Siem Reap Weather in December
December in Siem Reap averages 32°C (90°F) during the day and 22°C (72°F) at night. The perfect conditions and low rainfall make it a solid month to visit.
Rainfall in Siem Reap in December
The climate data from previous years indicates about 2 days of rain, averaging 17 mm (0.7 in) for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.
Temperature in Siem Reap in December
Siem Reap has perfect weather in December, with days reaching 32°C (90°F) and nights cooling to 22°C (72°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With overnight lows of 22°C (72°F), evenings stay pleasantly warm. Though it's the cooler month of the year, the weather remains warm. Ideal for enjoying the outdoors.If you favor pleasant temperatures and minimal rainfall, December is one of the best months to visit Siem Reap.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Cambodia, check out our Siem Reap's climate page.
Siem Reap Temperature in December
Min Temperature
22°C (72°F)
Max Temperature
32°C (90°F)
Chance of Rain
8%
Precipitation
17 mm (0.7 in)
Rainy days
2 days
Humidity
64%
Historical weather for Siem Reap in December
Browse day-by-day weather records for Siem Reap spanning 34 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Siem Reap historical weather extremes in December
Our historical data for Siem Reap spans 2006 to 2025, revealing these weather extremes.
- On December 13, 2015, temperatures climbed to 37°C (99°F), marking the warmest December day on record.
- On December 20, 2020, Siem Reap saw its coldest December day with temperatures maxing out at 23°C (73°F).
- Siem Reap registered its coldest December night on December 20, 2017, with temperatures dropping to 15°C (59°F).
Best Places in Cambodia in December
Find out more about the weather in Cambodia and which places have the best travel conditions in this month. See all of Cambodia in December →
perfect weather
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What to Wear in Siem Reap in December
Warm but pleasant conditions in Siem Reap in December. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Dry conditions mean you won't need to worry about rain protection.What To Do in Siem Reap in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Cambodia, check out our Siem Reap's climate page.
See the full Siem Reap climate overview or explore weather in Cambodia.
