99°F). The humidity drops to 47%, but precipitation increases slightly to 40 mm (1.6 in) over approximately 6 days. For more detailed insights into weather patterns, you can visit Siem Reap weather in March.
In December, the weather in Siem Reap is characterized by relatively mild temperatures, with minimums around 16°C (61°F) and averages of 26°C (80°F), reaching a maximum of 34°C (94°F). The month sees some precipitation, totaling 23 mm (0.9 in) over approximately 5 days, and humidity levels are higher at 68%. In contrast, April experiences warmer temperatures, with minimums of 20°C (68°F) and average highs of 39°C (102°F), making it notably hotter. Rainfall increases significantly to 86 mm (3.4 in) distributed over about 14 days, although humidity is lower at 55%. This stark difference in precipitation and temperature highlights the transition from the cooler, drier December to the hotter and wetter April. For more details on April weather, you can check Siem Reap weather in April.
In December, the weather is warm and relatively dry, with temperatures ranging from a comfortable minimum of 16°C (61°F) to a maximum of 34°C (94°F). It experiences about 23 mm (0.9 in) of precipitation over five days, along with a humidity level of 68%. In contrast, May brings significantly hotter conditions, with temperatures soaring from a minimum of 22°C (72°F) to a scorching maximum of 39°C (103°F). This month also sees much higher rainfall, accumulating 141 mm (5.6 in) over 20 days, and higher humidity at 78%. For more details on the climate during this month, check out Siem Reap weather in May.
In December, the weather is typically warm and pleasant, 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). Precipitation is relatively low, with about 23 mm (0.9 in) over approximately 5 days and a humidity level of 68%. In contrast, June brings much hotter conditions, with temperatures reaching a minimum of 26°C (79°F) and soaring up to 38°C (100°F), averaging around 30°C (86°F). The rain is more frequent in June, with about 117 mm (4.6 in) of precipitation over 21 days and higher humidity levels at 86%. For more detailed information, check out Siem Reap weather in June.
When comparing the weather in December and July, it's clear that July is significantly hotter and wetter. In December, temperatures range from a mild minimum of 16°C (61°F) to a maximum of 34°C (94°F), while July sees much higher temperatures with a minimum of 25°C (77°F) and a peak reaching 38°C (101°F). Precipitation levels also differ greatly; December has just 23 mm (0.9 in) of rain over five days, whereas July experiences a substantial 145 mm (5.7 in) spread across 23 days, leading to a much higher humidity level of 88%. For a more detailed look at July's weather characteristics, visit Siem Reap weather in July.
In December, the weather in Siem Reap is generally more comfortable, 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). The precipitation during this month is relatively low at 23 mm (0.9 in), spread over about 5 days, and the humidity sits at 68%.
In contrast, August tends to be much hotter and more humid. With minimum temperatures around 25°C (77°F) and a maximum reaching 37°C (99°F), the average of 29°C (85°F) reflects these conditions. Additionally, August experiences significantly higher rainfall, totaling 152 mm (6.0 in) over approximately 23 days, and humidity levels peak at 90%. This makes August much wetter and muggier than December. For more details on the August weather, visit Siem Reap weather in August.
In comparing the weather between December and September, December offers milder temperatures, with a minimum of 16°C (61°F) and an average of 26°C (80°F), compared to September's minimum of 24°C (76°F) and average of 28°C (84°F). While December enjoys less precipitation, totaling only 23 mm (0.9 in) over 5 days, September is significantly wetter, with 240 mm (9.4 in) spread across 25 days. Humidity levels also differ, as December's 68% is noticeably lower than September's high humidity of 90%. For a more detailed look at September weather, you can visit Siem Reap weather in September.
In a comparison of December and October weather, December features slightly cooler temperatures, with a minimum of 16°C (61°F) and an average of 26°C (80°F), while October starts off warmer, boasting a minimum temperature of 22°C (72°F) and an average of 28°C (83°F). Both months experience maximum temperatures around 34°C (93-94°F), but October is notably wetter, with 238 mm (9.4 in) of precipitation across 22 days compared to December’s 23 mm (0.9 in) over just 5 days. Additionally, October's humidity levels are higher at 85%, compared to December's 68%. For more details, you can check Siem Reap weather in October.
In December, the weather tends to be slightly cooler than in November, with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 34°C (94°F), compared to November's milder temperatures of 21°C (71°F) to 34°C (94°F). While December has lower average precipitation at 23 mm (0.9 in) over 5 days, November sees much higher rainfall of 78 mm (3.1 in) spread across 13 days. Additionally, humidity levels are also lower in December at 68%, compared to 79% in November. For a more detailed comparison, you can check out Siem Reap weather in November.
As December unfolds in Siem Reap, travelers can expect a delightful shift in weather, characterized by milder temperatures compared to the sweltering heat of earlier months. With daytime highs reaching a comfortable 34°C (94°F) and cooler evenings dropping to around 16°C (61°F), it's an ideal time to explore the region's stunning temples and vibrant culture. While humidity remains at 68%, the relatively low 23 mm of precipitation spread over just a handful of days makes this month one of the driest of the year. This pleasant climate not only enhances outdoor activities but also sets the stage for memorable experiences. For a more detailed understanding of what to expect throughout the year, check out the comprehensive guide on Siem Reap Climate.